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-tiling/rew.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:50:34,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:50:34,767 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:50:34,779 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:50:34,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:50:34,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:50:34,782 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:50:34,784 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:50:34,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:50:34,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:50:34,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:50:34,788 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:50:34,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:50:34,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:50:34,791 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:50:34,792 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:50:34,793 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:50:34,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:50:34,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:50:34,801 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:50:34,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:50:34,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:50:34,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:50:34,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:50:34,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:50:34,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:50:34,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:50:34,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:50:34,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:50:34,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:50:34,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:50:34,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:50:34,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:50:34,821 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:50:34,826 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:50:34,826 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:50:34,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:50:34,827 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:50:34,827 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:50:34,828 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:50:34,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:50:34,832 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 [2019-10-14 21:50:34,854 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:50:34,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:50:34,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:50:34,860 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:50:34,860 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:50:34,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:50:34,861 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:50:34,861 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:50:34,861 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:50:34,861 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:50:34,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:50:34,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:50:34,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:50:34,864 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:50:34,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:50:34,864 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:50:34,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:50:34,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:50:34,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:50:34,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:50:34,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:50:34,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:50:34,868 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:50:34,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:50:34,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:50:34,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:50:34,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:50:34,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:50:34,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:50:35,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:50:35,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:50:35,174 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:50:35,176 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:50:35,176 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:50:35,177 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/rew.c [2019-10-14 21:50:35,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4f7de2b/19dfbf666b9942fb9f6eaa66474cef0f/FLAG17ef496e6 [2019-10-14 21:50:35,727 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:50:35,729 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/rew.c [2019-10-14 21:50:35,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4f7de2b/19dfbf666b9942fb9f6eaa66474cef0f/FLAG17ef496e6 [2019-10-14 21:50:36,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4f7de2b/19dfbf666b9942fb9f6eaa66474cef0f [2019-10-14 21:50:36,156 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:50:36,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:50:36,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:50:36,158 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:50:36,162 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:50:36,163 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@698417ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36, skipping insertion in model container [2019-10-14 21:50:36,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,176 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:50:36,195 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:50:36,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:50:36,394 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:50:36,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:50:36,425 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:50:36,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36 WrapperNode [2019-10-14 21:50:36,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:50:36,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:50:36,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:50:36,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:50:36,528 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,529 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,536 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,557 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (1/1) ... [2019-10-14 21:50:36,572 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:50:36,573 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:50:36,573 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:50:36,573 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:50:36,574 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (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 [2019-10-14 21:50:36,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:50:36,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:50:36,624 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:50:36,624 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:50:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:50:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 21:50:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:50:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:50:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-14 21:50:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:50:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-14 21:50:36,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:50:36,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:50:36,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:50:36,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:50:36,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:50:36,877 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:50:36,877 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-14 21:50:36,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:50:36 BoogieIcfgContainer [2019-10-14 21:50:36,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:50:36,886 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:50:36,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:50:36,889 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:50:36,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:50:36" (1/3) ... [2019-10-14 21:50:36,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d78d737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:50:36, skipping insertion in model container [2019-10-14 21:50:36,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:50:36" (2/3) ... [2019-10-14 21:50:36,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d78d737 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:50:36, skipping insertion in model container [2019-10-14 21:50:36,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:50:36" (3/3) ... [2019-10-14 21:50:36,898 INFO L109 eAbstractionObserver]: Analyzing ICFG rew.c [2019-10-14 21:50:36,910 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:50:36,915 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:50:36,926 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:50:36,949 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:50:36,949 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:50:36,950 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:50:36,950 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:50:36,950 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:50:36,950 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:50:36,950 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:50:36,950 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:50:36,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-10-14 21:50:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:50:36,970 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:36,971 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:36,974 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:36,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1294486485, now seen corresponding path program 1 times [2019-10-14 21:50:36,988 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:36,989 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893707042] [2019-10-14 21:50:36,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:36,989 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:36,989 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:37,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:37,181 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893707042] [2019-10-14 21:50:37,182 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:37,182 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:50:37,182 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701470281] [2019-10-14 21:50:37,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:50:37,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:37,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:50:37,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:50:37,205 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2019-10-14 21:50:37,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:37,314 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2019-10-14 21:50:37,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:50:37,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-14 21:50:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:37,327 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:50:37,327 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 21:50:37,330 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 [2019-10-14 21:50:37,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 21:50:37,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 21:50:37,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 21:50:37,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2019-10-14 21:50:37,364 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2019-10-14 21:50:37,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:37,365 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2019-10-14 21:50:37,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:50:37,365 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2019-10-14 21:50:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-14 21:50:37,366 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:37,366 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:37,367 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1653126776, now seen corresponding path program 1 times [2019-10-14 21:50:37,368 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:37,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210398636] [2019-10-14 21:50:37,368 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:37,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:37,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:37,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:37,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:37,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210398636] [2019-10-14 21:50:37,502 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:37,502 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:50:37,502 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883771699] [2019-10-14 21:50:37,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:50:37,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:37,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:50:37,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:50:37,505 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2019-10-14 21:50:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:37,613 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-10-14 21:50:37,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:50:37,614 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-14 21:50:37,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:37,615 INFO L225 Difference]: With dead ends: 41 [2019-10-14 21:50:37,615 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:50:37,616 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 [2019-10-14 21:50:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:50:37,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-10-14 21:50:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 21:50:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-10-14 21:50:37,624 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2019-10-14 21:50:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:37,625 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-10-14 21:50:37,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:50:37,625 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-10-14 21:50:37,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:50:37,626 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:37,626 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:37,626 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:37,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1007604157, now seen corresponding path program 1 times [2019-10-14 21:50:37,627 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:37,627 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121908571] [2019-10-14 21:50:37,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:37,628 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:37,628 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:37,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121908571] [2019-10-14 21:50:37,752 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:50:37,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 21:50:37,752 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307529328] [2019-10-14 21:50:37,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:50:37,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:37,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:50:37,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:50:37,754 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2019-10-14 21:50:37,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:37,863 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-10-14 21:50:37,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:50:37,864 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-14 21:50:37,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:37,865 INFO L225 Difference]: With dead ends: 38 [2019-10-14 21:50:37,866 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 21:50:37,867 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:50:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 21:50:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 21:50:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 21:50:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2019-10-14 21:50:37,882 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2019-10-14 21:50:37,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:37,883 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2019-10-14 21:50:37,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:50:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2019-10-14 21:50:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:50:37,884 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:37,884 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:37,885 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:37,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:37,886 INFO L82 PathProgramCache]: Analyzing trace with hash -2051596356, now seen corresponding path program 1 times [2019-10-14 21:50:37,887 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:37,887 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817449241] [2019-10-14 21:50:37,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:37,888 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:37,889 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:38,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817449241] [2019-10-14 21:50:38,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037455452] [2019-10-14 21:50:38,313 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 [2019-10-14 21:50:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:38,363 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:50:38,370 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:38,479 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:50:38,480 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:38,495 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:38,496 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:38,496 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-10-14 21:50:38,588 INFO L341 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2019-10-14 21:50:38,589 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2019-10-14 21:50:38,590 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:38,600 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:38,602 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:50:38,602 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:33 [2019-10-14 21:50:38,722 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:38,723 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2019-10-14 21:50:38,727 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:38,735 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:38,737 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:38,737 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:40, output treesize:7 [2019-10-14 21:50:38,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:38,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:38,823 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:38,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-10-14 21:50:38,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985952886] [2019-10-14 21:50:38,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:50:38,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:38,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:50:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:50:38,827 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 19 states. [2019-10-14 21:50:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:40,044 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-10-14 21:50:40,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:50:40,046 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2019-10-14 21:50:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:40,048 INFO L225 Difference]: With dead ends: 42 [2019-10-14 21:50:40,048 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:50:40,049 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:50:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:50:40,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2019-10-14 21:50:40,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 21:50:40,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-14 21:50:40,058 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2019-10-14 21:50:40,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:40,059 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-14 21:50:40,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:50:40,059 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-14 21:50:40,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:50:40,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:40,060 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:40,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:40,269 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash -730987952, now seen corresponding path program 1 times [2019-10-14 21:50:40,269 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:40,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019334777] [2019-10-14 21:50:40,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:40,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:40,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:40,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:40,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019334777] [2019-10-14 21:50:40,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577567039] [2019-10-14 21:50:40,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:50:40,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:40,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-14 21:50:40,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:40,593 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:50:40,594 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:40,599 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:40,600 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:40,600 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-10-14 21:50:40,758 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-10-14 21:50:40,759 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:40,765 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:40,765 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:40,766 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-10-14 21:50:40,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:40,850 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:40,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-10-14 21:50:40,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712941817] [2019-10-14 21:50:40,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 21:50:40,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 21:50:40,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:50:40,852 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 23 states. [2019-10-14 21:50:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:50:54,211 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2019-10-14 21:50:54,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:50:54,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-14 21:50:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:50:54,216 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:50:54,216 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:50:54,217 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2019-10-14 21:50:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:50:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 49. [2019-10-14 21:50:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:50:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-14 21:50:54,241 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 30 [2019-10-14 21:50:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:50:54,242 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-14 21:50:54,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 21:50:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-14 21:50:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:50:54,246 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:50:54,246 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:50:54,447 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:50:54,448 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:50:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:50:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash 515182859, now seen corresponding path program 2 times [2019-10-14 21:50:54,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:50:54,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177398669] [2019-10-14 21:50:54,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:54,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:50:54,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:50:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:50:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:54,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177398669] [2019-10-14 21:50:54,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676522476] [2019-10-14 21:50:54,653 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 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 [2019-10-14 21:50:54,706 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:50:54,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:50:54,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 21:50:54,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:50:54,762 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-10-14 21:50:54,762 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:54,771 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:54,771 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:54,772 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:24 [2019-10-14 21:50:54,839 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:54,840 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2019-10-14 21:50:54,841 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:54,851 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:54,852 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-10-14 21:50:54,853 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:36 [2019-10-14 21:50:55,108 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:50:55,110 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:55,110 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 10 [2019-10-14 21:50:55,111 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:50:55,117 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:50:55,117 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:50:55,118 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:7 [2019-10-14 21:50:55,143 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:50:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:50:55,201 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:50:55,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2019-10-14 21:50:55,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697948968] [2019-10-14 21:50:55,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 21:50:55,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:50:55,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 21:50:55,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:50:55,202 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 26 states. [2019-10-14 21:51:08,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:08,466 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2019-10-14 21:51:08,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:51:08,467 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 34 [2019-10-14 21:51:08,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:08,469 INFO L225 Difference]: With dead ends: 84 [2019-10-14 21:51:08,469 INFO L226 Difference]: Without dead ends: 82 [2019-10-14 21:51:08,471 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:51:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-10-14 21:51:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 41. [2019-10-14 21:51:08,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:51:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-10-14 21:51:08,480 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 34 [2019-10-14 21:51:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:08,481 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-10-14 21:51:08,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 21:51:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-10-14 21:51:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:51:08,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:08,482 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:08,691 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:08,692 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:08,692 INFO L82 PathProgramCache]: Analyzing trace with hash 783487204, now seen corresponding path program 3 times [2019-10-14 21:51:08,692 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:08,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214026921] [2019-10-14 21:51:08,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:08,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:08,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:08,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:51:08,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214026921] [2019-10-14 21:51:08,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503993863] [2019-10-14 21:51:08,815 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 [2019-10-14 21:51:08,861 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:51:08,861 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:51:08,862 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:51:08,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:08,922 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:51:08,923 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:08,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2019-10-14 21:51:08,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800222899] [2019-10-14 21:51:08,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:51:08,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:08,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:51:08,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:51:08,925 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 13 states. [2019-10-14 21:51:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:09,170 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2019-10-14 21:51:09,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:51:09,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2019-10-14 21:51:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:09,172 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:51:09,172 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:51:09,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:51:09,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:51:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2019-10-14 21:51:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 21:51:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2019-10-14 21:51:09,182 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 38 [2019-10-14 21:51:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:09,183 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2019-10-14 21:51:09,183 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:51:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2019-10-14 21:51:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:51:09,184 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:09,185 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:09,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:09,393 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:09,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1309226143, now seen corresponding path program 4 times [2019-10-14 21:51:09,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:09,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069377201] [2019-10-14 21:51:09,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:09,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:09,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:51:09,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069377201] [2019-10-14 21:51:09,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850898415] [2019-10-14 21:51:09,576 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 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 [2019-10-14 21:51:09,641 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:51:09,642 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:51:09,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:51:09,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:09,712 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2019-10-14 21:51:09,712 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:09,719 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:09,720 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:09,721 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2019-10-14 21:51:09,986 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2019-10-14 21:51:09,986 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:51:09,992 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:51:09,992 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:51:09,993 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2019-10-14 21:51:10,013 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:51:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:10,053 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:10,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2019-10-14 21:51:10,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181776750] [2019-10-14 21:51:10,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:51:10,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:51:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:51:10,055 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 27 states.