/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_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:04:38,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:04:38,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:04:38,056 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:04:38,056 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:04:38,058 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:04:38,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:04:38,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:04:38,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:04:38,076 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:04:38,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:04:38,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:04:38,081 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:04:38,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:04:38,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:04:38,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:04:38,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:04:38,092 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:04:38,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:04:38,099 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:04:38,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:04:38,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:04:38,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:04:38,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:04:38,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:04:38,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:04:38,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:04:38,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:04:38,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:04:38,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:04:38,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:04:38,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:04:38,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:04:38,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:04:38,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:04:38,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:04:38,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:04:38,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:04:38,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:04:38,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:04:38,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:04:38,114 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 19:04:38,127 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:04:38,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:04:38,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:04:38,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:04:38,129 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:04:38,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:04:38,129 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:04:38,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:04:38,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:04:38,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:04:38,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:04:38,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:04:38,130 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:04:38,131 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:04:38,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:04:38,131 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:04:38,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:04:38,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:04:38,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:04:38,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:04:38,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:04:38,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:04:38,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:04:38,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:04:38,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:04:38,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:04:38,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:04:38,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:04:38,133 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:04:38,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:04:38,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:04:38,435 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:04:38,437 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:04:38,437 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:04:38,438 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label13.c [2019-11-06 19:04:38,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e758279c7/43be39efdac6455eb53ae76a0c54b3a4/FLAG7126cfc07 [2019-11-06 19:04:39,109 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:04:39,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label13.c [2019-11-06 19:04:39,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e758279c7/43be39efdac6455eb53ae76a0c54b3a4/FLAG7126cfc07 [2019-11-06 19:04:39,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e758279c7/43be39efdac6455eb53ae76a0c54b3a4 [2019-11-06 19:04:39,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:04:39,377 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:04:39,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:04:39,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:04:39,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:04:39,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@574d774a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:39, skipping insertion in model container [2019-11-06 19:04:39,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:04:39" (1/1) ... [2019-11-06 19:04:39,392 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:04:39,443 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:04:39,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:04:39,961 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:04:40,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:04:40,104 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:04:40,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40 WrapperNode [2019-11-06 19:04:40,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:04:40,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:04:40,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:04:40,107 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:04:40,121 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (1/1) ... [2019-11-06 19:04:40,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (1/1) ... [2019-11-06 19:04:40,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (1/1) ... [2019-11-06 19:04:40,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (1/1) ... [2019-11-06 19:04:40,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (1/1) ... [2019-11-06 19:04:40,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (1/1) ... [2019-11-06 19:04:40,230 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (1/1) ... [2019-11-06 19:04:40,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:04:40,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:04:40,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:04:40,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:04:40,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (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 19:04:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:04:40,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:04:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:04:40,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:04:40,322 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:04:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:04:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:04:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:04:40,323 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:04:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:04:40,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:04:41,584 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:04:41,584 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:04:41,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:04:41 BoogieIcfgContainer [2019-11-06 19:04:41,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:04:41,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:04:41,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:04:41,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:04:41,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:04:39" (1/3) ... [2019-11-06 19:04:41,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc11191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:04:41, skipping insertion in model container [2019-11-06 19:04:41,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:04:40" (2/3) ... [2019-11-06 19:04:41,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bc11191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:04:41, skipping insertion in model container [2019-11-06 19:04:41,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:04:41" (3/3) ... [2019-11-06 19:04:41,594 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label13.c [2019-11-06 19:04:41,603 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:04:41,612 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:04:41,623 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:04:41,649 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:04:41,650 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:04:41,650 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:04:41,650 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:04:41,650 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:04:41,651 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:04:41,652 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:04:41,652 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:04:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 19:04:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 19:04:41,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:41,686 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:41,688 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:41,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:41,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1614181646, now seen corresponding path program 1 times [2019-11-06 19:04:41,703 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:41,703 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238239577] [2019-11-06 19:04:41,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:42,105 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 19:04:42,106 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238239577] [2019-11-06 19:04:42,107 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:04:42,107 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:04:42,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806273242] [2019-11-06 19:04:42,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:42,118 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:42,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:42,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:04:42,136 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-11-06 19:04:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:44,186 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-11-06 19:04:44,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:44,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-06 19:04:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:44,207 INFO L225 Difference]: With dead ends: 730 [2019-11-06 19:04:44,207 INFO L226 Difference]: Without dead ends: 447 [2019-11-06 19:04:44,215 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 19:04:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-11-06 19:04:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-11-06 19:04:44,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-11-06 19:04:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-11-06 19:04:44,301 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 61 [2019-11-06 19:04:44,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:44,302 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-11-06 19:04:44,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:44,302 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-11-06 19:04:44,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-06 19:04:44,312 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:44,313 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:44,314 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:44,314 INFO L82 PathProgramCache]: Analyzing trace with hash 562524769, now seen corresponding path program 1 times [2019-11-06 19:04:44,314 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:44,315 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158001061] [2019-11-06 19:04:44,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,822 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:44,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158001061] [2019-11-06 19:04:44,823 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611629413] [2019-11-06 19:04:44,823 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 19:04:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:44,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:04:45,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:45,130 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:04:45,130 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-11-06 19:04:45,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996777502] [2019-11-06 19:04:45,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:45,133 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:45,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:04:45,133 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 5 states. [2019-11-06 19:04:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:46,107 INFO L93 Difference]: Finished difference Result 1031 states and 1586 transitions. [2019-11-06 19:04:46,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:04:46,107 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 180 [2019-11-06 19:04:46,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:46,113 INFO L225 Difference]: With dead ends: 1031 [2019-11-06 19:04:46,113 INFO L226 Difference]: Without dead ends: 596 [2019-11-06 19:04:46,115 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:04:46,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2019-11-06 19:04:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 590. [2019-11-06 19:04:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 590 states. [2019-11-06 19:04:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 865 transitions. [2019-11-06 19:04:46,155 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 865 transitions. Word has length 180 [2019-11-06 19:04:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:46,157 INFO L462 AbstractCegarLoop]: Abstraction has 590 states and 865 transitions. [2019-11-06 19:04:46,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:04:46,157 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 865 transitions. [2019-11-06 19:04:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-06 19:04:46,165 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:46,165 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:04:46,372 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:46,373 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:46,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:46,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1013955258, now seen corresponding path program 1 times [2019-11-06 19:04:46,374 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:46,375 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59689901] [2019-11-06 19:04:46,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:46,786 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:46,787 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59689901] [2019-11-06 19:04:46,787 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:04:46,788 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-06 19:04:46,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089188869] [2019-11-06 19:04:46,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:04:46,789 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:46,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:04:46,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:04:46,790 INFO L87 Difference]: Start difference. First operand 590 states and 865 transitions. Second operand 9 states. [2019-11-06 19:04:48,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:48,839 INFO L93 Difference]: Finished difference Result 1939 states and 3010 transitions. [2019-11-06 19:04:48,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 19:04:48,840 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 187 [2019-11-06 19:04:48,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:48,851 INFO L225 Difference]: With dead ends: 1939 [2019-11-06 19:04:48,851 INFO L226 Difference]: Without dead ends: 1355 [2019-11-06 19:04:48,854 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:04:48,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2019-11-06 19:04:48,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 894. [2019-11-06 19:04:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-11-06 19:04:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1190 transitions. [2019-11-06 19:04:48,903 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1190 transitions. Word has length 187 [2019-11-06 19:04:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:48,904 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1190 transitions. [2019-11-06 19:04:48,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:04:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1190 transitions. [2019-11-06 19:04:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-11-06 19:04:48,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:48,912 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 19:04:48,913 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:48,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:48,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1373393371, now seen corresponding path program 1 times [2019-11-06 19:04:48,914 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:48,914 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321994426] [2019-11-06 19:04:48,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 175 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:04:49,492 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321994426] [2019-11-06 19:04:49,493 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186751799] [2019-11-06 19:04:49,493 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 19:04:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:49,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:49,588 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:49,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:04:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:49,740 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:04:49,740 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 15 [2019-11-06 19:04:49,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497005019] [2019-11-06 19:04:49,741 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 19:04:49,741 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 19:04:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-11-06 19:04:49,742 INFO L87 Difference]: Start difference. First operand 894 states and 1190 transitions. Second operand 15 states. [2019-11-06 19:04:54,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:54,666 INFO L93 Difference]: Finished difference Result 2114 states and 2917 transitions. [2019-11-06 19:04:54,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 19:04:54,667 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 250 [2019-11-06 19:04:54,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:54,676 INFO L225 Difference]: With dead ends: 2114 [2019-11-06 19:04:54,677 INFO L226 Difference]: Without dead ends: 1369 [2019-11-06 19:04:54,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2019-11-06 19:04:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2019-11-06 19:04:54,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1051. [2019-11-06 19:04:54,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1051 states. [2019-11-06 19:04:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1323 transitions. [2019-11-06 19:04:54,732 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1323 transitions. Word has length 250 [2019-11-06 19:04:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:54,732 INFO L462 AbstractCegarLoop]: Abstraction has 1051 states and 1323 transitions. [2019-11-06 19:04:54,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 19:04:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1323 transitions. [2019-11-06 19:04:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-11-06 19:04:54,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:54,739 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:04:54,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:54,943 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:54,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:54,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1409344854, now seen corresponding path program 1 times [2019-11-06 19:04:54,944 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:54,945 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074491928] [2019-11-06 19:04:54,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 184 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:04:55,248 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074491928] [2019-11-06 19:04:55,249 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120522891] [2019-11-06 19:04:55,249 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 19:04:55,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:55,367 INFO L256 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:04:55,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 185 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:04:55,527 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:04:55,527 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:04:55,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847821619] [2019-11-06 19:04:55,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:04:55,529 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:55,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:04:55,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:04:55,530 INFO L87 Difference]: Start difference. First operand 1051 states and 1323 transitions. Second operand 11 states. [2019-11-06 19:04:58,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:04:58,748 INFO L93 Difference]: Finished difference Result 3243 states and 4611 transitions. [2019-11-06 19:04:58,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 19:04:58,749 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 265 [2019-11-06 19:04:58,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:04:58,759 INFO L225 Difference]: With dead ends: 3243 [2019-11-06 19:04:58,759 INFO L226 Difference]: Without dead ends: 1258 [2019-11-06 19:04:58,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2019-11-06 19:04:58,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2019-11-06 19:04:58,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 1228. [2019-11-06 19:04:58,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1228 states. [2019-11-06 19:04:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1503 transitions. [2019-11-06 19:04:58,822 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1503 transitions. Word has length 265 [2019-11-06 19:04:58,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:04:58,823 INFO L462 AbstractCegarLoop]: Abstraction has 1228 states and 1503 transitions. [2019-11-06 19:04:58,823 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:04:58,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1503 transitions. [2019-11-06 19:04:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-11-06 19:04:58,829 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:04:58,829 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:04:59,033 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:04:59,033 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:04:59,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:04:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash -73832098, now seen corresponding path program 1 times [2019-11-06 19:04:59,034 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:04:59,035 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701428022] [2019-11-06 19:04:59,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:04:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,290 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 108 proven. 90 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:04:59,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701428022] [2019-11-06 19:04:59,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462320358] [2019-11-06 19:04:59,291 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 19:04:59,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:04:59,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:04:59,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:04:59,530 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 19:04:59,530 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:04:59,531 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:04:59,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165964371] [2019-11-06 19:04:59,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:04:59,532 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:04:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:04:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:04:59,532 INFO L87 Difference]: Start difference. First operand 1228 states and 1503 transitions. Second operand 5 states. [2019-11-06 19:05:00,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:05:00,243 INFO L93 Difference]: Finished difference Result 2281 states and 2775 transitions. [2019-11-06 19:05:00,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:05:00,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 275 [2019-11-06 19:05:00,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:05:00,250 INFO L225 Difference]: With dead ends: 2281 [2019-11-06 19:05:00,250 INFO L226 Difference]: Without dead ends: 1218 [2019-11-06 19:05:00,254 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 275 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:05:00,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2019-11-06 19:05:00,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1196. [2019-11-06 19:05:00,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1196 states. [2019-11-06 19:05:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1196 states to 1196 states and 1370 transitions. [2019-11-06 19:05:00,283 INFO L78 Accepts]: Start accepts. Automaton has 1196 states and 1370 transitions. Word has length 275 [2019-11-06 19:05:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:05:00,284 INFO L462 AbstractCegarLoop]: Abstraction has 1196 states and 1370 transitions. [2019-11-06 19:05:00,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:05:00,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1196 states and 1370 transitions. [2019-11-06 19:05:00,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2019-11-06 19:05:00,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:05:00,291 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:05:00,499 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:05:00,499 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:05:00,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:05:00,500 INFO L82 PathProgramCache]: Analyzing trace with hash -467387859, now seen corresponding path program 1 times [2019-11-06 19:05:00,500 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:05:00,500 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581433881] [2019-11-06 19:05:00,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:05:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 293 proven. 65 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 19:05:01,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581433881] [2019-11-06 19:05:01,887 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30876073] [2019-11-06 19:05:01,888 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 19:05:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:05:02,007 INFO L256 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 19:05:02,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:05:02,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:02,047 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:02,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:02,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:02,051 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:02,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:02,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:02,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:13,668 WARN L191 SmtUtils]: Spent 11.51 s on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2019-11-06 19:05:13,715 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:05:13,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:05:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 374 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 19:05:14,071 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:05:14,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 24 [2019-11-06 19:05:14,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742652171] [2019-11-06 19:05:14,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 19:05:14,072 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:05:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 19:05:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2019-11-06 19:05:14,073 INFO L87 Difference]: Start difference. First operand 1196 states and 1370 transitions. Second operand 24 states.