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_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:01,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:01,753 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:01,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:01,771 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:01,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:01,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:01,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:01,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:01,788 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:01,789 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:01,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:01,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:01,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:01,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:01,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:01,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:01,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:01,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:01,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:01,802 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:01,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:01,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:01,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:01,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:01,815 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:01,816 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:01,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:01,817 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:01,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:01,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:01,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:01,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:01,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:01,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:01,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:01,828 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 [2019-10-13 18:03:01,848 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:01,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:01,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:01,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:01,851 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:01,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:01,852 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:01,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:01,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:01,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:01,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:01,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:01,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:01,854 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:01,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:01,855 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:01,855 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:01,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:01,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:01,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:01,856 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:01,856 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:01,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:01,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:01,857 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:01,857 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:01,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:01,857 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:01,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:02,133 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:02,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:02,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:02,154 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:02,154 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:02,155 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-10-13 18:03:02,222 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/672f206ed/446ac7dc9bde4502ad344977dc566ec5/FLAGbc1ddd67d [2019-10-13 18:03:02,801 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:02,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label37.c [2019-10-13 18:03:02,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/672f206ed/446ac7dc9bde4502ad344977dc566ec5/FLAGbc1ddd67d [2019-10-13 18:03:03,064 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/672f206ed/446ac7dc9bde4502ad344977dc566ec5 [2019-10-13 18:03:03,074 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:03,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:03,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:03,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:03,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:03,080 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:03,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70dea371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03, skipping insertion in model container [2019-10-13 18:03:03,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:03,091 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:03,151 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:03,738 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:03,744 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:03,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:03,888 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:03,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03 WrapperNode [2019-10-13 18:03:03,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:03,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:03,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:03,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:03,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:03,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:03,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:03,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:03,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:04,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:04,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (1/1) ... [2019-10-13 18:03:04,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:04,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:04,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:04,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:04,040 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:04,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:04,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:04,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:04,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:04,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:05,564 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:05,565 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:05,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:05 BoogieIcfgContainer [2019-10-13 18:03:05,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:05,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:05,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:05,570 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:05,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:03" (1/3) ... [2019-10-13 18:03:05,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413a1c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:05, skipping insertion in model container [2019-10-13 18:03:05,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:03" (2/3) ... [2019-10-13 18:03:05,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@413a1c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:05, skipping insertion in model container [2019-10-13 18:03:05,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:05" (3/3) ... [2019-10-13 18:03:05,574 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label37.c [2019-10-13 18:03:05,584 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:05,592 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:05,603 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:05,638 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:05,639 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:05,640 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:05,640 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:05,641 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:05,641 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:05,641 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:05,641 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:05,671 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:05,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 18:03:05,679 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:05,680 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] [2019-10-13 18:03:05,682 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash -803708109, now seen corresponding path program 1 times [2019-10-13 18:03:05,698 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:05,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014065031] [2019-10-13 18:03:05,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:05,699 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:05,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:06,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014065031] [2019-10-13 18:03:06,090 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:06,090 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:06,090 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009113457] [2019-10-13 18:03:06,095 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:06,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:06,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:06,113 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:08,610 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:03:08,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:08,616 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-13 18:03:08,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:08,636 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:03:08,637 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:08,647 INFO L600 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 [2019-10-13 18:03:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:08,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:03:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:03:08,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:03:08,748 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 24 [2019-10-13 18:03:08,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:08,748 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:03:08,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:08,749 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:03:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 18:03:08,754 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:08,754 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:03:08,755 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:08,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1307539406, now seen corresponding path program 1 times [2019-10-13 18:03:08,755 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:08,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308531633] [2019-10-13 18:03:08,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:08,756 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:08,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:09,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308531633] [2019-10-13 18:03:09,027 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:09,027 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:03:09,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484696558] [2019-10-13 18:03:09,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:09,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:09,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:09,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:09,030 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:03:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:10,909 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-13 18:03:10,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:03:10,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 98 [2019-10-13 18:03:10,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:10,915 INFO L225 Difference]: With dead ends: 1320 [2019-10-13 18:03:10,916 INFO L226 Difference]: Without dead ends: 768 [2019-10-13 18:03:10,918 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-13 18:03:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-13 18:03:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-13 18:03:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-13 18:03:10,954 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 98 [2019-10-13 18:03:10,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:10,955 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-13 18:03:10,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:10,955 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-13 18:03:10,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 18:03:10,958 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:10,959 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:03:10,959 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:10,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1750148479, now seen corresponding path program 1 times [2019-10-13 18:03:10,960 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:10,960 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921029071] [2019-10-13 18:03:10,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:10,960 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:10,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:11,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921029071] [2019-10-13 18:03:11,150 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435483083] [2019-10-13 18:03:11,151 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 [2019-10-13 18:03:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:11,242 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:11,303 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:11,303 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:11,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508037428] [2019-10-13 18:03:11,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:11,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:11,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:11,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:11,305 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-13 18:03:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:12,154 INFO L93 Difference]: Finished difference Result 1676 states and 2459 transitions. [2019-10-13 18:03:12,155 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:12,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 107 [2019-10-13 18:03:12,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:12,161 INFO L225 Difference]: With dead ends: 1676 [2019-10-13 18:03:12,161 INFO L226 Difference]: Without dead ends: 1116 [2019-10-13 18:03:12,163 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:12,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2019-10-13 18:03:12,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 932. [2019-10-13 18:03:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2019-10-13 18:03:12,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1275 transitions. [2019-10-13 18:03:12,195 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1275 transitions. Word has length 107 [2019-10-13 18:03:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:12,196 INFO L462 AbstractCegarLoop]: Abstraction has 932 states and 1275 transitions. [2019-10-13 18:03:12,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1275 transitions. [2019-10-13 18:03:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-13 18:03:12,203 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:12,204 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:12,409 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:12,410 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:12,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:12,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1588575235, now seen corresponding path program 1 times [2019-10-13 18:03:12,412 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:12,412 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286696902] [2019-10-13 18:03:12,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:12,412 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:12,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,754 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:03:12,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286696902] [2019-10-13 18:03:12,755 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631322768] [2019-10-13 18:03:12,755 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 [2019-10-13 18:03:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,884 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:12,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-13 18:03:12,966 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:12,966 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:12,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367108285] [2019-10-13 18:03:12,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:12,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:12,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:12,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:12,971 INFO L87 Difference]: Start difference. First operand 932 states and 1275 transitions. Second operand 3 states. [2019-10-13 18:03:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:13,789 INFO L93 Difference]: Finished difference Result 2412 states and 3390 transitions. [2019-10-13 18:03:13,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:13,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 210 [2019-10-13 18:03:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:13,803 INFO L225 Difference]: With dead ends: 2412 [2019-10-13 18:03:13,803 INFO L226 Difference]: Without dead ends: 1486 [2019-10-13 18:03:13,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:13,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-13 18:03:13,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1302. [2019-10-13 18:03:13,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-10-13 18:03:13,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1746 transitions. [2019-10-13 18:03:13,870 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1746 transitions. Word has length 210 [2019-10-13 18:03:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:13,872 INFO L462 AbstractCegarLoop]: Abstraction has 1302 states and 1746 transitions. [2019-10-13 18:03:13,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1746 transitions. [2019-10-13 18:03:13,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-13 18:03:13,881 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:13,882 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:14,085 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:14,087 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:14,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:14,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1682277713, now seen corresponding path program 1 times [2019-10-13 18:03:14,088 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:14,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79584445] [2019-10-13 18:03:14,089 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:14,089 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:14,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:03:14,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79584445] [2019-10-13 18:03:14,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992399072] [2019-10-13 18:03:14,348 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 [2019-10-13 18:03:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:14,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:14,477 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:03:14,477 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:14,477 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2019-10-13 18:03:14,478 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542237142] [2019-10-13 18:03:14,478 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:14,478 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:14,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:14,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:14,479 INFO L87 Difference]: Start difference. First operand 1302 states and 1746 transitions. Second operand 3 states. [2019-10-13 18:03:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:15,313 INFO L93 Difference]: Finished difference Result 3702 states and 5056 transitions. [2019-10-13 18:03:15,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:15,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2019-10-13 18:03:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:15,327 INFO L225 Difference]: With dead ends: 3702 [2019-10-13 18:03:15,327 INFO L226 Difference]: Without dead ends: 2406 [2019-10-13 18:03:15,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2019-10-13 18:03:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 2224. [2019-10-13 18:03:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2224 states. [2019-10-13 18:03:15,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2224 states to 2224 states and 2933 transitions. [2019-10-13 18:03:15,395 INFO L78 Accepts]: Start accepts. Automaton has 2224 states and 2933 transitions. Word has length 216 [2019-10-13 18:03:15,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:15,396 INFO L462 AbstractCegarLoop]: Abstraction has 2224 states and 2933 transitions. [2019-10-13 18:03:15,396 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:15,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2224 states and 2933 transitions. [2019-10-13 18:03:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-10-13 18:03:15,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:15,401 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:15,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:15,605 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1807502101, now seen corresponding path program 1 times [2019-10-13 18:03:15,605 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:15,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373078702] [2019-10-13 18:03:15,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:15,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:15,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:03:15,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373078702] [2019-10-13 18:03:15,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422325344] [2019-10-13 18:03:15,807 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 [2019-10-13 18:03:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:15,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-13 18:03:16,034 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:16,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:03:16,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831326823] [2019-10-13 18:03:16,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:16,035 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:16,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:16,036 INFO L87 Difference]: Start difference. First operand 2224 states and 2933 transitions. Second operand 3 states. [2019-10-13 18:03:16,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:16,915 INFO L93 Difference]: Finished difference Result 5180 states and 6986 transitions. [2019-10-13 18:03:16,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:16,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 230 [2019-10-13 18:03:16,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:16,930 INFO L225 Difference]: With dead ends: 5180 [2019-10-13 18:03:16,930 INFO L226 Difference]: Without dead ends: 2962 [2019-10-13 18:03:16,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2019-10-13 18:03:17,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2780. [2019-10-13 18:03:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2780 states. [2019-10-13 18:03:17,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2780 states to 2780 states and 3722 transitions. [2019-10-13 18:03:17,012 INFO L78 Accepts]: Start accepts. Automaton has 2780 states and 3722 transitions. Word has length 230 [2019-10-13 18:03:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:17,013 INFO L462 AbstractCegarLoop]: Abstraction has 2780 states and 3722 transitions. [2019-10-13 18:03:17,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2780 states and 3722 transitions. [2019-10-13 18:03:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-13 18:03:17,020 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:17,021 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:17,224 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:17,225 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:17,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:17,225 INFO L82 PathProgramCache]: Analyzing trace with hash 710456757, now seen corresponding path program 1 times [2019-10-13 18:03:17,226 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:17,226 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923883637] [2019-10-13 18:03:17,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:17,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:17,227 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:17,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 143 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:18,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923883637] [2019-10-13 18:03:18,010 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037754748] [2019-10-13 18:03:18,010 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 [2019-10-13 18:03:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:18,114 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:18,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:18,158 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 18:03:18,297 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:18,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2019-10-13 18:03:18,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100628513] [2019-10-13 18:03:18,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:18,299 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:18,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:18,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:18,299 INFO L87 Difference]: Start difference. First operand 2780 states and 3722 transitions. Second operand 5 states. [2019-10-13 18:03:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:19,709 INFO L93 Difference]: Finished difference Result 6146 states and 8216 transitions. [2019-10-13 18:03:19,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:19,710 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-10-13 18:03:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:19,724 INFO L225 Difference]: With dead ends: 6146 [2019-10-13 18:03:19,725 INFO L226 Difference]: Without dead ends: 3372 [2019-10-13 18:03:19,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:19,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2019-10-13 18:03:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3184. [2019-10-13 18:03:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3184 states. [2019-10-13 18:03:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3184 states to 3184 states and 4185 transitions. [2019-10-13 18:03:19,810 INFO L78 Accepts]: Start accepts. Automaton has 3184 states and 4185 transitions. Word has length 278 [2019-10-13 18:03:19,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:19,811 INFO L462 AbstractCegarLoop]: Abstraction has 3184 states and 4185 transitions. [2019-10-13 18:03:19,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3184 states and 4185 transitions. [2019-10-13 18:03:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2019-10-13 18:03:19,821 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:19,822 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:20,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:20,025 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:20,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:20,026 INFO L82 PathProgramCache]: Analyzing trace with hash -987748772, now seen corresponding path program 1 times [2019-10-13 18:03:20,026 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:20,026 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496846004] [2019-10-13 18:03:20,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:20,027 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:20,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:21,124 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 61 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:21,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496846004] [2019-10-13 18:03:21,125 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645252931] [2019-10-13 18:03:21,125 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 [2019-10-13 18:03:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:21,229 INFO L256 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:21,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:21,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 260 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 18:03:21,535 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:21,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:21,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802592905] [2019-10-13 18:03:21,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:21,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:21,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:21,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:21,537 INFO L87 Difference]: Start difference. First operand 3184 states and 4185 transitions. Second operand 16 states. [2019-10-13 18:03:25,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:25,605 INFO L93 Difference]: Finished difference Result 6682 states and 8813 transitions. [2019-10-13 18:03:25,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:03:25,605 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 362 [2019-10-13 18:03:25,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:25,624 INFO L225 Difference]: With dead ends: 6682 [2019-10-13 18:03:25,624 INFO L226 Difference]: Without dead ends: 3457 [2019-10-13 18:03:25,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:03:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2019-10-13 18:03:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3382. [2019-10-13 18:03:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3382 states. [2019-10-13 18:03:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 4139 transitions. [2019-10-13 18:03:25,713 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 4139 transitions. Word has length 362 [2019-10-13 18:03:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:25,713 INFO L462 AbstractCegarLoop]: Abstraction has 3382 states and 4139 transitions. [2019-10-13 18:03:25,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 4139 transitions. [2019-10-13 18:03:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2019-10-13 18:03:25,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:25,724 INFO L380 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:03:25,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:25,928 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:25,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:25,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1145133969, now seen corresponding path program 1 times [2019-10-13 18:03:25,929 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:25,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673592552] [2019-10-13 18:03:25,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:26,640 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 122 proven. 252 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:26,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673592552] [2019-10-13 18:03:26,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326231769] [2019-10-13 18:03:26,640 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 [2019-10-13 18:03:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:26,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:26,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:26,797 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:03:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 233 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-13 18:03:26,907 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:26,907 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-13 18:03:26,907 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366464125] [2019-10-13 18:03:26,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:26,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:26,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:26,909 INFO L87 Difference]: Start difference. First operand 3382 states and 4139 transitions. Second operand 5 states. [2019-10-13 18:03:28,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:28,015 INFO L93 Difference]: Finished difference Result 7318 states and 9006 transitions. [2019-10-13 18:03:28,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:28,016 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 387 [2019-10-13 18:03:28,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:28,029 INFO L225 Difference]: With dead ends: 7318 [2019-10-13 18:03:28,029 INFO L226 Difference]: Without dead ends: 3942 [2019-10-13 18:03:28,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:28,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2019-10-13 18:03:28,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3940. [2019-10-13 18:03:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3940 states. [2019-10-13 18:03:28,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 4829 transitions. [2019-10-13 18:03:28,126 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 4829 transitions. Word has length 387 [2019-10-13 18:03:28,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:28,127 INFO L462 AbstractCegarLoop]: Abstraction has 3940 states and 4829 transitions. [2019-10-13 18:03:28,127 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:28,127 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 4829 transitions. [2019-10-13 18:03:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2019-10-13 18:03:28,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:28,140 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2019-10-13 18:03:28,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:28,344 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:28,344 INFO L82 PathProgramCache]: Analyzing trace with hash -197185924, now seen corresponding path program 1 times [2019-10-13 18:03:28,345 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:28,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470332163] [2019-10-13 18:03:28,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:28,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:28,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 294 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:29,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470332163] [2019-10-13 18:03:29,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194701155] [2019-10-13 18:03:29,334 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 [2019-10-13 18:03:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:29,487 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:29,620 INFO L134 CoverageAnalysis]: Checked inductivity of 727 backedges. 601 proven. 2 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2019-10-13 18:03:29,620 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:29,620 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:03:29,621 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755186977] [2019-10-13 18:03:29,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:29,622 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:29,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:29,622 INFO L87 Difference]: Start difference. First operand 3940 states and 4829 transitions. Second operand 9 states. [2019-10-13 18:03:31,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:31,680 INFO L93 Difference]: Finished difference Result 7700 states and 9473 transitions. [2019-10-13 18:03:31,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:03:31,685 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 497 [2019-10-13 18:03:31,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:31,699 INFO L225 Difference]: With dead ends: 7700 [2019-10-13 18:03:31,699 INFO L226 Difference]: Without dead ends: 3948 [2019-10-13 18:03:31,708 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 510 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:31,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2019-10-13 18:03:31,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3944. [2019-10-13 18:03:31,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3944 states. [2019-10-13 18:03:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 4591 transitions. [2019-10-13 18:03:31,779 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 4591 transitions. Word has length 497 [2019-10-13 18:03:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:31,779 INFO L462 AbstractCegarLoop]: Abstraction has 3944 states and 4591 transitions. [2019-10-13 18:03:31,780 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:31,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 4591 transitions. [2019-10-13 18:03:31,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2019-10-13 18:03:31,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:31,795 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-10-13 18:03:32,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:32,008 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:32,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:32,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1008975267, now seen corresponding path program 1 times [2019-10-13 18:03:32,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:32,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464482048] [2019-10-13 18:03:32,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:32,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:32,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 403 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-13 18:03:33,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464482048] [2019-10-13 18:03:33,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323237584] [2019-10-13 18:03:33,596 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 [2019-10-13 18:03:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:33,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:33,807 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:33,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 789 proven. 2 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2019-10-13 18:03:34,173 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:34,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:34,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70105192] [2019-10-13 18:03:34,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:34,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:34,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:34,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:34,175 INFO L87 Difference]: Start difference. First operand 3944 states and 4591 transitions. Second operand 12 states. [2019-10-13 18:03:36,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:36,176 INFO L93 Difference]: Finished difference Result 7978 states and 9301 transitions. [2019-10-13 18:03:36,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:36,177 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 581 [2019-10-13 18:03:36,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:36,190 INFO L225 Difference]: With dead ends: 7978 [2019-10-13 18:03:36,191 INFO L226 Difference]: Without dead ends: 4181 [2019-10-13 18:03:36,198 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 600 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:36,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2019-10-13 18:03:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3934. [2019-10-13 18:03:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3934 states. [2019-10-13 18:03:36,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 4393 transitions. [2019-10-13 18:03:36,271 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 4393 transitions. Word has length 581 [2019-10-13 18:03:36,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:36,272 INFO L462 AbstractCegarLoop]: Abstraction has 3934 states and 4393 transitions. [2019-10-13 18:03:36,272 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:36,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 4393 transitions. [2019-10-13 18:03:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2019-10-13 18:03:36,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:36,281 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 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] [2019-10-13 18:03:36,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:36,495 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:36,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:36,495 INFO L82 PathProgramCache]: Analyzing trace with hash -933201137, now seen corresponding path program 2 times [2019-10-13 18:03:36,496 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:36,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191078228] [2019-10-13 18:03:36,496 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:36,497 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:36,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:36,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:37,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 626 proven. 236 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-10-13 18:03:37,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191078228] [2019-10-13 18:03:37,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725647323] [2019-10-13 18:03:37,434 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-13 18:03:37,597 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:03:37,597 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:03:37,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 900 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:37,610 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:37,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 841 proven. 2 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2019-10-13 18:03:38,141 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:38,141 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:03:38,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881705727] [2019-10-13 18:03:38,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:03:38,148 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:38,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:03:38,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:38,149 INFO L87 Difference]: Start difference. First operand 3934 states and 4393 transitions. Second operand 17 states.