/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/Problem10_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:05:21,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:05:21,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:05:21,913 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:05:21,923 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:05:21,924 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:05:21,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:05:21,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:05:21,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:05:21,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:05:21,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:05:21,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:05:21,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:05:21,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:05:21,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:05:21,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:05:21,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:05:21,947 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:05:21,948 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:05:21,948 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:05:21,949 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 19:05:21,964 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:05:21,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:05:21,965 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:05:21,965 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:05:21,966 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:05:21,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:05:21,966 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:05:21,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:05:21,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:05:21,967 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:05:21,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:05:21,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:05:21,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:05:21,967 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:05:21,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:05:21,968 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:05:21,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:05:21,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:05:21,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:05:21,969 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:05:21,969 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:05:21,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:05:21,969 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:05:21,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:05:21,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:05:21,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:05:21,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:05:21,970 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:05:21,970 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:05:22,258 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:05:22,277 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:05:22,282 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:05:22,284 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:05:22,285 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:05:22,286 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-11-06 19:05:22,357 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2522302e9/9a9987563f5642698c825792e6396703/FLAG2ac0ef233 [2019-11-06 19:05:22,925 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:05:22,926 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label23.c [2019-11-06 19:05:22,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2522302e9/9a9987563f5642698c825792e6396703/FLAG2ac0ef233 [2019-11-06 19:05:23,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2522302e9/9a9987563f5642698c825792e6396703 [2019-11-06 19:05:23,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:05:23,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:05:23,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:05:23,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:05:23,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:05:23,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:23,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@329037be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23, skipping insertion in model container [2019-11-06 19:05:23,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:23,213 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:05:23,273 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:05:23,839 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:05:23,845 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:05:23,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:05:23,974 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:05:23,974 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23 WrapperNode [2019-11-06 19:05:23,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:05:23,975 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:05:23,975 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:05:23,975 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:05:23,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:23,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:24,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:24,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:24,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:24,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:24,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (1/1) ... [2019-11-06 19:05:24,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:05:24,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:05:24,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:05:24,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:05:24,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (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 19:05:24,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:05:24,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:05:24,156 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:05:24,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:05:24,156 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:05:24,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:05:24,157 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:05:24,157 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:05:24,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:05:24,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:05:24,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:05:25,423 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:05:25,426 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:05:25,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:05:25 BoogieIcfgContainer [2019-11-06 19:05:25,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:05:25,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:05:25,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:05:25,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:05:25,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:05:23" (1/3) ... [2019-11-06 19:05:25,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af0f719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:05:25, skipping insertion in model container [2019-11-06 19:05:25,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:05:23" (2/3) ... [2019-11-06 19:05:25,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af0f719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:05:25, skipping insertion in model container [2019-11-06 19:05:25,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:05:25" (3/3) ... [2019-11-06 19:05:25,442 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label23.c [2019-11-06 19:05:25,455 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:05:25,465 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:05:25,478 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:05:25,513 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:05:25,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:05:25,514 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:05:25,514 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:05:25,514 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:05:25,514 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:05:25,515 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:05:25,515 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:05:25,545 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 19:05:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 19:05:25,556 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:25,558 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] [2019-11-06 19:05:25,559 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:25,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2063812481, now seen corresponding path program 1 times [2019-11-06 19:05:25,573 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:25,573 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184756931] [2019-11-06 19:05:25,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:25,989 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 19:05:25,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184756931] [2019-11-06 19:05:25,991 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:05:25,991 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:05:25,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883365697] [2019-11-06 19:05:26,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:05:26,000 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:05:26,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:05:26,018 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-11-06 19:05:28,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:28,053 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-11-06 19:05:28,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:05:28,055 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-11-06 19:05:28,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:28,085 INFO L225 Difference]: With dead ends: 730 [2019-11-06 19:05:28,085 INFO L226 Difference]: Without dead ends: 447 [2019-11-06 19:05:28,096 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 19:05:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-06 19:05:28,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-11-06 19:05:28,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-11-06 19:05:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-11-06 19:05:28,216 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 52 [2019-11-06 19:05:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:28,217 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-11-06 19:05:28,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:05:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-11-06 19:05:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 19:05:28,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:28,224 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:28,225 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:28,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:28,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1911288886, now seen corresponding path program 1 times [2019-11-06 19:05:28,226 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:28,226 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637610853] [2019-11-06 19:05:28,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:05:28,651 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637610853] [2019-11-06 19:05:28,651 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:05:28,651 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:05:28,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556986962] [2019-11-06 19:05:28,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:05:28,657 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:28,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:05:28,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:05:28,658 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 8 states. [2019-11-06 19:05:31,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:31,079 INFO L93 Difference]: Finished difference Result 1673 states and 2829 transitions. [2019-11-06 19:05:31,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:05:31,081 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 134 [2019-11-06 19:05:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:31,097 INFO L225 Difference]: With dead ends: 1673 [2019-11-06 19:05:31,097 INFO L226 Difference]: Without dead ends: 1238 [2019-11-06 19:05:31,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:05:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2019-11-06 19:05:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1196. [2019-11-06 19:05:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2019-11-06 19:05:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1791 transitions. [2019-11-06 19:05:31,216 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1791 transitions. Word has length 134 [2019-11-06 19:05:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:31,219 INFO L462 AbstractCegarLoop]: Abstraction has 1196 states and 1791 transitions. [2019-11-06 19:05:31,219 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:05:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1791 transitions. [2019-11-06 19:05:31,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 19:05:31,236 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:31,236 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:31,236 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:31,238 INFO L82 PathProgramCache]: Analyzing trace with hash 614464170, now seen corresponding path program 1 times [2019-11-06 19:05:31,238 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:31,239 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826050807] [2019-11-06 19:05:31,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:31,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:31,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:05:31,555 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826050807] [2019-11-06 19:05:31,556 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:05:31,556 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:05:31,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526392141] [2019-11-06 19:05:31,557 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:05:31,557 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:05:31,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:05:31,558 INFO L87 Difference]: Start difference. First operand 1196 states and 1791 transitions. Second operand 9 states. [2019-11-06 19:05:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:33,536 INFO L93 Difference]: Finished difference Result 3485 states and 5791 transitions. [2019-11-06 19:05:33,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:05:33,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 150 [2019-11-06 19:05:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:33,565 INFO L225 Difference]: With dead ends: 3485 [2019-11-06 19:05:33,566 INFO L226 Difference]: Without dead ends: 2295 [2019-11-06 19:05:33,574 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-11-06 19:05:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2295 states. [2019-11-06 19:05:33,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2295 to 1822. [2019-11-06 19:05:33,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-11-06 19:05:33,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2776 transitions. [2019-11-06 19:05:33,688 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2776 transitions. Word has length 150 [2019-11-06 19:05:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:33,690 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2776 transitions. [2019-11-06 19:05:33,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:05:33,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2776 transitions. [2019-11-06 19:05:33,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 19:05:33,696 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:33,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:05:33,696 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:33,697 INFO L82 PathProgramCache]: Analyzing trace with hash 628433146, now seen corresponding path program 1 times [2019-11-06 19:05:33,697 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:33,697 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286419178] [2019-11-06 19:05:33,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:33,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:05:34,086 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286419178] [2019-11-06 19:05:34,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:05:34,087 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:05:34,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462438826] [2019-11-06 19:05:34,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:05:34,088 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:34,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:05:34,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:05:34,089 INFO L87 Difference]: Start difference. First operand 1822 states and 2776 transitions. Second operand 9 states. [2019-11-06 19:05:35,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:35,509 INFO L93 Difference]: Finished difference Result 4429 states and 7107 transitions. [2019-11-06 19:05:35,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:05:35,509 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 174 [2019-11-06 19:05:35,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:35,538 INFO L225 Difference]: With dead ends: 4429 [2019-11-06 19:05:35,539 INFO L226 Difference]: Without dead ends: 2613 [2019-11-06 19:05:35,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:05:35,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2019-11-06 19:05:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2269. [2019-11-06 19:05:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2269 states. [2019-11-06 19:05:35,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 3105 transitions. [2019-11-06 19:05:35,645 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 3105 transitions. Word has length 174 [2019-11-06 19:05:35,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:35,646 INFO L462 AbstractCegarLoop]: Abstraction has 2269 states and 3105 transitions. [2019-11-06 19:05:35,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:05:35,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 3105 transitions. [2019-11-06 19:05:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-11-06 19:05:35,652 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:35,652 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:05:35,652 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash 880887528, now seen corresponding path program 1 times [2019-11-06 19:05:35,653 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:35,654 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861204613] [2019-11-06 19:05:35,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 166 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:05:35,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861204613] [2019-11-06 19:05:35,947 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629127689] [2019-11-06 19:05:35,947 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 19:05:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:36,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:05:36,114 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 167 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:05:36,256 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:05:36,256 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:05:36,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744873304] [2019-11-06 19:05:36,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:05:36,258 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:36,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:05:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:05:36,258 INFO L87 Difference]: Start difference. First operand 2269 states and 3105 transitions. Second operand 12 states. [2019-11-06 19:05:39,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:39,948 INFO L93 Difference]: Finished difference Result 6171 states and 8798 transitions. [2019-11-06 19:05:39,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 19:05:39,948 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 213 [2019-11-06 19:05:39,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:39,971 INFO L225 Difference]: With dead ends: 6171 [2019-11-06 19:05:39,971 INFO L226 Difference]: Without dead ends: 3763 [2019-11-06 19:05:39,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 19:05:39,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3763 states. [2019-11-06 19:05:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3763 to 3155. [2019-11-06 19:05:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3155 states. [2019-11-06 19:05:40,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 4139 transitions. [2019-11-06 19:05:40,122 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 4139 transitions. Word has length 213 [2019-11-06 19:05:40,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:40,122 INFO L462 AbstractCegarLoop]: Abstraction has 3155 states and 4139 transitions. [2019-11-06 19:05:40,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:05:40,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 4139 transitions. [2019-11-06 19:05:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-11-06 19:05:40,129 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:40,129 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:05:40,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:40,338 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1030862380, now seen corresponding path program 1 times [2019-11-06 19:05:40,338 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:40,339 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846594785] [2019-11-06 19:05:40,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:40,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-06 19:05:40,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846594785] [2019-11-06 19:05:40,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565788752] [2019-11-06 19:05:40,546 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 19:05:40,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:40,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:05:40,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-11-06 19:05:40,751 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:05:40,752 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:05:40,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304365560] [2019-11-06 19:05:40,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:05:40,753 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:40,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:05:40,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:05:40,754 INFO L87 Difference]: Start difference. First operand 3155 states and 4139 transitions. Second operand 3 states. [2019-11-06 19:05:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:41,360 INFO L93 Difference]: Finished difference Result 6304 states and 8275 transitions. [2019-11-06 19:05:41,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:05:41,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 227 [2019-11-06 19:05:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:41,377 INFO L225 Difference]: With dead ends: 6304 [2019-11-06 19:05:41,377 INFO L226 Difference]: Without dead ends: 3155 [2019-11-06 19:05:41,386 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:05:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3155 states. [2019-11-06 19:05:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3155 to 2863. [2019-11-06 19:05:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2863 states. [2019-11-06 19:05:41,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 3526 transitions. [2019-11-06 19:05:41,475 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 3526 transitions. Word has length 227 [2019-11-06 19:05:41,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:41,475 INFO L462 AbstractCegarLoop]: Abstraction has 2863 states and 3526 transitions. [2019-11-06 19:05:41,475 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:05:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 3526 transitions. [2019-11-06 19:05:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-06 19:05:41,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:41,482 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:05:41,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:41,685 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:41,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:41,686 INFO L82 PathProgramCache]: Analyzing trace with hash -746901927, now seen corresponding path program 1 times [2019-11-06 19:05:41,686 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:41,686 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570681966] [2019-11-06 19:05:41,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:41,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 122 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:05:42,043 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570681966] [2019-11-06 19:05:42,043 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198049922] [2019-11-06 19:05:42,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:42,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:05:42,134 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:42,211 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2019-11-06 19:05:42,211 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:05:42,211 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2019-11-06 19:05:42,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991109961] [2019-11-06 19:05:42,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:05:42,213 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:42,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:05:42,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:05:42,213 INFO L87 Difference]: Start difference. First operand 2863 states and 3526 transitions. Second operand 5 states. [2019-11-06 19:05:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:43,211 INFO L93 Difference]: Finished difference Result 5881 states and 7248 transitions. [2019-11-06 19:05:43,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:05:43,212 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 230 [2019-11-06 19:05:43,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:43,225 INFO L225 Difference]: With dead ends: 5881 [2019-11-06 19:05:43,225 INFO L226 Difference]: Without dead ends: 3024 [2019-11-06 19:05:43,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:05:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2019-11-06 19:05:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 2873. [2019-11-06 19:05:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2873 states. [2019-11-06 19:05:43,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2873 states to 2873 states and 3540 transitions. [2019-11-06 19:05:43,332 INFO L78 Accepts]: Start accepts. Automaton has 2873 states and 3540 transitions. Word has length 230 [2019-11-06 19:05:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:43,332 INFO L462 AbstractCegarLoop]: Abstraction has 2873 states and 3540 transitions. [2019-11-06 19:05:43,332 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:05:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2873 states and 3540 transitions. [2019-11-06 19:05:43,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-11-06 19:05:43,343 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:43,343 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 19:05:43,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:43,547 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:43,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:43,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1494032993, now seen corresponding path program 1 times [2019-11-06 19:05:43,548 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:43,548 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817998987] [2019-11-06 19:05:43,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:43,875 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 286 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-06 19:05:43,876 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817998987] [2019-11-06 19:05:43,876 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599155953] [2019-11-06 19:05:43,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:44,022 INFO L256 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:05:44,029 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 288 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 19:05:44,219 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:05:44,220 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:05:44,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962100096] [2019-11-06 19:05:44,221 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:05:44,221 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:44,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:05:44,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:05:44,222 INFO L87 Difference]: Start difference. First operand 2873 states and 3540 transitions. Second operand 11 states. [2019-11-06 19:05:46,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:46,958 INFO L93 Difference]: Finished difference Result 6343 states and 8386 transitions. [2019-11-06 19:05:46,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 19:05:46,959 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 301 [2019-11-06 19:05:46,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:46,982 INFO L225 Difference]: With dead ends: 6343 [2019-11-06 19:05:46,982 INFO L226 Difference]: Without dead ends: 3619 [2019-11-06 19:05:46,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-11-06 19:05:46,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2019-11-06 19:05:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3432. [2019-11-06 19:05:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3432 states. [2019-11-06 19:05:47,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3432 states to 3432 states and 4591 transitions. [2019-11-06 19:05:47,115 INFO L78 Accepts]: Start accepts. Automaton has 3432 states and 4591 transitions. Word has length 301 [2019-11-06 19:05:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:47,116 INFO L462 AbstractCegarLoop]: Abstraction has 3432 states and 4591 transitions. [2019-11-06 19:05:47,116 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:05:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3432 states and 4591 transitions. [2019-11-06 19:05:47,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2019-11-06 19:05:47,128 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:47,129 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:05:47,332 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:47,332 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1693644177, now seen corresponding path program 1 times [2019-11-06 19:05:47,333 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:47,333 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492569362] [2019-11-06 19:05:47,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:47,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 4 proven. 387 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:05:48,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492569362] [2019-11-06 19:05:48,437 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729751596] [2019-11-06 19:05:48,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:48,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 19:05:48,552 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:48,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:48,590 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:48,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:48,591 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:48,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:48,596 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:48,598 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:48,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms