/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:07:55,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:07:55,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:07:55,413 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:07:55,414 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:07:55,416 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:07:55,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:07:55,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:07:55,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:07:55,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:07:55,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:07:55,434 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:07:55,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:07:55,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:07:55,437 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:07:55,438 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:07:55,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:07:55,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:07:55,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:07:55,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:07:55,444 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:07:55,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:07:55,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:07:55,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:07:55,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:07:55,449 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:07:55,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:07:55,450 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:07:55,451 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:07:55,452 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:07:55,452 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:07:55,453 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:07:55,454 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:07:55,454 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:07:55,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:07:55,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:07:55,456 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:07:55,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:07:55,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:07:55,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:07:55,458 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:07:55,459 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:07:55,473 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:07:55,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:07:55,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:07:55,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:07:55,475 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:07:55,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:07:55,476 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:07:55,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:07:55,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:07:55,476 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:07:55,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:07:55,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:07:55,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:07:55,477 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:07:55,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:07:55,477 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:07:55,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:07:55,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:07:55,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:07:55,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:07:55,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:07:55,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:55,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:07:55,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:07:55,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:07:55,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:07:55,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:07:55,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:07:55,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:07:55,765 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:07:55,787 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:07:55,791 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:07:55,792 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:07:55,792 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:07:55,793 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-11-06 19:07:55,866 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ec142236/fd88d1c3b7064b8e83128f9cd4903f76/FLAGed30fa427 [2019-11-06 19:07:56,469 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:07:56,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label12.c [2019-11-06 19:07:56,486 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ec142236/fd88d1c3b7064b8e83128f9cd4903f76/FLAGed30fa427 [2019-11-06 19:07:56,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ec142236/fd88d1c3b7064b8e83128f9cd4903f76 [2019-11-06 19:07:56,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:07:56,714 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:07:56,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:56,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:07:56,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:07:56,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:56" (1/1) ... [2019-11-06 19:07:56,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ed38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:56, skipping insertion in model container [2019-11-06 19:07:56,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:07:56" (1/1) ... [2019-11-06 19:07:56,731 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:07:56,788 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:07:57,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:57,442 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:07:57,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:07:57,625 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:07:57,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57 WrapperNode [2019-11-06 19:07:57,626 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:07:57,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:07:57,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:07:57,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:07:57,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... [2019-11-06 19:07:57,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:07:57,795 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:07:57,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:07:57,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:07:57,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:07:57,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:07:57,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:07:57,869 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:07:57,869 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:07:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:07:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:07:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:07:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:07:57,870 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:07:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:07:57,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:07:59,772 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:07:59,776 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:07:59,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:59 BoogieIcfgContainer [2019-11-06 19:07:59,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:07:59,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:07:59,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:07:59,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:07:59,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:07:56" (1/3) ... [2019-11-06 19:07:59,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a579d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:59, skipping insertion in model container [2019-11-06 19:07:59,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:07:57" (2/3) ... [2019-11-06 19:07:59,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a579d4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:07:59, skipping insertion in model container [2019-11-06 19:07:59,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:07:59" (3/3) ... [2019-11-06 19:07:59,795 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label12.c [2019-11-06 19:07:59,807 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:07:59,819 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:07:59,831 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:07:59,881 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:07:59,882 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:07:59,883 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:07:59,883 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:07:59,884 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:07:59,884 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:07:59,884 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:07:59,884 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:07:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:07:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 19:07:59,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:07:59,932 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] [2019-11-06 19:07:59,934 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:07:59,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:07:59,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1842297178, now seen corresponding path program 1 times [2019-11-06 19:07:59,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:07:59,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774514575] [2019-11-06 19:07:59,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:00,334 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 19:08:00,334 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774514575] [2019-11-06 19:08:00,335 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:00,335 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:08:00,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808634872] [2019-11-06 19:08:00,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:00,344 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:00,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:00,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:00,361 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:03,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:03,531 INFO L93 Difference]: Finished difference Result 1004 states and 1802 transitions. [2019-11-06 19:08:03,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:03,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-11-06 19:08:03,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:03,556 INFO L225 Difference]: With dead ends: 1004 [2019-11-06 19:08:03,557 INFO L226 Difference]: Without dead ends: 644 [2019-11-06 19:08:03,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 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 19:08:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-11-06 19:08:03,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 623. [2019-11-06 19:08:03,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-11-06 19:08:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 957 transitions. [2019-11-06 19:08:03,669 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 957 transitions. Word has length 31 [2019-11-06 19:08:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:03,670 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 957 transitions. [2019-11-06 19:08:03,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 957 transitions. [2019-11-06 19:08:03,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 19:08:03,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:03,680 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:03,680 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:03,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:03,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1072563117, now seen corresponding path program 1 times [2019-11-06 19:08:03,681 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:03,681 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61186210] [2019-11-06 19:08:03,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:04,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61186210] [2019-11-06 19:08:04,044 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:04,044 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:08:04,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359267022] [2019-11-06 19:08:04,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:08:04,048 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:04,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:08:04,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:04,049 INFO L87 Difference]: Start difference. First operand 623 states and 957 transitions. Second operand 7 states. [2019-11-06 19:08:06,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:06,755 INFO L93 Difference]: Finished difference Result 1867 states and 2956 transitions. [2019-11-06 19:08:06,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:08:06,756 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 106 [2019-11-06 19:08:06,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:06,765 INFO L225 Difference]: With dead ends: 1867 [2019-11-06 19:08:06,765 INFO L226 Difference]: Without dead ends: 1250 [2019-11-06 19:08:06,769 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:08:06,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2019-11-06 19:08:06,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1020. [2019-11-06 19:08:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2019-11-06 19:08:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1452 transitions. [2019-11-06 19:08:06,856 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1452 transitions. Word has length 106 [2019-11-06 19:08:06,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:06,857 INFO L462 AbstractCegarLoop]: Abstraction has 1020 states and 1452 transitions. [2019-11-06 19:08:06,858 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:08:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1452 transitions. [2019-11-06 19:08:06,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 19:08:06,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:06,869 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:06,869 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash -329605510, now seen corresponding path program 1 times [2019-11-06 19:08:06,870 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:06,871 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555796095] [2019-11-06 19:08:06,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:07,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:07,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555796095] [2019-11-06 19:08:07,209 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:07,209 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:08:07,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3091331] [2019-11-06 19:08:07,212 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:07,212 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:07,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:07,213 INFO L87 Difference]: Start difference. First operand 1020 states and 1452 transitions. Second operand 8 states. [2019-11-06 19:08:10,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:10,034 INFO L93 Difference]: Finished difference Result 3063 states and 4491 transitions. [2019-11-06 19:08:10,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:08:10,035 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 119 [2019-11-06 19:08:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:10,050 INFO L225 Difference]: With dead ends: 3063 [2019-11-06 19:08:10,051 INFO L226 Difference]: Without dead ends: 2049 [2019-11-06 19:08:10,054 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2019-11-06 19:08:10,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1822. [2019-11-06 19:08:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-11-06 19:08:10,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2445 transitions. [2019-11-06 19:08:10,174 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2445 transitions. Word has length 119 [2019-11-06 19:08:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:10,175 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2445 transitions. [2019-11-06 19:08:10,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2445 transitions. [2019-11-06 19:08:10,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-11-06 19:08:10,179 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:10,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:08:10,180 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:10,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:10,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1681837426, now seen corresponding path program 1 times [2019-11-06 19:08:10,181 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:10,181 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302539348] [2019-11-06 19:08:10,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:10,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302539348] [2019-11-06 19:08:10,454 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167506540] [2019-11-06 19:08:10,454 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 19:08:10,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:10,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:10,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:10,618 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:10,618 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-06 19:08:10,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607221221] [2019-11-06 19:08:10,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:10,619 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:10,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:10,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:10,620 INFO L87 Difference]: Start difference. First operand 1822 states and 2445 transitions. Second operand 3 states. [2019-11-06 19:08:11,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:11,939 INFO L93 Difference]: Finished difference Result 4442 states and 6217 transitions. [2019-11-06 19:08:11,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:11,940 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 162 [2019-11-06 19:08:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:11,959 INFO L225 Difference]: With dead ends: 4442 [2019-11-06 19:08:11,959 INFO L226 Difference]: Without dead ends: 2814 [2019-11-06 19:08:11,964 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:11,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2019-11-06 19:08:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2809. [2019-11-06 19:08:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2809 states. [2019-11-06 19:08:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3803 transitions. [2019-11-06 19:08:12,049 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3803 transitions. Word has length 162 [2019-11-06 19:08:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:12,051 INFO L462 AbstractCegarLoop]: Abstraction has 2809 states and 3803 transitions. [2019-11-06 19:08:12,051 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3803 transitions. [2019-11-06 19:08:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-06 19:08:12,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:12,056 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:12,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:12,261 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:12,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1420666926, now seen corresponding path program 1 times [2019-11-06 19:08:12,261 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:12,262 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451415597] [2019-11-06 19:08:12,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:12,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451415597] [2019-11-06 19:08:12,601 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308366279] [2019-11-06 19:08:12,601 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 19:08:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:12,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:08:12,708 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:12,825 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:12,826 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-11-06 19:08:12,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560838396] [2019-11-06 19:08:12,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:08:12,827 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:08:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:08:12,828 INFO L87 Difference]: Start difference. First operand 2809 states and 3803 transitions. Second operand 9 states. [2019-11-06 19:08:15,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:15,211 INFO L93 Difference]: Finished difference Result 5448 states and 7595 transitions. [2019-11-06 19:08:15,211 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:08:15,211 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 187 [2019-11-06 19:08:15,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:15,230 INFO L225 Difference]: With dead ends: 5448 [2019-11-06 19:08:15,230 INFO L226 Difference]: Without dead ends: 2833 [2019-11-06 19:08:15,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:15,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2019-11-06 19:08:15,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2788. [2019-11-06 19:08:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2788 states. [2019-11-06 19:08:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 3468 transitions. [2019-11-06 19:08:15,340 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 3468 transitions. Word has length 187 [2019-11-06 19:08:15,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:15,341 INFO L462 AbstractCegarLoop]: Abstraction has 2788 states and 3468 transitions. [2019-11-06 19:08:15,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:08:15,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 3468 transitions. [2019-11-06 19:08:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-11-06 19:08:15,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:15,348 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:15,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:15,553 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:15,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:15,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1590808865, now seen corresponding path program 1 times [2019-11-06 19:08:15,553 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:15,554 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779014091] [2019-11-06 19:08:15,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:08:15,845 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779014091] [2019-11-06 19:08:15,846 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335356345] [2019-11-06 19:08:15,846 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 19:08:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:15,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:15,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:16,012 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:08:16,013 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:16,013 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-11-06 19:08:16,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596337285] [2019-11-06 19:08:16,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:16,014 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:16,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:16,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:08:16,015 INFO L87 Difference]: Start difference. First operand 2788 states and 3468 transitions. Second operand 3 states. [2019-11-06 19:08:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:16,959 INFO L93 Difference]: Finished difference Result 6145 states and 7716 transitions. [2019-11-06 19:08:16,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:16,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 192 [2019-11-06 19:08:16,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:16,975 INFO L225 Difference]: With dead ends: 6145 [2019-11-06 19:08:16,975 INFO L226 Difference]: Without dead ends: 3551 [2019-11-06 19:08:16,982 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:08:16,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2019-11-06 19:08:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 3359. [2019-11-06 19:08:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3359 states. [2019-11-06 19:08:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4181 transitions. [2019-11-06 19:08:17,064 INFO L78 Accepts]: Start accepts. Automaton has 3359 states and 4181 transitions. Word has length 192 [2019-11-06 19:08:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:17,064 INFO L462 AbstractCegarLoop]: Abstraction has 3359 states and 4181 transitions. [2019-11-06 19:08:17,065 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3359 states and 4181 transitions. [2019-11-06 19:08:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-11-06 19:08:17,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:17,072 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:17,275 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:17,277 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:17,277 INFO L82 PathProgramCache]: Analyzing trace with hash -310950367, now seen corresponding path program 1 times [2019-11-06 19:08:17,277 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:17,277 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680981541] [2019-11-06 19:08:17,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:18,084 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:18,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680981541] [2019-11-06 19:08:18,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975468413] [2019-11-06 19:08:18,086 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 19:08:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:18,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:08:18,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:18,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-06 19:08:18,365 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:18,365 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2019-11-06 19:08:18,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589227822] [2019-11-06 19:08:18,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:18,367 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:18,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:18,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:08:18,367 INFO L87 Difference]: Start difference. First operand 3359 states and 4181 transitions. Second operand 5 states. [2019-11-06 19:08:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:19,930 INFO L93 Difference]: Finished difference Result 6785 states and 8535 transitions. [2019-11-06 19:08:19,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:19,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 270 [2019-11-06 19:08:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:19,945 INFO L225 Difference]: With dead ends: 6785 [2019-11-06 19:08:19,946 INFO L226 Difference]: Without dead ends: 3620 [2019-11-06 19:08:19,953 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:08:19,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2019-11-06 19:08:20,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 3561. [2019-11-06 19:08:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3561 states. [2019-11-06 19:08:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 4404 transitions. [2019-11-06 19:08:20,047 INFO L78 Accepts]: Start accepts. Automaton has 3561 states and 4404 transitions. Word has length 270 [2019-11-06 19:08:20,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:20,049 INFO L462 AbstractCegarLoop]: Abstraction has 3561 states and 4404 transitions. [2019-11-06 19:08:20,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3561 states and 4404 transitions. [2019-11-06 19:08:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2019-11-06 19:08:20,058 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:20,058 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:20,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:20,270 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:20,271 INFO L82 PathProgramCache]: Analyzing trace with hash -725104376, now seen corresponding path program 1 times [2019-11-06 19:08:20,271 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:20,271 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614160797] [2019-11-06 19:08:20,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:20,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:20,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-11-06 19:08:20,583 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614160797] [2019-11-06 19:08:20,583 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:20,583 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:08:20,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870073453] [2019-11-06 19:08:20,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 19:08:20,584 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 19:08:20,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-06 19:08:20,585 INFO L87 Difference]: Start difference. First operand 3561 states and 4404 transitions. Second operand 6 states. [2019-11-06 19:08:23,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:23,333 INFO L93 Difference]: Finished difference Result 9057 states and 11383 transitions. [2019-11-06 19:08:23,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:23,334 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 309 [2019-11-06 19:08:23,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:23,356 INFO L225 Difference]: With dead ends: 9057 [2019-11-06 19:08:23,357 INFO L226 Difference]: Without dead ends: 5690 [2019-11-06 19:08:23,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2019-11-06 19:08:23,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4522. [2019-11-06 19:08:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4522 states. [2019-11-06 19:08:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 5511 transitions. [2019-11-06 19:08:23,481 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 5511 transitions. Word has length 309 [2019-11-06 19:08:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:23,482 INFO L462 AbstractCegarLoop]: Abstraction has 4522 states and 5511 transitions. [2019-11-06 19:08:23,482 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 19:08:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 5511 transitions. [2019-11-06 19:08:23,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-11-06 19:08:23,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:23,497 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:23,499 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:23,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:23,500 INFO L82 PathProgramCache]: Analyzing trace with hash 111570783, now seen corresponding path program 1 times [2019-11-06 19:08:23,500 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:23,500 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381796000] [2019-11-06 19:08:23,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 166 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:23,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381796000] [2019-11-06 19:08:23,990 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113678397] [2019-11-06 19:08:23,990 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 19:08:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:24,112 INFO L256 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 19:08:24,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:24,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:24,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:30,539 WARN L191 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2019-11-06 19:08:30,782 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:30,782 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:30,782 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2019-11-06 19:08:30,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079637833] [2019-11-06 19:08:30,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 19:08:30,785 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 19:08:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=193, Unknown=1, NotChecked=0, Total=240 [2019-11-06 19:08:30,786 INFO L87 Difference]: Start difference. First operand 4522 states and 5511 transitions. Second operand 16 states.