/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:42:42,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:42:42,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:42:43,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:42:43,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:42:43,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:42:43,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:42:43,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:42:43,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:42:43,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:42:43,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:42:43,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:42:43,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:42:43,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:42:43,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:42:43,024 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:42:43,026 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:42:43,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:42:43,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:42:43,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:42:43,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:42:43,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:42:43,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:42:43,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:42:43,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:42:43,053 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:42:43,054 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:42:43,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:42:43,055 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:42:43,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:42:43,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:42:43,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:42:43,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:42:43,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:42:43,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:42:43,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:42:43,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:42:43,081 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:42:43,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:42:43,084 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:42:43,084 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:42:43,085 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:42:43,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:42:43,085 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:42:43,085 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:42:43,085 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:42:43,085 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:42:43,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:42:43,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:42:43,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:42:43,087 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:42:43,088 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:42:43,088 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:42:43,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:42:43,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:42:43,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:42:43,089 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:42:43,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:42:43,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:43,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:42:43,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:42:43,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:42:43,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:42:43,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:42:43,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:42:43,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:42:43,385 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:42:43,398 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:42:43,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:42:43,403 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:42:43,403 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:42:43,404 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2019-11-06 18:42:43,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2adf65cc2/1d65c2b53d394bb8b705b09271139dcd/FLAG4d3be70e9 [2019-11-06 18:42:43,949 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:42:43,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2019-11-06 18:42:43,956 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2adf65cc2/1d65c2b53d394bb8b705b09271139dcd/FLAG4d3be70e9 [2019-11-06 18:42:44,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2adf65cc2/1d65c2b53d394bb8b705b09271139dcd [2019-11-06 18:42:44,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:42:44,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:42:44,344 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:44,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:42:44,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:42:44,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,352 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1172a0d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44, skipping insertion in model container [2019-11-06 18:42:44,352 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,359 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:42:44,378 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:42:44,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:44,598 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:42:44,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:42:44,643 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:42:44,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44 WrapperNode [2019-11-06 18:42:44,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:42:44,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:42:44,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:42:44,644 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:42:44,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,746 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (1/1) ... [2019-11-06 18:42:44,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:42:44,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:42:44,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:42:44,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:42:44,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:42:44,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:42:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:42:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:42:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:42:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:42:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:42:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:42:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:42:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:42:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:42:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:42:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:42:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:42:45,105 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:42:45,105 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-06 18:42:45,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:45 BoogieIcfgContainer [2019-11-06 18:42:45,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:42:45,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:42:45,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:42:45,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:42:45,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:42:44" (1/3) ... [2019-11-06 18:42:45,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765ee27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:45, skipping insertion in model container [2019-11-06 18:42:45,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:42:44" (2/3) ... [2019-11-06 18:42:45,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765ee27a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:42:45, skipping insertion in model container [2019-11-06 18:42:45,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:42:45" (3/3) ... [2019-11-06 18:42:45,134 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-2.i [2019-11-06 18:42:45,146 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:42:45,161 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:42:45,181 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:42:45,204 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:42:45,205 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:42:45,205 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:42:45,205 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:42:45,205 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:42:45,205 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:42:45,205 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:42:45,205 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:42:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2019-11-06 18:42:45,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:42:45,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:45,226 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:45,228 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2019-11-06 18:42:45,240 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:45,240 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645855425] [2019-11-06 18:42:45,240 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:45,413 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645855425] [2019-11-06 18:42:45,414 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:45,414 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:42:45,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890464002] [2019-11-06 18:42:45,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:42:45,423 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:45,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:42:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:45,442 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2019-11-06 18:42:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:45,601 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2019-11-06 18:42:45,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:42:45,603 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-06 18:42:45,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:45,614 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:42:45,615 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:42:45,620 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:42:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:42:45,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 18:42:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:42:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2019-11-06 18:42:45,675 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2019-11-06 18:42:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:45,676 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-06 18:42:45,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:42:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2019-11-06 18:42:45,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:42:45,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:45,680 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:45,681 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:45,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:45,682 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2019-11-06 18:42:45,682 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:45,683 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418824680] [2019-11-06 18:42:45,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:42:45,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418824680] [2019-11-06 18:42:45,785 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:42:45,785 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:42:45,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963381202] [2019-11-06 18:42:45,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:42:45,787 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:45,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:42:45,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:45,788 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2019-11-06 18:42:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:45,868 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:42:45,868 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:42:45,869 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-06 18:42:45,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:45,870 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:42:45,870 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:42:45,871 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:42:45,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:42:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2019-11-06 18:42:45,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:42:45,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-06 18:42:45,879 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2019-11-06 18:42:45,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:45,880 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-06 18:42:45,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:42:45,880 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-06 18:42:45,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-06 18:42:45,881 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:45,881 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:45,882 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:45,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2019-11-06 18:42:45,883 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:45,883 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005937884] [2019-11-06 18:42:45,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:42:45,984 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005937884] [2019-11-06 18:42:45,984 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503607409] [2019-11-06 18:42:45,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:46,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:42:46,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-06 18:42:46,101 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:46,101 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:42:46,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79456777] [2019-11-06 18:42:46,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:42:46,106 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:42:46,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:42:46,107 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2019-11-06 18:42:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:46,218 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2019-11-06 18:42:46,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:42:46,218 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2019-11-06 18:42:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:46,220 INFO L225 Difference]: With dead ends: 53 [2019-11-06 18:42:46,220 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:42:46,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:42:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:42:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-06 18:42:46,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:42:46,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2019-11-06 18:42:46,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2019-11-06 18:42:46,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:46,229 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2019-11-06 18:42:46,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:42:46,229 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2019-11-06 18:42:46,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:42:46,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:46,231 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:46,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:46,436 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2019-11-06 18:42:46,437 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:46,437 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297944037] [2019-11-06 18:42:46,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:42:46,514 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297944037] [2019-11-06 18:42:46,515 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924422493] [2019-11-06 18:42:46,515 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:46,589 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:42:46,590 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:46,591 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:42:46,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:42:46,610 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:46,610 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:42:46,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815249633] [2019-11-06 18:42:46,611 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:42:46,611 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:46,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:42:46,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:42:46,612 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 7 states. [2019-11-06 18:42:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:46,734 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2019-11-06 18:42:46,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:42:46,735 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-06 18:42:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:46,736 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:42:46,736 INFO L226 Difference]: Without dead ends: 39 [2019-11-06 18:42:46,737 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:42:46,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-06 18:42:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-11-06 18:42:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-06 18:42:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2019-11-06 18:42:46,749 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2019-11-06 18:42:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:46,750 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2019-11-06 18:42:46,750 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:42:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2019-11-06 18:42:46,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:42:46,753 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:46,754 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:46,961 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:46,961 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:46,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:46,962 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2019-11-06 18:42:46,962 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:46,962 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083994181] [2019-11-06 18:42:46,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:42:47,072 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083994181] [2019-11-06 18:42:47,072 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133552373] [2019-11-06 18:42:47,072 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:47,134 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:42:47,134 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:47,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:42:47,138 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-06 18:42:47,156 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:47,156 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:42:47,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287766741] [2019-11-06 18:42:47,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:42:47,160 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:42:47,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:47,160 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 8 states. [2019-11-06 18:42:47,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:47,297 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2019-11-06 18:42:47,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:42:47,297 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2019-11-06 18:42:47,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:47,298 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:42:47,299 INFO L226 Difference]: Without dead ends: 44 [2019-11-06 18:42:47,299 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:42:47,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-06 18:42:47,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2019-11-06 18:42:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:42:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-11-06 18:42:47,306 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2019-11-06 18:42:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:47,307 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-11-06 18:42:47,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:42:47,307 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-11-06 18:42:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:42:47,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:47,308 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:47,512 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:47,512 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:47,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2019-11-06 18:42:47,513 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:47,513 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235685426] [2019-11-06 18:42:47,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:47,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:47,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:47,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-06 18:42:47,625 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235685426] [2019-11-06 18:42:47,626 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319617956] [2019-11-06 18:42:47,626 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:47,676 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:47,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:47,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:42:47,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-06 18:42:47,697 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:47,698 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:42:47,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854394151] [2019-11-06 18:42:47,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:42:47,699 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:47,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:42:47,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:42:47,699 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 9 states. [2019-11-06 18:42:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:47,802 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:42:47,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:42:47,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2019-11-06 18:42:47,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:47,804 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:42:47,804 INFO L226 Difference]: Without dead ends: 49 [2019-11-06 18:42:47,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:42:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-06 18:42:47,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-11-06 18:42:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-06 18:42:47,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2019-11-06 18:42:47,812 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2019-11-06 18:42:47,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:47,812 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2019-11-06 18:42:47,812 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:42:47,813 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2019-11-06 18:42:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:42:47,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:47,814 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:48,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:48,015 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:48,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:48,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2019-11-06 18:42:48,016 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:48,016 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333857864] [2019-11-06 18:42:48,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:48,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-11-06 18:42:48,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333857864] [2019-11-06 18:42:48,146 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947144144] [2019-11-06 18:42:48,146 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:48,335 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:42:48,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:48,338 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:42:48,340 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:48,380 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-06 18:42:48,380 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:48,382 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:42:48,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510310454] [2019-11-06 18:42:48,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:42:48,383 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:48,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:42:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:42:48,385 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 10 states. [2019-11-06 18:42:48,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:48,529 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2019-11-06 18:42:48,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:42:48,529 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2019-11-06 18:42:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:48,530 INFO L225 Difference]: With dead ends: 89 [2019-11-06 18:42:48,530 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:42:48,532 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:42:48,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:42:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-11-06 18:42:48,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-06 18:42:48,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-11-06 18:42:48,545 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2019-11-06 18:42:48,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:48,545 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-11-06 18:42:48,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:42:48,545 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-11-06 18:42:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:42:48,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:48,547 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:48,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:48,752 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:48,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:48,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2019-11-06 18:42:48,752 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:48,753 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014243535] [2019-11-06 18:42:48,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-06 18:42:48,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014243535] [2019-11-06 18:42:48,868 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102646791] [2019-11-06 18:42:48,869 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:42:49,034 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:42:49,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:49,035 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:42:49,041 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-06 18:42:49,064 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:49,064 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:42:49,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318101400] [2019-11-06 18:42:49,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:42:49,067 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:49,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:42:49,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:42:49,070 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 11 states. [2019-11-06 18:42:49,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:49,219 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-11-06 18:42:49,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:42:49,219 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2019-11-06 18:42:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:49,220 INFO L225 Difference]: With dead ends: 98 [2019-11-06 18:42:49,221 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:42:49,221 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:42:49,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:42:49,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:42:49,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:42:49,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2019-11-06 18:42:49,228 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2019-11-06 18:42:49,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:49,228 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2019-11-06 18:42:49,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:42:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2019-11-06 18:42:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:42:49,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:49,230 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:49,434 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:49,434 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:49,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:49,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2019-11-06 18:42:49,435 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:49,436 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709220218] [2019-11-06 18:42:49,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 18:42:49,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709220218] [2019-11-06 18:42:49,567 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216231020] [2019-11-06 18:42:49,572 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-11-06 18:42:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:49,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:42:49,648 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-06 18:42:49,671 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:49,671 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:42:49,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116141807] [2019-11-06 18:42:49,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:42:49,675 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:49,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:42:49,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:42:49,676 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 12 states. [2019-11-06 18:42:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:49,826 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2019-11-06 18:42:49,826 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:42:49,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2019-11-06 18:42:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:49,827 INFO L225 Difference]: With dead ends: 107 [2019-11-06 18:42:49,828 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:42:49,828 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:42:49,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:42:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-11-06 18:42:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-06 18:42:49,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2019-11-06 18:42:49,835 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2019-11-06 18:42:49,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:49,835 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2019-11-06 18:42:49,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:42:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2019-11-06 18:42:49,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:42:49,837 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:49,837 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:50,047 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:50,048 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:50,049 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2019-11-06 18:42:50,049 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:50,049 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322674487] [2019-11-06 18:42:50,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:50,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:50,188 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:42:50,188 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322674487] [2019-11-06 18:42:50,189 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416742150] [2019-11-06 18:42:50,189 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 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 [2019-11-06 18:42:50,243 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:42:50,243 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:50,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:42:50,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-06 18:42:50,277 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:50,277 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:42:50,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748876469] [2019-11-06 18:42:50,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:42:50,279 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:42:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:42:50,279 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 13 states. [2019-11-06 18:42:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:50,400 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2019-11-06 18:42:50,401 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:42:50,401 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 57 [2019-11-06 18:42:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:50,402 INFO L225 Difference]: With dead ends: 116 [2019-11-06 18:42:50,402 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 18:42:50,403 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:42:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 18:42:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-11-06 18:42:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:42:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2019-11-06 18:42:50,410 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2019-11-06 18:42:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:50,410 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2019-11-06 18:42:50,410 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:42:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2019-11-06 18:42:50,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 18:42:50,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:50,412 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:50,615 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:50,616 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:50,617 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2019-11-06 18:42:50,617 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:50,617 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250746783] [2019-11-06 18:42:50,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 18:42:50,773 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250746783] [2019-11-06 18:42:50,773 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433482903] [2019-11-06 18:42:50,773 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:42:50,975 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:42:50,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:50,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:42:50,980 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-11-06 18:42:51,004 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:51,005 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:42:51,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670211051] [2019-11-06 18:42:51,006 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:42:51,006 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:51,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:42:51,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:42:51,007 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 14 states. [2019-11-06 18:42:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:51,209 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2019-11-06 18:42:51,209 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:42:51,210 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2019-11-06 18:42:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:51,210 INFO L225 Difference]: With dead ends: 125 [2019-11-06 18:42:51,210 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:42:51,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:42:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:42:51,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2019-11-06 18:42:51,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:42:51,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-11-06 18:42:51,218 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2019-11-06 18:42:51,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:51,218 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-11-06 18:42:51,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:42:51,218 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-11-06 18:42:51,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:42:51,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:51,220 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:51,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:51,424 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:51,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2019-11-06 18:42:51,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:51,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86552437] [2019-11-06 18:42:51,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-06 18:42:51,586 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86552437] [2019-11-06 18:42:51,587 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302806589] [2019-11-06 18:42:51,587 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:42:51,655 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:42:51,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:42:51,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:42:51,659 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:42:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-06 18:42:51,680 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:42:51,680 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:42:51,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147734480] [2019-11-06 18:42:51,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:42:51,681 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:42:51,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:42:51,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:42:51,681 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 15 states. [2019-11-06 18:42:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:42:51,840 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:42:51,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:42:51,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2019-11-06 18:42:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:42:51,842 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:42:51,842 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:42:51,843 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:42:51,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:42:51,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:42:51,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:42:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2019-11-06 18:42:51,850 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2019-11-06 18:42:51,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:42:51,850 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2019-11-06 18:42:51,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:42:51,850 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2019-11-06 18:42:51,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-06 18:42:51,852 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:42:51,852 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:42:52,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:42:52,068 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:42:52,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:42:52,068 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2019-11-06 18:42:52,069 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:42:52,069 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052012454] [2019-11-06 18:42:52,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:42:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:42:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-11-06 18:42:52,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052012454] [2019-11-06 18:42:52,221 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026899414] [2019-11-06 18:42:52,221 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:11,461 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:43:11,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:11,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:43:11,482 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:43:11,504 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:11,504 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:43:11,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524723069] [2019-11-06 18:43:11,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:43:11,505 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:11,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:43:11,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:11,506 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 16 states. [2019-11-06 18:43:11,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:11,717 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2019-11-06 18:43:11,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:43:11,718 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2019-11-06 18:43:11,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:11,719 INFO L225 Difference]: With dead ends: 143 [2019-11-06 18:43:11,719 INFO L226 Difference]: Without dead ends: 84 [2019-11-06 18:43:11,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:43:11,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-11-06 18:43:11,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2019-11-06 18:43:11,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-06 18:43:11,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2019-11-06 18:43:11,737 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2019-11-06 18:43:11,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:11,738 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2019-11-06 18:43:11,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:43:11,738 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2019-11-06 18:43:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 18:43:11,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:11,739 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:11,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:11,950 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:11,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:11,950 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2019-11-06 18:43:11,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:11,951 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961927273] [2019-11-06 18:43:11,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-11-06 18:43:12,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961927273] [2019-11-06 18:43:12,137 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75351991] [2019-11-06 18:43:12,137 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:25,251 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:43:25,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:25,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:43:25,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-06 18:43:25,284 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:25,285 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-11-06 18:43:25,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158631382] [2019-11-06 18:43:25,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:43:25,286 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:25,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:43:25,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:43:25,286 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 17 states. [2019-11-06 18:43:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:25,436 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2019-11-06 18:43:25,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:43:25,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2019-11-06 18:43:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:25,438 INFO L225 Difference]: With dead ends: 152 [2019-11-06 18:43:25,438 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:43:25,439 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:43:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:43:25,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:43:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:43:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2019-11-06 18:43:25,453 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 77 [2019-11-06 18:43:25,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:25,453 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2019-11-06 18:43:25,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:43:25,453 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2019-11-06 18:43:25,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:43:25,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:25,454 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:25,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:25,665 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:25,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:25,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1239413930, now seen corresponding path program 13 times [2019-11-06 18:43:25,666 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:25,666 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178714707] [2019-11-06 18:43:25,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:25,843 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-06 18:43:25,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178714707] [2019-11-06 18:43:25,844 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133382725] [2019-11-06 18:43:25,844 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:25,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:43:25,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-11-06 18:43:25,925 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:25,926 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:43:25,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000455401] [2019-11-06 18:43:25,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:43:25,926 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:25,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:43:25,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:43:25,927 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 18 states. [2019-11-06 18:43:26,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:26,132 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2019-11-06 18:43:26,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:43:26,132 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2019-11-06 18:43:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:26,133 INFO L225 Difference]: With dead ends: 161 [2019-11-06 18:43:26,134 INFO L226 Difference]: Without dead ends: 94 [2019-11-06 18:43:26,135 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:43:26,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-11-06 18:43:26,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-06 18:43:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-06 18:43:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2019-11-06 18:43:26,141 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 82 [2019-11-06 18:43:26,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:26,141 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2019-11-06 18:43:26,142 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:43:26,142 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2019-11-06 18:43:26,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 18:43:26,143 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:26,143 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:26,351 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:26,351 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:26,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:26,352 INFO L82 PathProgramCache]: Analyzing trace with hash -535424030, now seen corresponding path program 14 times [2019-11-06 18:43:26,352 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:26,353 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426008740] [2019-11-06 18:43:26,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-06 18:43:26,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426008740] [2019-11-06 18:43:26,540 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131013346] [2019-11-06 18:43:26,540 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:26,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:43:26,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:26,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:43:26,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-06 18:43:26,624 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:26,625 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:43:26,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169956630] [2019-11-06 18:43:26,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:43:26,625 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:43:26,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:43:26,626 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 19 states. [2019-11-06 18:43:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:26,867 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2019-11-06 18:43:26,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:43:26,867 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2019-11-06 18:43:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:26,868 INFO L225 Difference]: With dead ends: 170 [2019-11-06 18:43:26,868 INFO L226 Difference]: Without dead ends: 99 [2019-11-06 18:43:26,868 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:43:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-11-06 18:43:26,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-11-06 18:43:26,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:43:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2019-11-06 18:43:26,874 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2019-11-06 18:43:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:26,874 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2019-11-06 18:43:26,875 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:43:26,875 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2019-11-06 18:43:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-11-06 18:43:26,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:26,876 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:27,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:27,079 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:27,079 INFO L82 PathProgramCache]: Analyzing trace with hash -422313566, now seen corresponding path program 15 times [2019-11-06 18:43:27,079 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:27,079 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486421366] [2019-11-06 18:43:27,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-06 18:43:27,328 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486421366] [2019-11-06 18:43:27,328 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536434639] [2019-11-06 18:43:27,328 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:29,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:43:29,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:29,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 18:43:29,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2019-11-06 18:43:29,891 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:29,891 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-06 18:43:29,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399114983] [2019-11-06 18:43:29,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:43:29,891 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:29,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:43:29,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:43:29,894 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 20 states. [2019-11-06 18:43:30,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:30,063 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2019-11-06 18:43:30,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:43:30,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2019-11-06 18:43:30,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:30,065 INFO L225 Difference]: With dead ends: 179 [2019-11-06 18:43:30,065 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 18:43:30,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:43:30,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 18:43:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-11-06 18:43:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 18:43:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2019-11-06 18:43:30,070 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 92 [2019-11-06 18:43:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:30,070 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2019-11-06 18:43:30,071 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:43:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2019-11-06 18:43:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 18:43:30,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:30,072 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:30,278 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:30,279 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:30,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:30,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1861215782, now seen corresponding path program 16 times [2019-11-06 18:43:30,280 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:30,280 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553906044] [2019-11-06 18:43:30,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:30,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-11-06 18:43:30,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553906044] [2019-11-06 18:43:30,588 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15218477] [2019-11-06 18:43:30,588 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:30,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:43:30,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:43:30,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:43:30,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:43:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-06 18:43:30,723 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:43:30,723 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:43:30,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569090557] [2019-11-06 18:43:30,724 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:43:30,724 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:43:30,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:43:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:43:30,724 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 21 states. [2019-11-06 18:43:30,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:43:30,902 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2019-11-06 18:43:30,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:43:30,903 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2019-11-06 18:43:30,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:43:30,904 INFO L225 Difference]: With dead ends: 188 [2019-11-06 18:43:30,905 INFO L226 Difference]: Without dead ends: 109 [2019-11-06 18:43:30,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:43:30,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-06 18:43:30,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2019-11-06 18:43:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:43:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2019-11-06 18:43:30,910 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 97 [2019-11-06 18:43:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:43:30,911 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2019-11-06 18:43:30,911 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:43:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2019-11-06 18:43:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:43:30,912 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:43:30,912 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:43:31,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:43:31,121 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:43:31,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:43:31,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1207301786, now seen corresponding path program 17 times [2019-11-06 18:43:31,122 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:43:31,122 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180727697] [2019-11-06 18:43:31,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:43:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:43:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-11-06 18:43:31,360 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180727697] [2019-11-06 18:43:31,360 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187320203] [2019-11-06 18:43:31,360 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true