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/Problem14_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:54,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:54,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:54,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:01:54,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:01:54,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:01:54,395 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:01:54,397 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:01:54,398 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:01:54,399 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:01:54,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:01:54,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:01:54,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:54,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:54,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:54,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:54,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:54,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:54,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:54,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:54,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:54,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:54,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:54,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:54,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:54,426 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:01:54,428 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:01:54,430 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:01:54,430 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:01:54,434 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:01:54,434 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:01:54,435 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:01:54,435 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:01:54,435 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:54,436 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:54,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:54,440 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 [2019-10-14 22:01:54,459 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:54,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:54,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:54,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:54,462 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:54,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:54,462 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:54,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:54,463 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:54,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:54,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:54,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:54,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:54,465 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:54,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:54,465 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:54,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:54,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:54,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:54,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:54,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:54,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:54,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:54,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:54,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:54,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:54,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:54,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:54,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:54,752 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:54,774 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:54,778 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:54,780 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:54,780 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:54,781 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label32.c [2019-10-14 22:01:54,860 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c449647/89cc1a3c216f4bd39f152663493be0d8/FLAG801b50e45 [2019-10-14 22:01:55,450 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:55,451 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label32.c [2019-10-14 22:01:55,468 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c449647/89cc1a3c216f4bd39f152663493be0d8/FLAG801b50e45 [2019-10-14 22:01:55,713 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07c449647/89cc1a3c216f4bd39f152663493be0d8 [2019-10-14 22:01:55,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:55,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:55,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:55,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:55,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:55,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:55" (1/1) ... [2019-10-14 22:01:55,739 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ddb9b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:55, skipping insertion in model container [2019-10-14 22:01:55,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:55" (1/1) ... [2019-10-14 22:01:55,749 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:55,814 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:56,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:56,475 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:56,599 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:56,619 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:56,620 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56 WrapperNode [2019-10-14 22:01:56,621 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:56,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:56,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:56,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:56,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (1/1) ... [2019-10-14 22:01:56,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (1/1) ... [2019-10-14 22:01:56,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (1/1) ... [2019-10-14 22:01:56,674 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (1/1) ... [2019-10-14 22:01:56,730 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (1/1) ... [2019-10-14 22:01:56,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (1/1) ... [2019-10-14 22:01:56,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (1/1) ... [2019-10-14 22:01:56,779 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:56,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:56,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:56,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:56,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (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 [2019-10-14 22:01:56,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:56,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:56,883 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:56,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:56,884 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:56,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:56,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:56,886 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:56,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:56,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:56,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:58,757 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:58,757 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:58,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:58 BoogieIcfgContainer [2019-10-14 22:01:58,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:58,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:58,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:58,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:58,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:55" (1/3) ... [2019-10-14 22:01:58,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be9405e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:58, skipping insertion in model container [2019-10-14 22:01:58,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:56" (2/3) ... [2019-10-14 22:01:58,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6be9405e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:58, skipping insertion in model container [2019-10-14 22:01:58,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:58" (3/3) ... [2019-10-14 22:01:58,780 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label32.c [2019-10-14 22:01:58,793 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:58,804 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:58,817 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:58,853 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:58,854 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:58,854 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:58,854 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:58,855 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:58,855 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:58,855 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:58,855 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:58,880 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:58,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 22:01:58,889 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:58,890 INFO L380 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] [2019-10-14 22:01:58,892 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:58,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:58,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1416126934, now seen corresponding path program 1 times [2019-10-14 22:01:58,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:58,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800477169] [2019-10-14 22:01:58,907 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:58,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:58,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:59,303 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800477169] [2019-10-14 22:01:59,304 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:59,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:59,305 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100491805] [2019-10-14 22:01:59,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:59,311 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:59,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:59,332 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:02,191 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-14 22:02:02,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:02,193 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-10-14 22:02:02,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:02,214 INFO L225 Difference]: With dead ends: 902 [2019-10-14 22:02:02,214 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:02,225 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:02,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-14 22:02:02,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-14 22:02:02,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-10-14 22:02:02,358 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 61 [2019-10-14 22:02:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:02,360 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-10-14 22:02:02,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-10-14 22:02:02,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 22:02:02,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:02,386 INFO L380 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] [2019-10-14 22:02:02,386 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:02,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:02,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1588363546, now seen corresponding path program 1 times [2019-10-14 22:02:02,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:02,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561329082] [2019-10-14 22:02:02,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:02,390 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:02,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:02,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561329082] [2019-10-14 22:02:02,739 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846106009] [2019-10-14 22:02:02,739 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 [2019-10-14 22:02:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:02,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:02,861 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:03,014 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:03,014 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:03,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:03,015 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866967222] [2019-10-14 22:02:03,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:03,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:03,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:03,020 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-10-14 22:02:03,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:03,872 INFO L93 Difference]: Finished difference Result 1666 states and 2356 transitions. [2019-10-14 22:02:03,876 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:03,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-14 22:02:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:03,886 INFO L225 Difference]: With dead ends: 1666 [2019-10-14 22:02:03,886 INFO L226 Difference]: Without dead ends: 1112 [2019-10-14 22:02:03,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:03,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-14 22:02:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-14 22:02:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-14 22:02:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1475 transitions. [2019-10-14 22:02:03,941 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1475 transitions. Word has length 173 [2019-10-14 22:02:03,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:03,942 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1475 transitions. [2019-10-14 22:02:03,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:03,942 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1475 transitions. [2019-10-14 22:02:03,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-14 22:02:03,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:03,947 INFO L380 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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:04,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:04,152 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:04,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:04,153 INFO L82 PathProgramCache]: Analyzing trace with hash -718358079, now seen corresponding path program 1 times [2019-10-14 22:02:04,154 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:04,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005094248] [2019-10-14 22:02:04,155 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:04,155 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:04,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:04,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 53 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:04,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005094248] [2019-10-14 22:02:04,460 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446051561] [2019-10-14 22:02:04,460 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 [2019-10-14 22:02:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,547 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:04,564 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:04,625 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:04,625 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:04,626 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008915523] [2019-10-14 22:02:04,626 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:04,627 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:04,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:04,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:04,628 INFO L87 Difference]: Start difference. First operand 1112 states and 1475 transitions. Second operand 3 states. [2019-10-14 22:02:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:05,628 INFO L93 Difference]: Finished difference Result 3138 states and 4245 transitions. [2019-10-14 22:02:05,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:05,628 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2019-10-14 22:02:05,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:05,640 INFO L225 Difference]: With dead ends: 3138 [2019-10-14 22:02:05,640 INFO L226 Difference]: Without dead ends: 2032 [2019-10-14 22:02:05,644 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-10-14 22:02:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2019-10-14 22:02:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2032 states. [2019-10-14 22:02:05,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2596 transitions. [2019-10-14 22:02:05,706 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2596 transitions. Word has length 194 [2019-10-14 22:02:05,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:05,707 INFO L462 AbstractCegarLoop]: Abstraction has 2032 states and 2596 transitions. [2019-10-14 22:02:05,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:05,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2596 transitions. [2019-10-14 22:02:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-14 22:02:05,713 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:05,713 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:05,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:05,918 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:05,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:05,919 INFO L82 PathProgramCache]: Analyzing trace with hash -340998247, now seen corresponding path program 1 times [2019-10-14 22:02:05,919 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:05,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505244720] [2019-10-14 22:02:05,920 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:05,920 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:05,920 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:05,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:06,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 22:02:06,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505244720] [2019-10-14 22:02:06,397 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227567956] [2019-10-14 22:02:06,397 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 [2019-10-14 22:02:06,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:06,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:06,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:02:06,575 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:06,575 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-10-14 22:02:06,576 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517143162] [2019-10-14 22:02:06,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:06,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:06,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:06,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:06,578 INFO L87 Difference]: Start difference. First operand 2032 states and 2596 transitions. Second operand 3 states. [2019-10-14 22:02:07,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:07,546 INFO L93 Difference]: Finished difference Result 4794 states and 6291 transitions. [2019-10-14 22:02:07,547 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:07,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 246 [2019-10-14 22:02:07,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:07,562 INFO L225 Difference]: With dead ends: 4794 [2019-10-14 22:02:07,562 INFO L226 Difference]: Without dead ends: 2768 [2019-10-14 22:02:07,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2019-10-14 22:02:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2586. [2019-10-14 22:02:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2586 states. [2019-10-14 22:02:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2586 states to 2586 states and 3315 transitions. [2019-10-14 22:02:07,643 INFO L78 Accepts]: Start accepts. Automaton has 2586 states and 3315 transitions. Word has length 246 [2019-10-14 22:02:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:07,644 INFO L462 AbstractCegarLoop]: Abstraction has 2586 states and 3315 transitions. [2019-10-14 22:02:07,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2586 states and 3315 transitions. [2019-10-14 22:02:07,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-14 22:02:07,651 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:07,652 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:07,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:07,857 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:07,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1720173374, now seen corresponding path program 1 times [2019-10-14 22:02:07,858 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:07,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573734526] [2019-10-14 22:02:07,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:07,859 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:07,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:08,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573734526] [2019-10-14 22:02:08,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374173635] [2019-10-14 22:02:08,201 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 [2019-10-14 22:02:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:08,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:08,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:08,486 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 189 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:08,486 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:08,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:02:08,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487115766] [2019-10-14 22:02:08,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:02:08,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:08,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:02:08,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:02:08,490 INFO L87 Difference]: Start difference. First operand 2586 states and 3315 transitions. Second operand 11 states. [2019-10-14 22:02:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:13,597 INFO L93 Difference]: Finished difference Result 8486 states and 11872 transitions. [2019-10-14 22:02:13,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 22:02:13,602 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 255 [2019-10-14 22:02:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:13,640 INFO L225 Difference]: With dead ends: 8486 [2019-10-14 22:02:13,641 INFO L226 Difference]: Without dead ends: 5340 [2019-10-14 22:02:13,653 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 265 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:02:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5340 states. [2019-10-14 22:02:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5340 to 4322. [2019-10-14 22:02:13,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4322 states. [2019-10-14 22:02:13,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 5567 transitions. [2019-10-14 22:02:13,805 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 5567 transitions. Word has length 255 [2019-10-14 22:02:13,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:13,806 INFO L462 AbstractCegarLoop]: Abstraction has 4322 states and 5567 transitions. [2019-10-14 22:02:13,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:02:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 5567 transitions. [2019-10-14 22:02:13,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2019-10-14 22:02:13,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:13,815 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:14,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:14,020 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:14,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1461339654, now seen corresponding path program 1 times [2019-10-14 22:02:14,022 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:14,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751335638] [2019-10-14 22:02:14,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:14,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:14,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 199 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:14,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751335638] [2019-10-14 22:02:14,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853987668] [2019-10-14 22:02:14,993 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 [2019-10-14 22:02:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,111 INFO L256 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:15,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 22:02:15,185 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:15,185 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2019-10-14 22:02:15,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717326655] [2019-10-14 22:02:15,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:15,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:15,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:15,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:15,189 INFO L87 Difference]: Start difference. First operand 4322 states and 5567 transitions. Second operand 3 states. [2019-10-14 22:02:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:16,117 INFO L93 Difference]: Finished difference Result 9408 states and 12511 transitions. [2019-10-14 22:02:16,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:16,118 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 267 [2019-10-14 22:02:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:16,147 INFO L225 Difference]: With dead ends: 9408 [2019-10-14 22:02:16,148 INFO L226 Difference]: Without dead ends: 5458 [2019-10-14 22:02:16,164 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 271 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2019-10-14 22:02:16,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5082. [2019-10-14 22:02:16,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5082 states. [2019-10-14 22:02:16,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 6803 transitions. [2019-10-14 22:02:16,318 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 6803 transitions. Word has length 267 [2019-10-14 22:02:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:16,320 INFO L462 AbstractCegarLoop]: Abstraction has 5082 states and 6803 transitions. [2019-10-14 22:02:16,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:16,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 6803 transitions. [2019-10-14 22:02:16,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2019-10-14 22:02:16,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:16,333 INFO L380 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, 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] [2019-10-14 22:02:16,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:16,544 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:16,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1459182395, now seen corresponding path program 1 times [2019-10-14 22:02:16,545 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:16,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574685585] [2019-10-14 22:02:16,545 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:16,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:16,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 22:02:16,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574685585] [2019-10-14 22:02:16,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801002183] [2019-10-14 22:02:16,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:17,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:17,121 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 22:02:17,121 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:17,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:17,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017920518] [2019-10-14 22:02:17,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:17,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:17,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:17,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:17,124 INFO L87 Difference]: Start difference. First operand 5082 states and 6803 transitions. Second operand 3 states. [2019-10-14 22:02:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:17,842 INFO L93 Difference]: Finished difference Result 5084 states and 6804 transitions. [2019-10-14 22:02:17,843 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:17,843 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 284 [2019-10-14 22:02:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:17,872 INFO L225 Difference]: With dead ends: 5084 [2019-10-14 22:02:17,873 INFO L226 Difference]: Without dead ends: 5082 [2019-10-14 22:02:17,877 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 289 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:17,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2019-10-14 22:02:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 5082. [2019-10-14 22:02:18,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5082 states. [2019-10-14 22:02:18,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 6802 transitions. [2019-10-14 22:02:18,034 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 6802 transitions. Word has length 284 [2019-10-14 22:02:18,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:18,035 INFO L462 AbstractCegarLoop]: Abstraction has 5082 states and 6802 transitions. [2019-10-14 22:02:18,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:18,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 6802 transitions. [2019-10-14 22:02:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2019-10-14 22:02:18,052 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:18,053 INFO L380 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, 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] [2019-10-14 22:02:18,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:18,314 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:18,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:18,315 INFO L82 PathProgramCache]: Analyzing trace with hash 754436966, now seen corresponding path program 1 times [2019-10-14 22:02:18,315 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:18,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823796136] [2019-10-14 22:02:18,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:18,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:18,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 161 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:18,921 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823796136] [2019-10-14 22:02:18,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894541666] [2019-10-14 22:02:18,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:19,020 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:19,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:19,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 22:02:19,255 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:19,255 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-10-14 22:02:19,255 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241325729] [2019-10-14 22:02:19,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:19,256 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:19,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:19,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:19,257 INFO L87 Difference]: Start difference. First operand 5082 states and 6802 transitions. Second operand 5 states. [2019-10-14 22:02:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:20,639 INFO L93 Difference]: Finished difference Result 9824 states and 13302 transitions. [2019-10-14 22:02:20,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:20,640 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 315 [2019-10-14 22:02:20,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:20,678 INFO L225 Difference]: With dead ends: 9824 [2019-10-14 22:02:20,679 INFO L226 Difference]: Without dead ends: 5106 [2019-10-14 22:02:20,696 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 317 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2019-10-14 22:02:20,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5106 states. [2019-10-14 22:02:20,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5106 to 5098. [2019-10-14 22:02:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5098 states. [2019-10-14 22:02:20,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 6773 transitions. [2019-10-14 22:02:20,832 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 6773 transitions. Word has length 315 [2019-10-14 22:02:20,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:20,833 INFO L462 AbstractCegarLoop]: Abstraction has 5098 states and 6773 transitions. [2019-10-14 22:02:20,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:20,833 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 6773 transitions. [2019-10-14 22:02:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2019-10-14 22:02:20,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:20,853 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:02:21,059 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:21,060 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:21,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1624153950, now seen corresponding path program 1 times [2019-10-14 22:02:21,061 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:21,061 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532566315] [2019-10-14 22:02:21,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:21,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:21,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 162 proven. 130 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-14 22:02:21,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532566315] [2019-10-14 22:02:21,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310650770] [2019-10-14 22:02:21,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:21,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 192 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-14 22:02:21,897 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:21,898 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-14 22:02:21,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239002794] [2019-10-14 22:02:21,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:21,902 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:21,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:21,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:21,902 INFO L87 Difference]: Start difference. First operand 5098 states and 6773 transitions. Second operand 5 states. [2019-10-14 22:02:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:23,050 INFO L93 Difference]: Finished difference Result 8518 states and 11450 transitions. [2019-10-14 22:02:23,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:23,051 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 385 [2019-10-14 22:02:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:23,066 INFO L225 Difference]: With dead ends: 8518 [2019-10-14 22:02:23,066 INFO L226 Difference]: Without dead ends: 3792 [2019-10-14 22:02:23,082 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 387 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3792 states. [2019-10-14 22:02:23,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3792 to 3726. [2019-10-14 22:02:23,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3726 states. [2019-10-14 22:02:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3726 states to 3726 states and 4417 transitions. [2019-10-14 22:02:23,152 INFO L78 Accepts]: Start accepts. Automaton has 3726 states and 4417 transitions. Word has length 385 [2019-10-14 22:02:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:23,152 INFO L462 AbstractCegarLoop]: Abstraction has 3726 states and 4417 transitions. [2019-10-14 22:02:23,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3726 states and 4417 transitions. [2019-10-14 22:02:23,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 400 [2019-10-14 22:02:23,164 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:23,164 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:23,368 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:23,368 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1426525150, now seen corresponding path program 1 times [2019-10-14 22:02:23,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:23,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223092768] [2019-10-14 22:02:23,370 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 172 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:24,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223092768] [2019-10-14 22:02:24,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824653943] [2019-10-14 22:02:24,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:24,569 INFO L256 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:24,577 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:24,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 334 proven. 53 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 22:02:24,874 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:24,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:24,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682079544] [2019-10-14 22:02:24,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:24,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:24,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:24,876 INFO L87 Difference]: Start difference. First operand 3726 states and 4417 transitions. Second operand 16 states. [2019-10-14 22:02:28,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:28,699 INFO L93 Difference]: Finished difference Result 7359 states and 8769 transitions. [2019-10-14 22:02:28,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:02:28,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 399 [2019-10-14 22:02:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:28,711 INFO L225 Difference]: With dead ends: 7359 [2019-10-14 22:02:28,711 INFO L226 Difference]: Without dead ends: 3958 [2019-10-14 22:02:28,719 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:02:28,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3958 states. [2019-10-14 22:02:28,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3958 to 3916. [2019-10-14 22:02:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3916 states. [2019-10-14 22:02:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 4433 transitions. [2019-10-14 22:02:28,789 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 4433 transitions. Word has length 399 [2019-10-14 22:02:28,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:28,789 INFO L462 AbstractCegarLoop]: Abstraction has 3916 states and 4433 transitions. [2019-10-14 22:02:28,790 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:28,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 4433 transitions. [2019-10-14 22:02:28,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 425 [2019-10-14 22:02:28,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:28,803 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:29,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:29,008 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:29,009 INFO L82 PathProgramCache]: Analyzing trace with hash -557225715, now seen corresponding path program 1 times [2019-10-14 22:02:29,010 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:29,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844614875] [2019-10-14 22:02:29,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:29,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:29,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 215 proven. 172 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 22:02:29,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844614875] [2019-10-14 22:02:29,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518163635] [2019-10-14 22:02:29,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:29,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:30,005 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:30,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:02:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 270 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-10-14 22:02:30,213 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:30,213 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-10-14 22:02:30,214 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121145187] [2019-10-14 22:02:30,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:30,215 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:30,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:30,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:30,215 INFO L87 Difference]: Start difference. First operand 3916 states and 4433 transitions. Second operand 5 states.