/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_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:44:56,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:44:56,375 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:44:56,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:44:56,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:44:56,389 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:44:56,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:44:56,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:44:56,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:44:56,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:44:56,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:44:56,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:44:56,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:44:56,399 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:44:56,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:44:56,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:44:56,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:44:56,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:44:56,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:44:56,406 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:44:56,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:44:56,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:44:56,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:44:56,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:44:56,416 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:44:56,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:44:56,420 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:44:56,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:44:56,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:44:56,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:44:56,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:44:56,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:44:56,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:44:56,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:44:56,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:44:56,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:44:56,426 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 18:44:56,439 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:44:56,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:44:56,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:44:56,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:44:56,442 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:44:56,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:44:56,442 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:44:56,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:44:56,442 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:44:56,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:44:56,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:44:56,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:44:56,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:44:56,443 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:44:56,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:44:56,444 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:44:56,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:44:56,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:44:56,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:44:56,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:44:56,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:44:56,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:44:56,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:44:56,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:44:56,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:44:56,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:44:56,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:44:56,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:44:56,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:44:56,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:44:56,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:44:56,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:44:56,735 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:44:56,735 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:44:56,736 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2019-11-06 18:44:56,798 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84b4c86f0/c6b73ff13b2144bcbcfe7906160eae3b/FLAG75bb74e8e [2019-11-06 18:44:57,256 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:44:57,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2019-11-06 18:44:57,264 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84b4c86f0/c6b73ff13b2144bcbcfe7906160eae3b/FLAG75bb74e8e [2019-11-06 18:44:57,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84b4c86f0/c6b73ff13b2144bcbcfe7906160eae3b [2019-11-06 18:44:57,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:44:57,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:44:57,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:44:57,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:44:57,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:44:57,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:44:57" (1/1) ... [2019-11-06 18:44:57,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4251b8eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:57, skipping insertion in model container [2019-11-06 18:44:57,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:44:57" (1/1) ... [2019-11-06 18:44:57,688 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:44:57,711 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:44:57,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:44:57,927 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:44:57,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:44:58,049 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:44:58,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58 WrapperNode [2019-11-06 18:44:58,049 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:44:58,050 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:44:58,050 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:44:58,050 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:44:58,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (1/1) ... [2019-11-06 18:44:58,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (1/1) ... [2019-11-06 18:44:58,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (1/1) ... [2019-11-06 18:44:58,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (1/1) ... [2019-11-06 18:44:58,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (1/1) ... [2019-11-06 18:44:58,085 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (1/1) ... [2019-11-06 18:44:58,086 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (1/1) ... [2019-11-06 18:44:58,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:44:58,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:44:58,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:44:58,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:44:58,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (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 18:44:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:44:58,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:44:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:44:58,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:44:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:44:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:44:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:44:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:44:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:44:58,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:44:58,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:44:58,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:44:58,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:44:58,449 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:44:58,449 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-06 18:44:58,451 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:44:58 BoogieIcfgContainer [2019-11-06 18:44:58,451 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:44:58,459 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:44:58,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:44:58,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:44:58,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:44:57" (1/3) ... [2019-11-06 18:44:58,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23246391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:44:58, skipping insertion in model container [2019-11-06 18:44:58,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:44:58" (2/3) ... [2019-11-06 18:44:58,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23246391 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:44:58, skipping insertion in model container [2019-11-06 18:44:58,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:44:58" (3/3) ... [2019-11-06 18:44:58,474 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2019-11-06 18:44:58,484 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:44:58,506 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:44:58,515 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:44:58,541 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:44:58,542 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:44:58,542 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:44:58,542 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:44:58,542 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:44:58,542 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:44:58,542 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:44:58,543 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:44:58,560 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2019-11-06 18:44:58,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:44:58,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:58,567 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:58,569 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:58,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1916738342, now seen corresponding path program 1 times [2019-11-06 18:44:58,580 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:58,580 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821022185] [2019-11-06 18:44:58,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:58,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:58,759 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 18:44:58,759 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821022185] [2019-11-06 18:44:58,763 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:44:58,764 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:44:58,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416274982] [2019-11-06 18:44:58,772 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:44:58,772 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:58,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:44:58,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:44:58,790 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2019-11-06 18:44:58,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:58,921 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2019-11-06 18:44:58,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:44:58,923 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-11-06 18:44:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:58,933 INFO L225 Difference]: With dead ends: 67 [2019-11-06 18:44:58,933 INFO L226 Difference]: Without dead ends: 32 [2019-11-06 18:44:58,937 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 18:44:58,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-06 18:44:58,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-06 18:44:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:44:58,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2019-11-06 18:44:58,996 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 27 [2019-11-06 18:44:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:58,997 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2019-11-06 18:44:58,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:44:58,998 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2019-11-06 18:44:59,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:44:59,000 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:59,001 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:59,003 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash -330794466, now seen corresponding path program 1 times [2019-11-06 18:44:59,004 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:59,005 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895594464] [2019-11-06 18:44:59,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:59,119 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 18:44:59,120 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895594464] [2019-11-06 18:44:59,121 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:44:59,121 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:44:59,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093875338] [2019-11-06 18:44:59,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:44:59,127 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:59,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:44:59,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:44:59,131 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2019-11-06 18:44:59,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:59,300 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2019-11-06 18:44:59,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:44:59,301 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-11-06 18:44:59,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:59,302 INFO L225 Difference]: With dead ends: 65 [2019-11-06 18:44:59,302 INFO L226 Difference]: Without dead ends: 40 [2019-11-06 18:44:59,303 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 18:44:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-06 18:44:59,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-11-06 18:44:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-06 18:44:59,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2019-11-06 18:44:59,313 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2019-11-06 18:44:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:59,314 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2019-11-06 18:44:59,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:44:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2019-11-06 18:44:59,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:44:59,315 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:59,315 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:59,316 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:59,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1167956326, now seen corresponding path program 1 times [2019-11-06 18:44:59,317 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:59,317 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946937393] [2019-11-06 18:44:59,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:44:59,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:44:59,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946937393] [2019-11-06 18:44:59,431 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641940278] [2019-11-06 18:44:59,432 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 18:44:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:44:59,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:44:59,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:44:59,553 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:44:59,554 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:44:59,554 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:44:59,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673382796] [2019-11-06 18:44:59,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:44:59,556 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:44:59,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:44:59,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:44:59,557 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 6 states. [2019-11-06 18:44:59,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:44:59,747 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2019-11-06 18:44:59,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:44:59,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2019-11-06 18:44:59,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:44:59,748 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:44:59,749 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:44:59,749 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 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 18:44:59,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:44:59,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-06 18:44:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-06 18:44:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-11-06 18:44:59,758 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2019-11-06 18:44:59,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:44:59,759 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-11-06 18:44:59,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:44:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-11-06 18:44:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:44:59,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:44:59,760 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:44:59,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:44:59,964 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:44:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:44:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1255820446, now seen corresponding path program 2 times [2019-11-06 18:44:59,966 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:44:59,966 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274016362] [2019-11-06 18:44:59,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:45:00,087 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274016362] [2019-11-06 18:45:00,088 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433977207] [2019-11-06 18:45:00,088 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 18:45:00,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:45:00,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:00,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:45:00,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:00,156 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:45:00,156 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:00,156 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:45:00,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796283450] [2019-11-06 18:45:00,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:45:00,158 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:45:00,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:45:00,158 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 7 states. [2019-11-06 18:45:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:00,337 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2019-11-06 18:45:00,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:45:00,337 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-11-06 18:45:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:00,339 INFO L225 Difference]: With dead ends: 95 [2019-11-06 18:45:00,339 INFO L226 Difference]: Without dead ends: 56 [2019-11-06 18:45:00,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 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 18:45:00,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-06 18:45:00,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-06 18:45:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:45:00,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2019-11-06 18:45:00,348 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2019-11-06 18:45:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:00,349 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2019-11-06 18:45:00,349 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:45:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2019-11-06 18:45:00,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:45:00,351 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:00,351 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:00,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:00,556 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2017193242, now seen corresponding path program 3 times [2019-11-06 18:45:00,557 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:00,557 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985279270] [2019-11-06 18:45:00,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 18:45:00,721 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985279270] [2019-11-06 18:45:00,721 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271126325] [2019-11-06 18:45:00,722 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 18:45:00,838 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:45:00,838 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:00,839 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:45:00,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-06 18:45:00,866 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:00,866 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:45:00,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031058049] [2019-11-06 18:45:00,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:45:00,868 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:00,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:45:00,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:45:00,868 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 8 states. [2019-11-06 18:45:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:01,062 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2019-11-06 18:45:01,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:45:01,062 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-06 18:45:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:01,063 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:45:01,064 INFO L226 Difference]: Without dead ends: 64 [2019-11-06 18:45:01,065 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 52 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 18:45:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-06 18:45:01,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2019-11-06 18:45:01,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-06 18:45:01,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2019-11-06 18:45:01,074 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2019-11-06 18:45:01,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:01,075 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2019-11-06 18:45:01,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:45:01,075 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2019-11-06 18:45:01,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 18:45:01,077 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:01,077 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:01,281 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:01,282 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:01,283 INFO L82 PathProgramCache]: Analyzing trace with hash 544374558, now seen corresponding path program 4 times [2019-11-06 18:45:01,284 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:01,284 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950004264] [2019-11-06 18:45:01,285 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 18:45:01,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950004264] [2019-11-06 18:45:01,407 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611856409] [2019-11-06 18:45:01,407 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 18:45:01,481 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:45:01,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:01,483 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:45:01,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:01,508 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 18:45:01,509 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:01,516 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:45:01,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029438731] [2019-11-06 18:45:01,518 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:45:01,518 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:45:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:45:01,519 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 9 states. [2019-11-06 18:45:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:01,736 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2019-11-06 18:45:01,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:45:01,736 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2019-11-06 18:45:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:01,737 INFO L225 Difference]: With dead ends: 125 [2019-11-06 18:45:01,738 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:45:01,738 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 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 18:45:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:45:01,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-11-06 18:45:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-06 18:45:01,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2019-11-06 18:45:01,755 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 59 [2019-11-06 18:45:01,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:01,755 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2019-11-06 18:45:01,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:45:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2019-11-06 18:45:01,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:45:01,756 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:01,756 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:01,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:01,958 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:01,958 INFO L82 PathProgramCache]: Analyzing trace with hash 325227418, now seen corresponding path program 5 times [2019-11-06 18:45:01,959 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:01,959 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652011654] [2019-11-06 18:45:01,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-06 18:45:02,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652011654] [2019-11-06 18:45:02,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870838660] [2019-11-06 18:45:02,102 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 18:45:11,831 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-06 18:45:11,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:11,842 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:45:11,845 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-06 18:45:11,873 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:11,874 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:45:11,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16605430] [2019-11-06 18:45:11,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:45:11,875 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:11,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:45:11,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:45:11,876 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 10 states. [2019-11-06 18:45:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:12,059 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2019-11-06 18:45:12,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:45:12,060 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2019-11-06 18:45:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:12,061 INFO L225 Difference]: With dead ends: 140 [2019-11-06 18:45:12,061 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:45:12,064 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 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 18:45:12,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:45:12,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2019-11-06 18:45:12,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-06 18:45:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2019-11-06 18:45:12,077 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 67 [2019-11-06 18:45:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:12,078 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2019-11-06 18:45:12,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:45:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2019-11-06 18:45:12,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-06 18:45:12,084 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:12,085 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:12,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:12,297 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:12,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:12,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1206981022, now seen corresponding path program 6 times [2019-11-06 18:45:12,298 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:12,298 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567013053] [2019-11-06 18:45:12,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:12,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:12,480 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-06 18:45:12,480 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567013053] [2019-11-06 18:45:12,481 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261233832] [2019-11-06 18:45:12,481 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 18:45:14,526 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-06 18:45:14,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:14,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:45:14,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-06 18:45:14,561 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:14,563 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:45:14,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712816878] [2019-11-06 18:45:14,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:45:14,564 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:45:14,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:45:14,565 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 11 states. [2019-11-06 18:45:14,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:14,801 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2019-11-06 18:45:14,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:45:14,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2019-11-06 18:45:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:14,804 INFO L225 Difference]: With dead ends: 155 [2019-11-06 18:45:14,804 INFO L226 Difference]: Without dead ends: 88 [2019-11-06 18:45:14,806 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:45:14,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-06 18:45:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-06 18:45:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-06 18:45:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2019-11-06 18:45:14,815 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 75 [2019-11-06 18:45:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:14,815 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2019-11-06 18:45:14,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:45:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2019-11-06 18:45:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-06 18:45:14,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:14,817 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:15,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:15,032 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:15,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:15,032 INFO L82 PathProgramCache]: Analyzing trace with hash 192305690, now seen corresponding path program 7 times [2019-11-06 18:45:15,032 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:15,032 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072997422] [2019-11-06 18:45:15,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:15,224 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-06 18:45:15,225 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072997422] [2019-11-06 18:45:15,226 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660943838] [2019-11-06 18:45:15,226 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 18:45:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:15,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:45:15,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-11-06 18:45:15,334 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:15,334 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:45:15,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3649589] [2019-11-06 18:45:15,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:45:15,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:15,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:45:15,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:45:15,335 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 12 states. [2019-11-06 18:45:15,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:15,591 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2019-11-06 18:45:15,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:45:15,592 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2019-11-06 18:45:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:15,593 INFO L225 Difference]: With dead ends: 170 [2019-11-06 18:45:15,593 INFO L226 Difference]: Without dead ends: 96 [2019-11-06 18:45:15,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 84 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 18:45:15,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-06 18:45:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2019-11-06 18:45:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-11-06 18:45:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2019-11-06 18:45:15,603 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 83 [2019-11-06 18:45:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:15,603 INFO L462 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2019-11-06 18:45:15,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:45:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2019-11-06 18:45:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-11-06 18:45:15,604 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:15,605 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:15,808 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:15,809 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:15,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:15,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1640627170, now seen corresponding path program 8 times [2019-11-06 18:45:15,810 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:15,810 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661286761] [2019-11-06 18:45:15,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-11-06 18:45:16,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661286761] [2019-11-06 18:45:16,000 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778690144] [2019-11-06 18:45:16,000 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 18:45:16,073 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:45:16,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:45:16,074 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:45:16,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:45:16,110 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2019-11-06 18:45:16,111 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:45:16,111 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:45:16,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146947722] [2019-11-06 18:45:16,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:45:16,112 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:45:16,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:45:16,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:45:16,112 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 13 states. [2019-11-06 18:45:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:45:16,311 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2019-11-06 18:45:16,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:45:16,312 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2019-11-06 18:45:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:45:16,313 INFO L225 Difference]: With dead ends: 185 [2019-11-06 18:45:16,313 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 18:45:16,314 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 92 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 18:45:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 18:45:16,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2019-11-06 18:45:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-06 18:45:16,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2019-11-06 18:45:16,324 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 91 [2019-11-06 18:45:16,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:45:16,325 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2019-11-06 18:45:16,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:45:16,325 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2019-11-06 18:45:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 18:45:16,326 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:45:16,326 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:45:16,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:45:16,530 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:45:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:45:16,531 INFO L82 PathProgramCache]: Analyzing trace with hash -32030566, now seen corresponding path program 9 times [2019-11-06 18:45:16,531 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:45:16,532 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730039836] [2019-11-06 18:45:16,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:45:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:45:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-11-06 18:45:16,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730039836] [2019-11-06 18:45:16,719 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697129677] [2019-11-06 18:45:16,719 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