/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/Problem18_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:20:59,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:20:59,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:20:59,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:20:59,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:20:59,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:20:59,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:20:59,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:20:59,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:20:59,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:20:59,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:20:59,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:20:59,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:20:59,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:20:59,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:20:59,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:20:59,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:20:59,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:20:59,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:20:59,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:20:59,934 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 19:20:59,950 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:20:59,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:20:59,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:20:59,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:20:59,952 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:20:59,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:20:59,953 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:20:59,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:20:59,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:20:59,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:20:59,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:20:59,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:20:59,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:20:59,954 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:20:59,954 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:20:59,955 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:20:59,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:20:59,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:20:59,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:20:59,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:20:59,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:20:59,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:20:59,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:20:59,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:20:59,956 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:20:59,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:20:59,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:20:59,957 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:20:59,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:21:00,217 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:21:00,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:21:00,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:21:00,236 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:21:00,237 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:21:00,238 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30.c [2019-11-06 19:21:00,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614c10293/4340c9db3c0048c2934f409f7e566348/FLAG185364585 [2019-11-06 19:21:01,012 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:21:01,015 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label30.c [2019-11-06 19:21:01,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614c10293/4340c9db3c0048c2934f409f7e566348/FLAG185364585 [2019-11-06 19:21:01,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/614c10293/4340c9db3c0048c2934f409f7e566348 [2019-11-06 19:21:01,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:21:01,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:21:01,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:01,168 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:21:01,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:21:01,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:01" (1/1) ... [2019-11-06 19:21:01,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3da7fd09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:01, skipping insertion in model container [2019-11-06 19:21:01,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:21:01" (1/1) ... [2019-11-06 19:21:01,185 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:21:01,309 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:21:02,570 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:02,585 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:21:03,091 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:21:03,118 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:21:03,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03 WrapperNode [2019-11-06 19:21:03,119 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:21:03,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:21:03,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:21:03,122 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:21:03,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (1/1) ... [2019-11-06 19:21:03,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (1/1) ... [2019-11-06 19:21:03,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (1/1) ... [2019-11-06 19:21:03,187 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (1/1) ... [2019-11-06 19:21:03,321 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (1/1) ... [2019-11-06 19:21:03,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (1/1) ... [2019-11-06 19:21:03,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (1/1) ... [2019-11-06 19:21:03,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:21:03,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:21:03,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:21:03,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:21:03,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (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 19:21:03,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:21:03,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:21:03,470 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:21:03,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:21:03,471 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:21:03,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:21:03,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:21:03,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:21:03,471 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:21:03,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:21:03,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:21:03,472 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:21:03,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:21:03,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:21:03,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:21:07,221 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:21:07,222 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:21:07,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:07 BoogieIcfgContainer [2019-11-06 19:21:07,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:21:07,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:21:07,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:21:07,229 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:21:07,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:21:01" (1/3) ... [2019-11-06 19:21:07,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c44800d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:07, skipping insertion in model container [2019-11-06 19:21:07,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:21:03" (2/3) ... [2019-11-06 19:21:07,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c44800d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:21:07, skipping insertion in model container [2019-11-06 19:21:07,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:21:07" (3/3) ... [2019-11-06 19:21:07,233 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label30.c [2019-11-06 19:21:07,243 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:21:07,252 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:21:07,264 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:21:07,311 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:21:07,311 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:21:07,311 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:21:07,311 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:21:07,311 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:21:07,312 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:21:07,312 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:21:07,312 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:21:07,359 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 19:21:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 19:21:07,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:07,371 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] [2019-11-06 19:21:07,373 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:07,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:07,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2051864770, now seen corresponding path program 1 times [2019-11-06 19:21:07,453 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:07,454 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507522825] [2019-11-06 19:21:07,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:07,810 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 19:21:07,811 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507522825] [2019-11-06 19:21:07,812 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:07,812 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:21:07,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123160265] [2019-11-06 19:21:07,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:21:07,821 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:07,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:21:07,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:21:07,838 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-11-06 19:21:18,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:18,691 INFO L93 Difference]: Finished difference Result 3000 states and 5781 transitions. [2019-11-06 19:21:18,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:21:18,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2019-11-06 19:21:18,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:18,736 INFO L225 Difference]: With dead ends: 3000 [2019-11-06 19:21:18,736 INFO L226 Difference]: Without dead ends: 2142 [2019-11-06 19:21:18,747 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 19:21:18,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-11-06 19:21:18,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138. [2019-11-06 19:21:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2138 states. [2019-11-06 19:21:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3344 transitions. [2019-11-06 19:21:18,917 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3344 transitions. Word has length 49 [2019-11-06 19:21:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:18,920 INFO L462 AbstractCegarLoop]: Abstraction has 2138 states and 3344 transitions. [2019-11-06 19:21:18,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:21:18,921 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3344 transitions. [2019-11-06 19:21:18,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-11-06 19:21:18,940 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:18,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:18,941 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:18,942 INFO L82 PathProgramCache]: Analyzing trace with hash -600771033, now seen corresponding path program 1 times [2019-11-06 19:21:18,942 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:18,942 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495376369] [2019-11-06 19:21:18,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:19,279 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495376369] [2019-11-06 19:21:19,280 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:21:19,280 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:21:19,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461965060] [2019-11-06 19:21:19,284 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:21:19,284 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:21:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:21:19,285 INFO L87 Difference]: Start difference. First operand 2138 states and 3344 transitions. Second operand 8 states. [2019-11-06 19:21:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:21:29,957 INFO L93 Difference]: Finished difference Result 8662 states and 13798 transitions. [2019-11-06 19:21:29,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:21:29,957 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 118 [2019-11-06 19:21:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:21:29,992 INFO L225 Difference]: With dead ends: 8662 [2019-11-06 19:21:29,992 INFO L226 Difference]: Without dead ends: 6530 [2019-11-06 19:21:29,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:21:30,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6530 states. [2019-11-06 19:21:30,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 6509. [2019-11-06 19:21:30,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6509 states. [2019-11-06 19:21:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 8974 transitions. [2019-11-06 19:21:30,172 INFO L78 Accepts]: Start accepts. Automaton has 6509 states and 8974 transitions. Word has length 118 [2019-11-06 19:21:30,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:21:30,173 INFO L462 AbstractCegarLoop]: Abstraction has 6509 states and 8974 transitions. [2019-11-06 19:21:30,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:21:30,173 INFO L276 IsEmpty]: Start isEmpty. Operand 6509 states and 8974 transitions. [2019-11-06 19:21:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-11-06 19:21:30,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:21:30,178 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:21:30,179 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:21:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:21:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1361568454, now seen corresponding path program 1 times [2019-11-06 19:21:30,179 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:21:30,179 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291383875] [2019-11-06 19:21:30,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:21:30,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:30,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 177 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:21:30,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291383875] [2019-11-06 19:21:30,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211378438] [2019-11-06 19:21:30,717 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 19:21:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:21:30,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:21:30,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:21:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:21:31,112 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:21:31,112 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:21:31,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520474288] [2019-11-06 19:21:31,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:21:31,116 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:21:31,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:21:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:21:31,120 INFO L87 Difference]: Start difference. First operand 6509 states and 8974 transitions. Second operand 11 states.