/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/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 21:24:22,399 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 21:24:22,402 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 21:24:22,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 21:24:22,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 21:24:22,417 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 21:24:22,418 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 21:24:22,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 21:24:22,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 21:24:22,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 21:24:22,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 21:24:22,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 21:24:22,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 21:24:22,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 21:24:22,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 21:24:22,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 21:24:22,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 21:24:22,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 21:24:22,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 21:24:22,433 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 21:24:22,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 21:24:22,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 21:24:22,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 21:24:22,437 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 21:24:22,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 21:24:22,443 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 21:24:22,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 21:24:22,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 21:24:22,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 21:24:22,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 21:24:22,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 21:24:22,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 21:24:22,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 21:24:22,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 21:24:22,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 21:24:22,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 21:24:22,450 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 21:24:22,467 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 21:24:22,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 21:24:22,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 21:24:22,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 21:24:22,469 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 21:24:22,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 21:24:22,469 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 21:24:22,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 21:24:22,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 21:24:22,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 21:24:22,471 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 21:24:22,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 21:24:22,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 21:24:22,471 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 21:24:22,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 21:24:22,472 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 21:24:22,472 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 21:24:22,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 21:24:22,474 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 21:24:22,474 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 21:24:22,474 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 21:24:22,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 21:24:22,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 21:24:22,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 21:24:22,475 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 21:24:22,475 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 21:24:22,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 21:24:22,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 21:24:22,476 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 21:24:22,746 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 21:24:22,759 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 21:24:22,763 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 21:24:22,764 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 21:24:22,765 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 21:24:22,766 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-11-06 21:24:22,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be70c0c38/948c02f180014b0199e3a87036b367ab/FLAG0185aa188 [2019-11-06 21:24:23,265 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 21:24:23,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-11-06 21:24:23,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be70c0c38/948c02f180014b0199e3a87036b367ab/FLAG0185aa188 [2019-11-06 21:24:23,676 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be70c0c38/948c02f180014b0199e3a87036b367ab [2019-11-06 21:24:23,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 21:24:23,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 21:24:23,689 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 21:24:23,689 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 21:24:23,693 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 21:24:23,694 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:23,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@106f54c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23, skipping insertion in model container [2019-11-06 21:24:23,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:23,706 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 21:24:23,730 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 21:24:23,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:24:23,963 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 21:24:23,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 21:24:23,996 INFO L192 MainTranslator]: Completed translation [2019-11-06 21:24:23,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23 WrapperNode [2019-11-06 21:24:23,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 21:24:23,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 21:24:23,998 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 21:24:23,998 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 21:24:24,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:24,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:24,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:24,102 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:24,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:24,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:24,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (1/1) ... [2019-11-06 21:24:24,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 21:24:24,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 21:24:24,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 21:24:24,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 21:24:24,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (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 21:24:24,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 21:24:24,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 21:24:24,187 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 21:24:24,187 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2019-11-06 21:24:24,188 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 21:24:24,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 21:24:24,188 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-06 21:24:24,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 21:24:24,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-11-06 21:24:24,188 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2019-11-06 21:24:24,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 21:24:24,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 21:24:24,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-06 21:24:24,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 21:24:24,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 21:24:24,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 21:24:24,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 21:24:24,461 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 21:24:24,462 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 21:24:24,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:24:24 BoogieIcfgContainer [2019-11-06 21:24:24,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 21:24:24,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 21:24:24,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 21:24:24,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 21:24:24,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:24:23" (1/3) ... [2019-11-06 21:24:24,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e765f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:24:24, skipping insertion in model container [2019-11-06 21:24:24,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:24:23" (2/3) ... [2019-11-06 21:24:24,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e765f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:24:24, skipping insertion in model container [2019-11-06 21:24:24,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:24:24" (3/3) ... [2019-11-06 21:24:24,482 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-11-06 21:24:24,505 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 21:24:24,519 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 21:24:24,531 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 21:24:24,557 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 21:24:24,557 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 21:24:24,557 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 21:24:24,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 21:24:24,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 21:24:24,558 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 21:24:24,558 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 21:24:24,558 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 21:24:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-06 21:24:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-06 21:24:24,583 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:24,584 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:24,586 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1860043698, now seen corresponding path program 1 times [2019-11-06 21:24:24,599 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:24,600 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439772285] [2019-11-06 21:24:24,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:24,866 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 21:24:24,867 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439772285] [2019-11-06 21:24:24,868 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:24:24,868 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 21:24:24,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544628680] [2019-11-06 21:24:24,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 21:24:24,874 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:24,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 21:24:24,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 21:24:24,896 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-11-06 21:24:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:25,000 INFO L93 Difference]: Finished difference Result 44 states and 51 transitions. [2019-11-06 21:24:25,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 21:24:25,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-11-06 21:24:25,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:25,010 INFO L225 Difference]: With dead ends: 44 [2019-11-06 21:24:25,011 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 21:24:25,016 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 21:24:25,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 21:24:25,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-06 21:24:25,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 21:24:25,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-06 21:24:25,058 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-11-06 21:24:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:25,059 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-06 21:24:25,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 21:24:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-06 21:24:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:24:25,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:25,061 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] [2019-11-06 21:24:25,061 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:25,062 INFO L82 PathProgramCache]: Analyzing trace with hash 916881159, now seen corresponding path program 1 times [2019-11-06 21:24:25,062 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:25,062 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427767266] [2019-11-06 21:24:25,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:25,283 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 21:24:25,283 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427767266] [2019-11-06 21:24:25,283 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:24:25,284 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:24:25,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865974405] [2019-11-06 21:24:25,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:24:25,287 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:24:25,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:24:25,288 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-06 21:24:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:25,489 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2019-11-06 21:24:25,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 21:24:25,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-06 21:24:25,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:25,491 INFO L225 Difference]: With dead ends: 29 [2019-11-06 21:24:25,491 INFO L226 Difference]: Without dead ends: 21 [2019-11-06 21:24:25,493 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:24:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-06 21:24:25,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-06 21:24:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 21:24:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-06 21:24:25,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 20 [2019-11-06 21:24:25,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:25,500 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-06 21:24:25,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:24:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2019-11-06 21:24:25,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 21:24:25,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:25,502 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] [2019-11-06 21:24:25,502 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:25,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:25,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1635275802, now seen corresponding path program 1 times [2019-11-06 21:24:25,503 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:25,503 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571619859] [2019-11-06 21:24:25,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:25,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:25,742 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 21:24:25,742 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571619859] [2019-11-06 21:24:25,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 21:24:25,743 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 21:24:25,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80031027] [2019-11-06 21:24:25,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 21:24:25,744 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 21:24:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-06 21:24:25,745 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2019-11-06 21:24:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:25,908 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2019-11-06 21:24:25,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 21:24:25,909 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2019-11-06 21:24:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:25,910 INFO L225 Difference]: With dead ends: 33 [2019-11-06 21:24:25,910 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 21:24:25,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 21:24:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 21:24:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-11-06 21:24:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 21:24:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 21:24:25,917 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2019-11-06 21:24:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:25,918 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 21:24:25,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 21:24:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 21:24:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 21:24:25,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:25,919 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:25,919 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:25,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:25,920 INFO L82 PathProgramCache]: Analyzing trace with hash 636491705, now seen corresponding path program 1 times [2019-11-06 21:24:25,920 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:25,920 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864343518] [2019-11-06 21:24:25,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:26,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:26,208 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864343518] [2019-11-06 21:24:26,209 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927208936] [2019-11-06 21:24:26,209 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 21:24:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:26,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 21:24:26,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:26,358 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:24:26,359 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2019-11-06 21:24:26,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920833501] [2019-11-06 21:24:26,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 21:24:26,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 21:24:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-11-06 21:24:26,361 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 12 states. [2019-11-06 21:24:26,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:26,589 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2019-11-06 21:24:26,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:24:26,590 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-06 21:24:26,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:26,591 INFO L225 Difference]: With dead ends: 36 [2019-11-06 21:24:26,591 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 21:24:26,593 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:24:26,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 21:24:26,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-06 21:24:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 21:24:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-06 21:24:26,605 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2019-11-06 21:24:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:26,606 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-06 21:24:26,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 21:24:26,607 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-06 21:24:26,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:24:26,608 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:26,610 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:26,814 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:26,814 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:26,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:26,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1232357626, now seen corresponding path program 2 times [2019-11-06 21:24:26,816 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:26,817 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783442445] [2019-11-06 21:24:26,817 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 21:24:27,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783442445] [2019-11-06 21:24:27,128 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499498236] [2019-11-06 21:24:27,128 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 21:24:27,179 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-06 21:24:27,179 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 21:24:27,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 21:24:27,182 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 21:24:27,277 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:24:27,277 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2019-11-06 21:24:27,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705269257] [2019-11-06 21:24:27,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 21:24:27,279 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:27,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 21:24:27,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2019-11-06 21:24:27,279 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 11 states. [2019-11-06 21:24:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 21:24:27,594 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2019-11-06 21:24:27,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 21:24:27,595 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-11-06 21:24:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 21:24:27,597 INFO L225 Difference]: With dead ends: 39 [2019-11-06 21:24:27,599 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 21:24:27,599 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2019-11-06 21:24:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 21:24:27,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2019-11-06 21:24:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 21:24:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2019-11-06 21:24:27,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 26 [2019-11-06 21:24:27,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 21:24:27,610 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2019-11-06 21:24:27,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 21:24:27,611 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2019-11-06 21:24:27,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-06 21:24:27,612 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 21:24:27,612 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 21:24:27,815 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:27,816 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 21:24:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 21:24:27,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1625384636, now seen corresponding path program 1 times [2019-11-06 21:24:27,816 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 21:24:27,816 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226605102] [2019-11-06 21:24:27,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 21:24:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:30,143 WARN L191 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 163 DAG size of output: 31 [2019-11-06 21:24:30,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:30,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226605102] [2019-11-06 21:24:30,858 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504647396] [2019-11-06 21:24:30,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 21:24:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 21:24:30,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-06 21:24:30,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 21:24:30,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:39,057 WARN L191 SmtUtils]: Spent 2.02 s on a formula simplification. DAG size of input: 30 DAG size of output: 13 [2019-11-06 21:24:39,122 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 55 [2019-11-06 21:24:39,123 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-06 21:24:39,141 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-06 21:24:39,142 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 1 [2019-11-06 21:24:39,142 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-06 21:24:39,218 INFO L567 ElimStorePlain]: treesize reduction 280, result has 11.1 percent of original size [2019-11-06 21:24:39,218 INFO L464 ElimStorePlain]: Eliminatee |v_#memory_int_6| vanished before elimination [2019-11-06 21:24:39,218 INFO L464 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2019-11-06 21:24:39,218 INFO L464 ElimStorePlain]: Eliminatee v_prenex_4 vanished before elimination [2019-11-06 21:24:39,219 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-06 21:24:39,220 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:377, output treesize:35 [2019-11-06 21:24:41,320 WARN L191 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 28 [2019-11-06 21:24:43,914 WARN L191 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 46 [2019-11-06 21:24:45,156 WARN L191 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2019-11-06 21:24:46,883 WARN L191 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2019-11-06 21:24:46,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:46,887 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:46,890 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:46,891 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:46,894 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:50,758 WARN L191 SmtUtils]: Spent 3.75 s on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-11-06 21:24:50,942 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-11-06 21:24:50,944 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 21:24:53,769 WARN L191 SmtUtils]: Spent 2.67 s on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2019-11-06 21:24:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 21:24:53,884 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 21:24:53,884 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2019-11-06 21:24:53,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025962869] [2019-11-06 21:24:53,885 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 21:24:53,885 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 21:24:53,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 21:24:53,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=563, Unknown=1, NotChecked=0, Total=650 [2019-11-06 21:24:53,886 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 26 states. [2019-11-06 21:24:54,573 WARN L191 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2019-11-06 21:24:56,985 WARN L191 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 95 DAG size of output: 71 [2019-11-06 21:25:01,418 WARN L191 SmtUtils]: Spent 4.35 s on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2019-11-06 21:25:04,492 WARN L191 SmtUtils]: Spent 2.96 s on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2019-11-06 21:25:05,484 WARN L191 SmtUtils]: Spent 909.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-11-06 21:25:08,853 WARN L191 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 105 DAG size of output: 73 [2019-11-06 21:25:09,888 WARN L191 SmtUtils]: Spent 971.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2019-11-06 21:25:12,237 WARN L191 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 99 DAG size of output: 83