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_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:45:15,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:45:15,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:45:15,323 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:45:15,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:45:15,325 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:45:15,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:45:15,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:45:15,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:45:15,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:45:15,344 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:45:15,345 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:45:15,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:45:15,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:45:15,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:45:15,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:45:15,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:45:15,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:45:15,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:45:15,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:45:15,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:45:15,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:45:15,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:45:15,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:45:15,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:45:15,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:45:15,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:45:15,374 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:45:15,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:45:15,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:45:15,378 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:45:15,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:45:15,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:45:15,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:45:15,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:45:15,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:45:15,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:45:15,404 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:45:15,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:45:15,408 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:45:15,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:45:15,408 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:45:15,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:45:15,409 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:45:15,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:45:15,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:45:15,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:45:15,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:45:15,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:45:15,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:45:15,412 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:45:15,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:45:15,412 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:45:15,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:45:15,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:45:15,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:45:15,413 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:45:15,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:45:15,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:45:15,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:45:15,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:45:15,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:45:15,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:45:15,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:45:15,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:45:15,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:45:15,735 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:45:15,749 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:45:15,752 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:45:15,754 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:45:15,754 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:45:15,755 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-10-13 17:45:15,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/518a94610/08228844a0854c788f609ab0b5041585/FLAG0b26f46fd [2019-10-13 17:45:16,288 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:45:16,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-10-13 17:45:16,296 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/518a94610/08228844a0854c788f609ab0b5041585/FLAG0b26f46fd [2019-10-13 17:45:16,624 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/518a94610/08228844a0854c788f609ab0b5041585 [2019-10-13 17:45:16,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:45:16,634 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:45:16,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:45:16,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:45:16,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:45:16,640 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:16,643 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dfc76d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16, skipping insertion in model container [2019-10-13 17:45:16,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:16,652 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:45:16,669 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:45:16,851 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:45:16,855 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:45:16,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:45:16,894 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:45:16,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16 WrapperNode [2019-10-13 17:45:16,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:45:16,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:45:16,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:45:16,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:45:16,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:16,982 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:16,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:16,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:16,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:17,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:17,003 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (1/1) ... [2019-10-13 17:45:17,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:45:17,006 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:45:17,006 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:45:17,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:45:17,007 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:45:17,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:45:17,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:45:17,066 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:45:17,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:45:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:45:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:45:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:45:17,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:45:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:45:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:45:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:45:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:45:17,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:45:17,377 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:45:17,377 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 17:45:17,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:45:17 BoogieIcfgContainer [2019-10-13 17:45:17,378 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:45:17,379 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:45:17,380 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:45:17,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:45:17,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:45:16" (1/3) ... [2019-10-13 17:45:17,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a68f347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:45:17, skipping insertion in model container [2019-10-13 17:45:17,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:45:16" (2/3) ... [2019-10-13 17:45:17,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a68f347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:45:17, skipping insertion in model container [2019-10-13 17:45:17,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:45:17" (3/3) ... [2019-10-13 17:45:17,387 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2019-10-13 17:45:17,408 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:45:17,427 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:45:17,439 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:45:17,465 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:45:17,465 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:45:17,465 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:45:17,465 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:45:17,466 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:45:17,466 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:45:17,466 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:45:17,466 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:45:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-13 17:45:17,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 17:45:17,492 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:17,492 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:17,494 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:17,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:17,499 INFO L82 PathProgramCache]: Analyzing trace with hash 656367922, now seen corresponding path program 1 times [2019-10-13 17:45:17,505 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:17,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394844508] [2019-10-13 17:45:17,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:17,506 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:17,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:17,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:17,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:45:17,671 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394844508] [2019-10-13 17:45:17,672 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:45:17,672 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:45:17,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729833950] [2019-10-13 17:45:17,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:45:17,678 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:45:17,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:45:17,696 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-13 17:45:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:17,828 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2019-10-13 17:45:17,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:45:17,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-13 17:45:17,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:17,841 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:45:17,841 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:45:17,845 INFO L600 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 [2019-10-13 17:45:17,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:45:17,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 17:45:17,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:45:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-13 17:45:17,893 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2019-10-13 17:45:17,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:17,893 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-13 17:45:17,894 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:45:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-13 17:45:17,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 17:45:17,895 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:17,895 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:17,896 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:17,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:17,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1829979950, now seen corresponding path program 1 times [2019-10-13 17:45:17,897 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:17,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123142738] [2019-10-13 17:45:17,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:17,898 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:17,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:45:17,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123142738] [2019-10-13 17:45:17,993 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:45:17,993 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:45:17,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201622516] [2019-10-13 17:45:17,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:45:17,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:17,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:45:17,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:45:17,997 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-10-13 17:45:18,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:18,147 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-10-13 17:45:18,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:45:18,148 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-13 17:45:18,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:18,149 INFO L225 Difference]: With dead ends: 54 [2019-10-13 17:45:18,149 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 17:45:18,151 INFO L600 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 [2019-10-13 17:45:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 17:45:18,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2019-10-13 17:45:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 17:45:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-13 17:45:18,160 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2019-10-13 17:45:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:18,160 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-13 17:45:18,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:45:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-13 17:45:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:45:18,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:18,162 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:18,162 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:18,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1442018896, now seen corresponding path program 1 times [2019-10-13 17:45:18,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:18,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590119639] [2019-10-13 17:45:18,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:18,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:45:18,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590119639] [2019-10-13 17:45:18,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939562641] [2019-10-13 17:45:18,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:45:18,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:45:18,393 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:18,394 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:45:18,394 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108777625] [2019-10-13 17:45:18,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:45:18,398 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:45:18,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:45:18,405 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-10-13 17:45:18,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:18,540 INFO L93 Difference]: Finished difference Result 64 states and 75 transitions. [2019-10-13 17:45:18,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:45:18,541 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-13 17:45:18,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:18,542 INFO L225 Difference]: With dead ends: 64 [2019-10-13 17:45:18,542 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 17:45:18,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:45:18,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 17:45:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2019-10-13 17:45:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 17:45:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2019-10-13 17:45:18,551 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2019-10-13 17:45:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:18,551 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2019-10-13 17:45:18,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:45:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2019-10-13 17:45:18,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 17:45:18,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:18,552 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:45:18,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:18,758 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:18,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:18,759 INFO L82 PathProgramCache]: Analyzing trace with hash 261695650, now seen corresponding path program 2 times [2019-10-13 17:45:18,760 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:18,760 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028315622] [2019-10-13 17:45:18,760 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:18,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-13 17:45:18,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028315622] [2019-10-13 17:45:18,869 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260918507] [2019-10-13 17:45:18,869 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 [2019-10-13 17:45:18,919 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:45:18,920 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:18,921 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:45:18,923 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:45:18,939 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:18,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:45:18,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425863170] [2019-10-13 17:45:18,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:45:18,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:18,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:45:18,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:45:18,941 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 7 states. [2019-10-13 17:45:19,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:19,077 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2019-10-13 17:45:19,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:45:19,077 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2019-10-13 17:45:19,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:19,079 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:45:19,079 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 17:45:19,080 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:45:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 17:45:19,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2019-10-13 17:45:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:45:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-13 17:45:19,088 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 33 [2019-10-13 17:45:19,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:19,088 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-13 17:45:19,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:45:19,088 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-13 17:45:19,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:45:19,090 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:19,090 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:45:19,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:19,293 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:19,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:19,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1563249348, now seen corresponding path program 3 times [2019-10-13 17:45:19,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:19,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203005786] [2019-10-13 17:45:19,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:19,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:19,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:45:19,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203005786] [2019-10-13 17:45:19,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425429035] [2019-10-13 17:45:19,426 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 [2019-10-13 17:45:19,482 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:45:19,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:19,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:45:19,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:45:19,500 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:19,500 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-13 17:45:19,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589828134] [2019-10-13 17:45:19,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:45:19,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:19,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:45:19,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:45:19,502 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 8 states. [2019-10-13 17:45:19,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:19,635 INFO L93 Difference]: Finished difference Result 90 states and 101 transitions. [2019-10-13 17:45:19,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:45:19,636 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2019-10-13 17:45:19,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:19,637 INFO L225 Difference]: With dead ends: 90 [2019-10-13 17:45:19,637 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 17:45:19,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:45:19,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 17:45:19,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2019-10-13 17:45:19,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-13 17:45:19,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2019-10-13 17:45:19,646 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 40 [2019-10-13 17:45:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:19,646 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2019-10-13 17:45:19,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:45:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2019-10-13 17:45:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 17:45:19,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:19,648 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:45:19,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:19,860 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:19,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1161905130, now seen corresponding path program 4 times [2019-10-13 17:45:19,861 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:19,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230973941] [2019-10-13 17:45:19,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:19,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:19,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-13 17:45:20,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230973941] [2019-10-13 17:45:20,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352898564] [2019-10-13 17:45:20,042 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 [2019-10-13 17:45:20,106 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:45:20,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:20,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:45:20,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 17:45:20,173 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:20,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:45:20,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226975557] [2019-10-13 17:45:20,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:45:20,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:20,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:45:20,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:45:20,178 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand 9 states. [2019-10-13 17:45:20,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:20,341 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2019-10-13 17:45:20,342 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:45:20,342 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-10-13 17:45:20,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:20,343 INFO L225 Difference]: With dead ends: 103 [2019-10-13 17:45:20,343 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:45:20,344 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:45:20,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:45:20,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-10-13 17:45:20,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-13 17:45:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-10-13 17:45:20,360 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 47 [2019-10-13 17:45:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:20,361 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-10-13 17:45:20,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:45:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-10-13 17:45:20,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:45:20,363 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:20,363 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:45:20,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:20,571 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:20,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:20,572 INFO L82 PathProgramCache]: Analyzing trace with hash 104059192, now seen corresponding path program 5 times [2019-10-13 17:45:20,572 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:20,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964179751] [2019-10-13 17:45:20,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:20,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:20,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-10-13 17:45:20,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964179751] [2019-10-13 17:45:20,707 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555500593] [2019-10-13 17:45:20,708 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 [2019-10-13 17:45:21,264 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:45:21,265 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:21,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:45:21,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 17:45:21,293 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:21,293 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 17:45:21,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833357927] [2019-10-13 17:45:21,294 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:45:21,294 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:21,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:45:21,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:45:21,295 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 10 states. [2019-10-13 17:45:21,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:21,452 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2019-10-13 17:45:21,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:45:21,453 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 54 [2019-10-13 17:45:21,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:21,454 INFO L225 Difference]: With dead ends: 116 [2019-10-13 17:45:21,454 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 17:45:21,455 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:45:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 17:45:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-13 17:45:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 17:45:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-10-13 17:45:21,472 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 54 [2019-10-13 17:45:21,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:21,472 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-10-13 17:45:21,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:45:21,472 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-10-13 17:45:21,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 17:45:21,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:21,474 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:45:21,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:21,686 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:21,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:21,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1385759114, now seen corresponding path program 6 times [2019-10-13 17:45:21,688 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:21,688 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940172263] [2019-10-13 17:45:21,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:21,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:21,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-13 17:45:21,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940172263] [2019-10-13 17:45:21,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684257003] [2019-10-13 17:45:21,796 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 [2019-10-13 17:45:22,513 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:45:22,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:22,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:45:22,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-13 17:45:22,552 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:22,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-10-13 17:45:22,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835815650] [2019-10-13 17:45:22,553 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:45:22,553 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:22,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:45:22,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:45:22,554 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 11 states. [2019-10-13 17:45:22,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:22,698 INFO L93 Difference]: Finished difference Result 129 states and 140 transitions. [2019-10-13 17:45:22,698 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:45:22,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2019-10-13 17:45:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:22,699 INFO L225 Difference]: With dead ends: 129 [2019-10-13 17:45:22,700 INFO L226 Difference]: Without dead ends: 76 [2019-10-13 17:45:22,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:45:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-13 17:45:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2019-10-13 17:45:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:45:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-13 17:45:22,709 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 61 [2019-10-13 17:45:22,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:22,710 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-13 17:45:22,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:45:22,710 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-13 17:45:22,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:45:22,711 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:22,711 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:45:22,918 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:22,919 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:22,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:22,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1895565740, now seen corresponding path program 7 times [2019-10-13 17:45:22,920 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:22,920 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946581883] [2019-10-13 17:45:22,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:22,921 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:22,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:23,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:23,077 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-10-13 17:45:23,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946581883] [2019-10-13 17:45:23,077 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319980045] [2019-10-13 17:45:23,078 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 [2019-10-13 17:45:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:23,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:45:23,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:23,163 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 17:45:23,163 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:23,163 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:45:23,164 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89286533] [2019-10-13 17:45:23,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:45:23,164 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:23,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:45:23,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:45:23,165 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 12 states. [2019-10-13 17:45:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:23,370 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2019-10-13 17:45:23,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:45:23,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2019-10-13 17:45:23,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:23,371 INFO L225 Difference]: With dead ends: 142 [2019-10-13 17:45:23,371 INFO L226 Difference]: Without dead ends: 83 [2019-10-13 17:45:23,372 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:45:23,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-10-13 17:45:23,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2019-10-13 17:45:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-10-13 17:45:23,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2019-10-13 17:45:23,381 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 68 [2019-10-13 17:45:23,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:23,381 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2019-10-13 17:45:23,382 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:45:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2019-10-13 17:45:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-13 17:45:23,383 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:23,383 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:45:23,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:23,588 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1749223170, now seen corresponding path program 8 times [2019-10-13 17:45:23,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:23,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533193621] [2019-10-13 17:45:23,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:23,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:23,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:23,797 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-13 17:45:23,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533193621] [2019-10-13 17:45:23,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290908878] [2019-10-13 17:45:23,798 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 [2019-10-13 17:45:23,872 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:45:23,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:23,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:45:23,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-13 17:45:23,900 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:23,900 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:45:23,900 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042460923] [2019-10-13 17:45:23,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:45:23,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:23,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:45:23,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:45:23,902 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 13 states. [2019-10-13 17:45:24,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:24,099 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2019-10-13 17:45:24,099 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:45:24,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2019-10-13 17:45:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:24,100 INFO L225 Difference]: With dead ends: 155 [2019-10-13 17:45:24,100 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:45:24,102 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:45:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:45:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2019-10-13 17:45:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-13 17:45:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-13 17:45:24,110 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 75 [2019-10-13 17:45:24,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:24,111 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-13 17:45:24,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:45:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-13 17:45:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:45:24,112 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:24,112 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:45:24,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:24,319 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:24,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1643836448, now seen corresponding path program 9 times [2019-10-13 17:45:24,319 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:24,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700796901] [2019-10-13 17:45:24,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:24,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:24,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2019-10-13 17:45:24,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700796901] [2019-10-13 17:45:24,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310655201] [2019-10-13 17:45:24,464 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:24,950 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:45:24,951 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:24,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:45:24,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-10-13 17:45:24,979 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:24,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-10-13 17:45:24,980 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382907977] [2019-10-13 17:45:24,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:45:24,981 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:24,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:45:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:45:24,982 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 14 states. [2019-10-13 17:45:25,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:25,224 INFO L93 Difference]: Finished difference Result 168 states and 179 transitions. [2019-10-13 17:45:25,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:45:25,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 82 [2019-10-13 17:45:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:25,226 INFO L225 Difference]: With dead ends: 168 [2019-10-13 17:45:25,226 INFO L226 Difference]: Without dead ends: 97 [2019-10-13 17:45:25,227 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:45:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-13 17:45:25,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-10-13 17:45:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-10-13 17:45:25,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2019-10-13 17:45:25,246 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 82 [2019-10-13 17:45:25,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:25,246 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2019-10-13 17:45:25,247 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:45:25,247 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2019-10-13 17:45:25,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-13 17:45:25,248 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:25,248 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:25,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:25,450 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:25,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:25,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1732223602, now seen corresponding path program 10 times [2019-10-13 17:45:25,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:25,451 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032155627] [2019-10-13 17:45:25,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:25,451 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:25,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-10-13 17:45:25,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032155627] [2019-10-13 17:45:25,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631566215] [2019-10-13 17:45:25,654 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:25,736 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:45:25,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:45:25,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:45:25,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:45:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-10-13 17:45:25,773 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:45:25,773 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:45:25,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688648775] [2019-10-13 17:45:25,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:45:25,779 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:45:25,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:45:25,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:45:25,780 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 15 states. [2019-10-13 17:45:26,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:45:26,001 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2019-10-13 17:45:26,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:45:26,002 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 89 [2019-10-13 17:45:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:45:26,003 INFO L225 Difference]: With dead ends: 181 [2019-10-13 17:45:26,003 INFO L226 Difference]: Without dead ends: 104 [2019-10-13 17:45:26,004 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:45:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-10-13 17:45:26,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-10-13 17:45:26,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-13 17:45:26,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-13 17:45:26,012 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 89 [2019-10-13 17:45:26,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:45:26,012 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-13 17:45:26,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:45:26,012 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-13 17:45:26,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 17:45:26,013 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:45:26,014 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:45:26,217 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:45:26,218 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:45:26,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:45:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash -2111467372, now seen corresponding path program 11 times [2019-10-13 17:45:26,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:45:26,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884202206] [2019-10-13 17:45:26,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:26,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:45:26,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:45:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:45:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-10-13 17:45:26,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884202206] [2019-10-13 17:45:26,386 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787616695] [2019-10-13 17:45:26,386 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true