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_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:43:37,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:43:37,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:43:37,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:43:37,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:43:37,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:43:37,712 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:43:37,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:43:37,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:43:37,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:43:37,729 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:43:37,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:43:37,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:43:37,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:43:37,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:43:37,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:43:37,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:43:37,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:43:37,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:43:37,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:43:37,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:43:37,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:43:37,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:43:37,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:43:37,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:43:37,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:43:37,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:43:37,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:43:37,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:43:37,761 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:43:37,761 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:43:37,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:43:37,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:43:37,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:43:37,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:43:37,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:43:37,767 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 17:43:37,781 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:43:37,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:43:37,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:43:37,783 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:43:37,783 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:43:37,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:43:37,784 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:43:37,784 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:43:37,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:43:37,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:43:37,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:43:37,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:43:37,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:43:37,785 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:43:37,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:43:37,786 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:43:37,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:43:37,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:43:37,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:43:37,787 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:43:37,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:43:37,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:43:37,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:43:37,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:43:37,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:43:37,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:43:37,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:43:37,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:43:37,788 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:43:38,103 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:43:38,124 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:43:38,127 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:43:38,129 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:43:38,129 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:43:38,130 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-10-13 17:43:38,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f6dc131/085cae07b081466a84991a9aec2714c9/FLAG1737d24dd [2019-10-13 17:43:38,688 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:43:38,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-10-13 17:43:38,695 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f6dc131/085cae07b081466a84991a9aec2714c9/FLAG1737d24dd [2019-10-13 17:43:39,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/48f6dc131/085cae07b081466a84991a9aec2714c9 [2019-10-13 17:43:39,128 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:43:39,130 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:43:39,131 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:39,131 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:43:39,135 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:43:39,136 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b1f68c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39, skipping insertion in model container [2019-10-13 17:43:39,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,146 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:43:39,161 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:43:39,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:39,336 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:43:39,367 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:39,471 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:43:39,472 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39 WrapperNode [2019-10-13 17:43:39,472 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:39,473 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:43:39,473 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:43:39,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:43:39,485 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,492 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (1/1) ... [2019-10-13 17:43:39,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:43:39,509 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:43:39,509 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:43:39,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:43:39,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (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 17:43:39,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:43:39,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:43:39,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:43:39,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:43:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:43:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:43:39,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:43:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:43:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:43:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:43:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:43:39,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:43:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:43:39,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:43:39,875 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:43:39,875 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 17:43:39,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:39 BoogieIcfgContainer [2019-10-13 17:43:39,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:43:39,878 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:43:39,878 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:43:39,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:43:39,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:43:39" (1/3) ... [2019-10-13 17:43:39,882 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b93ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:39, skipping insertion in model container [2019-10-13 17:43:39,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:39" (2/3) ... [2019-10-13 17:43:39,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30b93ad4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:39, skipping insertion in model container [2019-10-13 17:43:39,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:39" (3/3) ... [2019-10-13 17:43:39,885 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-10-13 17:43:39,895 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:43:39,902 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:43:39,913 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:43:39,940 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:43:39,940 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:43:39,940 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:43:39,940 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:43:39,940 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:43:39,941 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:43:39,941 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:43:39,941 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:43:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-13 17:43:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:39,967 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,968 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:39,970 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,977 INFO L82 PathProgramCache]: Analyzing trace with hash -526773211, now seen corresponding path program 1 times [2019-10-13 17:43:39,986 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,987 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311175571] [2019-10-13 17:43:39,987 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,988 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,143 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 17:43:40,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311175571] [2019-10-13 17:43:40,144 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:40,145 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:43:40,145 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282996934] [2019-10-13 17:43:40,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:43:40,150 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:43:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:43:40,180 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-13 17:43:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,297 INFO L93 Difference]: Finished difference Result 56 states and 79 transitions. [2019-10-13 17:43:40,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:43:40,299 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:43:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,310 INFO L225 Difference]: With dead ends: 56 [2019-10-13 17:43:40,310 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:43:40,316 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 17:43:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:43:40,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 17:43:40,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:43:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-13 17:43:40,368 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 16 [2019-10-13 17:43:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,369 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-13 17:43:40,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:43:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-13 17:43:40,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:40,371 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,371 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:40,372 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,372 INFO L82 PathProgramCache]: Analyzing trace with hash -777624222, now seen corresponding path program 1 times [2019-10-13 17:43:40,373 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860917678] [2019-10-13 17:43:40,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,376 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,468 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 17:43:40,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860917678] [2019-10-13 17:43:40,469 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:40,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:40,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24933339] [2019-10-13 17:43:40,471 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:40,471 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:40,472 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2019-10-13 17:43:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,586 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-13 17:43:40,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:40,587 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 17:43:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,588 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:43:40,588 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:43:40,590 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 17:43:40,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:43:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 17:43:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:43:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-13 17:43:40,601 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-10-13 17:43:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,602 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-13 17:43:40,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:40,602 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-13 17:43:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 17:43:40,603 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,604 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:40,604 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2101592964, now seen corresponding path program 1 times [2019-10-13 17:43:40,605 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877994688] [2019-10-13 17:43:40,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,605 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:40,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877994688] [2019-10-13 17:43:40,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:40,705 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:43:40,705 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806060201] [2019-10-13 17:43:40,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:43:40,706 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:43:40,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:43:40,707 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2019-10-13 17:43:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,873 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2019-10-13 17:43:40,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:43:40,875 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-13 17:43:40,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,876 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:43:40,877 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:43:40,879 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:40,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:43:40,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2019-10-13 17:43:40,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:43:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-13 17:43:40,891 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 18 [2019-10-13 17:43:40,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,892 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-13 17:43:40,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:43:40,892 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-13 17:43:40,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 17:43:40,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,893 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] [2019-10-13 17:43:40,894 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1818591568, now seen corresponding path program 1 times [2019-10-13 17:43:40,894 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700541264] [2019-10-13 17:43:40,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,895 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:41,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700541264] [2019-10-13 17:43:41,015 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:41,016 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 17:43:41,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434562109] [2019-10-13 17:43:41,017 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:43:41,017 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:43:41,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:41,018 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2019-10-13 17:43:41,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,254 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2019-10-13 17:43:41,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:43:41,257 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2019-10-13 17:43:41,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,258 INFO L225 Difference]: With dead ends: 62 [2019-10-13 17:43:41,258 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:43:41,260 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:43:41,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:43:41,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2019-10-13 17:43:41,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:43:41,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2019-10-13 17:43:41,270 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 21 [2019-10-13 17:43:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,270 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2019-10-13 17:43:41,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:43:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2019-10-13 17:43:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 17:43:41,271 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,271 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 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 17:43:41,272 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash 334453631, now seen corresponding path program 1 times [2019-10-13 17:43:41,272 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,272 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968907364] [2019-10-13 17:43:41,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,273 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:43:41,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968907364] [2019-10-13 17:43:41,385 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857009102] [2019-10-13 17:43:41,385 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 17:43:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 17:43:41,494 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:41,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:43:41,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679558794] [2019-10-13 17:43:41,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:43:41,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:43:41,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:43:41,497 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2019-10-13 17:43:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,821 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2019-10-13 17:43:41,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:43:41,822 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-10-13 17:43:41,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,824 INFO L225 Difference]: With dead ends: 86 [2019-10-13 17:43:41,825 INFO L226 Difference]: Without dead ends: 62 [2019-10-13 17:43:41,825 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:41,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-13 17:43:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2019-10-13 17:43:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 17:43:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2019-10-13 17:43:41,835 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 26 [2019-10-13 17:43:41,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,835 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2019-10-13 17:43:41,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:43:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2019-10-13 17:43:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:43:41,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,836 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:42,040 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:42,040 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:42,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:42,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1076752728, now seen corresponding path program 2 times [2019-10-13 17:43:42,041 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:42,041 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487588669] [2019-10-13 17:43:42,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:42,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,247 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:43:42,247 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487588669] [2019-10-13 17:43:42,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6954785] [2019-10-13 17:43:42,248 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 17:43:42,302 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:42,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:42,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:43:42,306 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:42,352 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:43:42,353 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:42,356 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 13 [2019-10-13 17:43:42,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408437773] [2019-10-13 17:43:42,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:42,358 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:42,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:42,359 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 13 states. [2019-10-13 17:43:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:42,826 INFO L93 Difference]: Finished difference Result 145 states and 198 transitions. [2019-10-13 17:43:42,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:43:42,827 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2019-10-13 17:43:42,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:42,829 INFO L225 Difference]: With dead ends: 145 [2019-10-13 17:43:42,829 INFO L226 Difference]: Without dead ends: 116 [2019-10-13 17:43:42,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:43:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-13 17:43:42,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 63. [2019-10-13 17:43:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-13 17:43:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2019-10-13 17:43:42,864 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 34 [2019-10-13 17:43:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:42,864 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2019-10-13 17:43:42,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2019-10-13 17:43:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:43:42,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:42,869 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:43,072 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,073 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:43,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:43,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1104086922, now seen corresponding path program 1 times [2019-10-13 17:43:43,074 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:43,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441775856] [2019-10-13 17:43:43,075 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,075 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-13 17:43:43,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441775856] [2019-10-13 17:43:43,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178737155] [2019-10-13 17:43:43,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,233 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:43,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:43:43,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:43,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-13 17:43:43,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577993105] [2019-10-13 17:43:43,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:43,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:43,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:43,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:43,315 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand 13 states. [2019-10-13 17:43:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:43,689 INFO L93 Difference]: Finished difference Result 178 states and 250 transitions. [2019-10-13 17:43:43,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:43:43,690 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-10-13 17:43:43,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:43,692 INFO L225 Difference]: With dead ends: 178 [2019-10-13 17:43:43,692 INFO L226 Difference]: Without dead ends: 130 [2019-10-13 17:43:43,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:43,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-13 17:43:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 51. [2019-10-13 17:43:43,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:43:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-10-13 17:43:43,703 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 36 [2019-10-13 17:43:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:43,703 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-10-13 17:43:43,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-10-13 17:43:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 17:43:43,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:43,705 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:43,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,916 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:43,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1653847887, now seen corresponding path program 3 times [2019-10-13 17:43:43,917 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:43,917 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550495771] [2019-10-13 17:43:43,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:43:44,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550495771] [2019-10-13 17:43:44,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577318048] [2019-10-13 17:43:44,122 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 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 17:43:44,186 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:43:44,186 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:44,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:43:44,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:44,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 17:43:44,242 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:44,242 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 14 [2019-10-13 17:43:44,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104602252] [2019-10-13 17:43:44,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:44,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:44,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:44,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:44,244 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 14 states. [2019-10-13 17:43:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:44,738 INFO L93 Difference]: Finished difference Result 160 states and 221 transitions. [2019-10-13 17:43:44,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:43:44,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2019-10-13 17:43:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:44,740 INFO L225 Difference]: With dead ends: 160 [2019-10-13 17:43:44,740 INFO L226 Difference]: Without dead ends: 147 [2019-10-13 17:43:44,741 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:43:44,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2019-10-13 17:43:44,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2019-10-13 17:43:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-13 17:43:44,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 117 transitions. [2019-10-13 17:43:44,755 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 117 transitions. Word has length 41 [2019-10-13 17:43:44,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:44,756 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 117 transitions. [2019-10-13 17:43:44,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:44,756 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 117 transitions. [2019-10-13 17:43:44,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:43:44,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:44,758 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:44,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,969 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:44,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:44,969 INFO L82 PathProgramCache]: Analyzing trace with hash -510083147, now seen corresponding path program 1 times [2019-10-13 17:43:44,969 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:44,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260710412] [2019-10-13 17:43:44,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,104 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-13 17:43:45,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260710412] [2019-10-13 17:43:45,105 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934886990] [2019-10-13 17:43:45,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:43:45,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 17:43:45,202 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:45,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2019-10-13 17:43:45,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973565606] [2019-10-13 17:43:45,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:45,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:45,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:45,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:45,204 INFO L87 Difference]: Start difference. First operand 85 states and 117 transitions. Second operand 13 states. [2019-10-13 17:43:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:45,622 INFO L93 Difference]: Finished difference Result 366 states and 536 transitions. [2019-10-13 17:43:45,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 17:43:45,623 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2019-10-13 17:43:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:45,625 INFO L225 Difference]: With dead ends: 366 [2019-10-13 17:43:45,625 INFO L226 Difference]: Without dead ends: 298 [2019-10-13 17:43:45,626 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:43:45,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2019-10-13 17:43:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 93. [2019-10-13 17:43:45,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-13 17:43:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2019-10-13 17:43:45,643 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 128 transitions. Word has length 44 [2019-10-13 17:43:45,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:45,643 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 128 transitions. [2019-10-13 17:43:45,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 128 transitions. [2019-10-13 17:43:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 17:43:45,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:45,645 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:45,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,849 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:45,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash -396829064, now seen corresponding path program 2 times [2019-10-13 17:43:45,850 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:45,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868470234] [2019-10-13 17:43:45,850 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,008 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-13 17:43:46,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868470234] [2019-10-13 17:43:46,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611237539] [2019-10-13 17:43:46,008 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 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 17:43:46,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:46,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:46,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:43:46,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-13 17:43:46,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:46,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2019-10-13 17:43:46,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602204748] [2019-10-13 17:43:46,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:43:46,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:46,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:43:46,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:46,152 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand 18 states. [2019-10-13 17:43:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:47,247 INFO L93 Difference]: Finished difference Result 454 states and 670 transitions. [2019-10-13 17:43:47,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-10-13 17:43:47,247 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2019-10-13 17:43:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:47,249 INFO L225 Difference]: With dead ends: 454 [2019-10-13 17:43:47,250 INFO L226 Difference]: Without dead ends: 269 [2019-10-13 17:43:47,255 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=718, Invalid=2144, Unknown=0, NotChecked=0, Total=2862 [2019-10-13 17:43:47,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2019-10-13 17:43:47,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 105. [2019-10-13 17:43:47,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-13 17:43:47,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2019-10-13 17:43:47,293 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 49 [2019-10-13 17:43:47,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:47,293 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2019-10-13 17:43:47,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:43:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2019-10-13 17:43:47,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:43:47,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:47,295 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:47,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:47,500 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:47,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:47,501 INFO L82 PathProgramCache]: Analyzing trace with hash -611115395, now seen corresponding path program 4 times [2019-10-13 17:43:47,501 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:47,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133136282] [2019-10-13 17:43:47,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,502 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:47,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,633 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-13 17:43:47,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133136282] [2019-10-13 17:43:47,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140752465] [2019-10-13 17:43:47,633 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 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 17:43:47,690 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:47,691 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:47,692 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:47,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:47,805 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-10-13 17:43:47,805 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:47,806 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-10-13 17:43:47,806 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35576407] [2019-10-13 17:43:47,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:43:47,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:47,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:43:47,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:47,807 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand 19 states. [2019-10-13 17:43:48,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:48,866 INFO L93 Difference]: Finished difference Result 350 states and 472 transitions. [2019-10-13 17:43:48,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:43:48,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2019-10-13 17:43:48,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:48,868 INFO L225 Difference]: With dead ends: 350 [2019-10-13 17:43:48,868 INFO L226 Difference]: Without dead ends: 266 [2019-10-13 17:43:48,871 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=736, Invalid=1814, Unknown=0, NotChecked=0, Total=2550 [2019-10-13 17:43:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2019-10-13 17:43:48,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 114. [2019-10-13 17:43:48,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-13 17:43:48,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 147 transitions. [2019-10-13 17:43:48,884 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 147 transitions. Word has length 63 [2019-10-13 17:43:48,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:48,885 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 147 transitions. [2019-10-13 17:43:48,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:43:48,885 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 147 transitions. [2019-10-13 17:43:48,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 17:43:48,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:48,887 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:49,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:49,092 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:49,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:49,093 INFO L82 PathProgramCache]: Analyzing trace with hash 215199622, now seen corresponding path program 5 times [2019-10-13 17:43:49,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:49,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763265873] [2019-10-13 17:43:49,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:49,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 119 proven. 507 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-10-13 17:43:49,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763265873] [2019-10-13 17:43:49,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675752439] [2019-10-13 17:43:49,672 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 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 17:43:49,743 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 17:43:49,743 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:49,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:43:49,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:49,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 436 proven. 55 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-10-13 17:43:49,958 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:49,958 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 38 [2019-10-13 17:43:49,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359897015] [2019-10-13 17:43:49,959 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 17:43:49,959 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:49,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 17:43:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1262, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 17:43:49,961 INFO L87 Difference]: Start difference. First operand 114 states and 147 transitions. Second operand 38 states. [2019-10-13 17:43:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:53,982 INFO L93 Difference]: Finished difference Result 513 states and 733 transitions. [2019-10-13 17:43:53,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2019-10-13 17:43:53,983 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 107 [2019-10-13 17:43:53,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:53,987 INFO L225 Difference]: With dead ends: 513 [2019-10-13 17:43:53,987 INFO L226 Difference]: Without dead ends: 419 [2019-10-13 17:43:53,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3226 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2559, Invalid=10781, Unknown=0, NotChecked=0, Total=13340 [2019-10-13 17:43:53,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2019-10-13 17:43:54,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 205. [2019-10-13 17:43:54,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-10-13 17:43:54,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 263 transitions. [2019-10-13 17:43:54,012 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 263 transitions. Word has length 107 [2019-10-13 17:43:54,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:54,012 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 263 transitions. [2019-10-13 17:43:54,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 17:43:54,012 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 263 transitions. [2019-10-13 17:43:54,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-13 17:43:54,014 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:54,014 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 28, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:54,214 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:54,215 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:54,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:54,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1872470850, now seen corresponding path program 6 times [2019-10-13 17:43:54,216 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:54,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967463286] [2019-10-13 17:43:54,216 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:54,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:54,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 20 proven. 1198 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-10-13 17:43:54,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967463286] [2019-10-13 17:43:54,561 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40545212] [2019-10-13 17:43:54,562 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 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 17:43:54,685 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-10-13 17:43:54,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:54,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:54,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:54,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:43:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 1204 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-10-13 17:43:54,775 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:54,775 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 19 [2019-10-13 17:43:54,776 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666399063] [2019-10-13 17:43:54,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:43:54,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:54,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:43:54,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:43:54,777 INFO L87 Difference]: Start difference. First operand 205 states and 263 transitions. Second operand 19 states. [2019-10-13 17:43:55,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:55,780 INFO L93 Difference]: Finished difference Result 331 states and 424 transitions. [2019-10-13 17:43:55,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 17:43:55,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 137 [2019-10-13 17:43:55,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:55,785 INFO L225 Difference]: With dead ends: 331 [2019-10-13 17:43:55,785 INFO L226 Difference]: Without dead ends: 318 [2019-10-13 17:43:55,787 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=654, Invalid=1896, Unknown=0, NotChecked=0, Total=2550 [2019-10-13 17:43:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2019-10-13 17:43:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 229. [2019-10-13 17:43:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2019-10-13 17:43:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2019-10-13 17:43:55,820 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 137 [2019-10-13 17:43:55,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:55,822 INFO L462 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2019-10-13 17:43:55,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:43:55,822 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2019-10-13 17:43:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 17:43:55,824 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:55,824 INFO L380 BasicCegarLoop]: trace histogram [35, 35, 35, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:56,036 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:56,037 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash 586009211, now seen corresponding path program 7 times [2019-10-13 17:43:56,037 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:56,037 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077659241] [2019-10-13 17:43:56,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:56,038 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:56,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:56,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 672 proven. 159 refuted. 0 times theorem prover too weak. 1390 trivial. 0 not checked. [2019-10-13 17:43:56,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077659241] [2019-10-13 17:43:56,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573974602] [2019-10-13 17:43:56,263 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 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 17:43:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:56,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:56,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:56,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2221 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2157 trivial. 0 not checked. [2019-10-13 17:43:56,571 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:56,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 25 [2019-10-13 17:43:56,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890603416] [2019-10-13 17:43:56,573 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:43:56,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:56,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:43:56,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:43:56,574 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand 25 states. [2019-10-13 17:43:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:58,740 INFO L93 Difference]: Finished difference Result 487 states and 638 transitions. [2019-10-13 17:43:58,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-13 17:43:58,741 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 161 [2019-10-13 17:43:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:58,743 INFO L225 Difference]: With dead ends: 487 [2019-10-13 17:43:58,744 INFO L226 Difference]: Without dead ends: 281 [2019-10-13 17:43:58,747 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2106, Invalid=5034, Unknown=0, NotChecked=0, Total=7140 [2019-10-13 17:43:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-10-13 17:43:58,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 234. [2019-10-13 17:43:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2019-10-13 17:43:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2019-10-13 17:43:58,769 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 161 [2019-10-13 17:43:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:58,770 INFO L462 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2019-10-13 17:43:58,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:43:58,770 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2019-10-13 17:43:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 17:43:58,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:58,783 INFO L380 BasicCegarLoop]: trace histogram [36, 36, 36, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:58,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:58,994 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:58,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash -635882284, now seen corresponding path program 8 times [2019-10-13 17:43:58,995 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:58,995 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047604904] [2019-10-13 17:43:58,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:58,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:58,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 23 proven. 1975 refuted. 0 times theorem prover too weak. 353 trivial. 0 not checked. [2019-10-13 17:43:59,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047604904] [2019-10-13 17:43:59,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537908844] [2019-10-13 17:43:59,252 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:59,385 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:59,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:59,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:43:59,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2351 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2019-10-13 17:43:59,441 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:59,442 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 20 [2019-10-13 17:43:59,442 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092108338] [2019-10-13 17:43:59,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:43:59,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:59,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:43:59,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:43:59,444 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand 20 states. [2019-10-13 17:44:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:00,654 INFO L93 Difference]: Finished difference Result 573 states and 748 transitions. [2019-10-13 17:44:00,654 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-13 17:44:00,654 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2019-10-13 17:44:00,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:00,657 INFO L225 Difference]: With dead ends: 573 [2019-10-13 17:44:00,657 INFO L226 Difference]: Without dead ends: 364 [2019-10-13 17:44:00,659 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=826, Invalid=2366, Unknown=0, NotChecked=0, Total=3192 [2019-10-13 17:44:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2019-10-13 17:44:00,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 260. [2019-10-13 17:44:00,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2019-10-13 17:44:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 336 transitions. [2019-10-13 17:44:00,685 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 336 transitions. Word has length 166 [2019-10-13 17:44:00,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:00,685 INFO L462 AbstractCegarLoop]: Abstraction has 260 states and 336 transitions. [2019-10-13 17:44:00,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:44:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 336 transitions. [2019-10-13 17:44:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-13 17:44:00,688 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:00,688 INFO L380 BasicCegarLoop]: trace histogram [43, 43, 43, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:00,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:00,892 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:00,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1028235619, now seen corresponding path program 9 times [2019-10-13 17:44:00,893 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:00,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016383033] [2019-10-13 17:44:00,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:00,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:00,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 1115 proven. 1903 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2019-10-13 17:44:01,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016383033] [2019-10-13 17:44:01,754 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462476532] [2019-10-13 17:44:01,755 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:02,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-10-13 17:44:02,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:02,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:44:02,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:02,145 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:44:02,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:44:02,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:44:02,201 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:44:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3313 backedges. 964 proven. 92 refuted. 0 times theorem prover too weak. 2257 trivial. 0 not checked. [2019-10-13 17:44:02,283 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:02,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 14] total 41 [2019-10-13 17:44:02,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224418131] [2019-10-13 17:44:02,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-13 17:44:02,285 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:02,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-13 17:44:02,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1446, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 17:44:02,286 INFO L87 Difference]: Start difference. First operand 260 states and 336 transitions. Second operand 41 states.