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/mlceu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:50:39,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:50:39,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:50:39,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:50:39,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:50:39,717 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:50:39,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:50:39,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:50:39,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:50:39,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:50:39,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:50:39,739 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:50:39,739 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:50:39,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:50:39,744 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:50:39,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:50:39,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:50:39,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:50:39,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:50:39,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:50:39,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:50:39,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:50:39,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:50:39,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:50:39,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 17:50:39,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 17:50:39,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 17:50:39,768 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 17:50:39,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 17:50:39,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 17:50:39,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:50:39,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:50:39,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:50:39,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:50:39,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:50:39,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:50:39,774 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:50:39,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:50:39,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:50:39,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:50:39,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:50:39,777 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 17:50:39,791 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:50:39,791 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:50:39,792 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:50:39,792 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:50:39,793 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:50:39,793 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:50:39,793 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:50:39,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:50:39,793 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:50:39,794 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:50:39,794 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:50:39,794 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:50:39,794 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:50:39,794 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:50:39,794 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:50:39,795 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:50:39,795 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:50:39,795 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:50:39,795 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:50:39,795 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:50:39,796 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:50:39,796 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:50:39,796 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:50:39,796 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:50:39,796 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:50:39,797 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:50:39,797 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:50:39,797 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:50:39,797 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:50:40,050 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:50:40,069 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:50:40,072 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:50:40,074 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:50:40,074 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:50:40,075 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mlceu.c [2019-10-13 17:50:40,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64abe81fd/64170b2a34954133ae33b4adf6aa17a2/FLAG9888aa26e [2019-10-13 17:50:40,601 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:50:40,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/mlceu.c [2019-10-13 17:50:40,609 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64abe81fd/64170b2a34954133ae33b4adf6aa17a2/FLAG9888aa26e [2019-10-13 17:50:40,970 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64abe81fd/64170b2a34954133ae33b4adf6aa17a2 [2019-10-13 17:50:40,981 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:50:40,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:50:40,983 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:40,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:50:40,987 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:50:40,988 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:40" (1/1) ... [2019-10-13 17:50:40,991 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7adda455 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:40, skipping insertion in model container [2019-10-13 17:50:40,992 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:50:40" (1/1) ... [2019-10-13 17:50:40,999 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:50:41,022 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:50:41,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:41,248 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:50:41,264 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:50:41,280 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:50:41,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41 WrapperNode [2019-10-13 17:50:41,280 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:50:41,281 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:50:41,281 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:50:41,281 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:50:41,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (1/1) ... [2019-10-13 17:50:41,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (1/1) ... [2019-10-13 17:50:41,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (1/1) ... [2019-10-13 17:50:41,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (1/1) ... [2019-10-13 17:50:41,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (1/1) ... [2019-10-13 17:50:41,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (1/1) ... [2019-10-13 17:50:41,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (1/1) ... [2019-10-13 17:50:41,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:50:41,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:50:41,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:50:41,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:50:41,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (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 17:50:41,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:50:41,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:50:41,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:50:41,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:50:41,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:50:41,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 17:50:41,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:50:41,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:50:41,455 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-13 17:50:41,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:50:41,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-13 17:50:41,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:50:41,456 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:50:41,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:50:41,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:50:41,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:50:41,713 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:50:41,713 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-13 17:50:41,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:41 BoogieIcfgContainer [2019-10-13 17:50:41,715 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:50:41,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:50:41,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:50:41,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:50:41,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:50:40" (1/3) ... [2019-10-13 17:50:41,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f7eaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:41, skipping insertion in model container [2019-10-13 17:50:41,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:50:41" (2/3) ... [2019-10-13 17:50:41,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f7eaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:50:41, skipping insertion in model container [2019-10-13 17:50:41,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:50:41" (3/3) ... [2019-10-13 17:50:41,723 INFO L109 eAbstractionObserver]: Analyzing ICFG mlceu.c [2019-10-13 17:50:41,734 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:50:41,741 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:50:41,753 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:50:41,780 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:50:41,780 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:50:41,781 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:50:41,781 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:50:41,781 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:50:41,781 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:50:41,781 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:50:41,781 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:50:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-10-13 17:50:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:50:41,807 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:41,808 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:41,810 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:41,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:41,815 INFO L82 PathProgramCache]: Analyzing trace with hash 163391893, now seen corresponding path program 1 times [2019-10-13 17:50:41,823 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:41,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713255866] [2019-10-13 17:50:41,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:41,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:41,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,022 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 17:50:42,023 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713255866] [2019-10-13 17:50:42,024 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:42,025 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:50:42,025 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984318146] [2019-10-13 17:50:42,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:50:42,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:42,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:50:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:50:42,047 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2019-10-13 17:50:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:42,194 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-10-13 17:50:42,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:50:42,197 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-10-13 17:50:42,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:42,209 INFO L225 Difference]: With dead ends: 42 [2019-10-13 17:50:42,210 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 17:50:42,217 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 17:50:42,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 17:50:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 17:50:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 17:50:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-10-13 17:50:42,282 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2019-10-13 17:50:42,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:42,284 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-10-13 17:50:42,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:50:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-10-13 17:50:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 17:50:42,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:42,287 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:42,287 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1009214006, now seen corresponding path program 1 times [2019-10-13 17:50:42,289 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:42,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435619324] [2019-10-13 17:50:42,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:42,290 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:42,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,442 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 17:50:42,442 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435619324] [2019-10-13 17:50:42,443 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:50:42,443 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:50:42,443 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426996415] [2019-10-13 17:50:42,445 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:50:42,446 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:42,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:50:42,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:50:42,447 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 4 states. [2019-10-13 17:50:42,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:42,531 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2019-10-13 17:50:42,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:50:42,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-13 17:50:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:42,533 INFO L225 Difference]: With dead ends: 38 [2019-10-13 17:50:42,533 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 17:50:42,534 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 17:50:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 17:50:42,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2019-10-13 17:50:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 17:50:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-13 17:50:42,542 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2019-10-13 17:50:42,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:42,542 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-13 17:50:42,543 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:50:42,543 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-13 17:50:42,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 17:50:42,544 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:42,544 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:42,544 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:42,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:42,545 INFO L82 PathProgramCache]: Analyzing trace with hash 545846646, now seen corresponding path program 1 times [2019-10-13 17:50:42,545 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:42,545 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606999806] [2019-10-13 17:50:42,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:42,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:42,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:42,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606999806] [2019-10-13 17:50:42,653 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515674893] [2019-10-13 17:50:42,653 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 17:50:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:42,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:50:42,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:42,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:50:42,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:50:42,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45285504] [2019-10-13 17:50:42,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:50:42,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:42,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:50:42,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:50:42,787 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2019-10-13 17:50:42,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:42,894 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2019-10-13 17:50:42,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:50:42,894 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-10-13 17:50:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:42,895 INFO L225 Difference]: With dead ends: 41 [2019-10-13 17:50:42,896 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 17:50:42,896 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:50:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 17:50:42,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-10-13 17:50:42,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:50:42,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-10-13 17:50:42,903 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 17 [2019-10-13 17:50:42,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:42,904 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-10-13 17:50:42,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:50:42,904 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-10-13 17:50:42,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:50:42,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:42,905 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:43,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:43,111 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:43,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:43,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1840475722, now seen corresponding path program 2 times [2019-10-13 17:50:43,112 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:43,113 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460584891] [2019-10-13 17:50:43,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:43,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:43,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:43,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:43,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460584891] [2019-10-13 17:50:43,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408340861] [2019-10-13 17:50:43,385 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 17:50:43,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:50:43,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:50:43,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:50:43,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:43,498 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 [2019-10-13 17:50:43,499 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:43,508 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:43,509 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:50:43,509 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:18 [2019-10-13 17:50:43,547 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:50:43,549 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 23 treesize of output 22 [2019-10-13 17:50:43,550 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:43,560 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:43,561 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. [2019-10-13 17:50:43,561 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:25 [2019-10-13 17:50:43,643 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-13 17:50:43,645 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:43,646 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 24 treesize of output 10 [2019-10-13 17:50:43,647 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:43,651 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:43,651 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:50:43,652 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:3 [2019-10-13 17:50:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:43,690 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:50:43,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2019-10-13 17:50:43,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837570984] [2019-10-13 17:50:43,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:50:43,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:43,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:50:43,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:50:43,692 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 15 states. [2019-10-13 17:50:45,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:45,248 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2019-10-13 17:50:45,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:50:45,248 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2019-10-13 17:50:45,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:45,251 INFO L225 Difference]: With dead ends: 47 [2019-10-13 17:50:45,251 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 17:50:45,252 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:50:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 17:50:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 32. [2019-10-13 17:50:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 17:50:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-10-13 17:50:45,266 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 20 [2019-10-13 17:50:45,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:45,267 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-10-13 17:50:45,267 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:50:45,267 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-10-13 17:50:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 17:50:45,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:45,268 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] [2019-10-13 17:50:45,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:45,473 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:45,474 INFO L82 PathProgramCache]: Analyzing trace with hash -618905122, now seen corresponding path program 1 times [2019-10-13 17:50:45,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:45,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563640482] [2019-10-13 17:50:45,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:45,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:45,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:45,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:45,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:45,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563640482] [2019-10-13 17:50:45,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765241537] [2019-10-13 17:50:45,679 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 17:50:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:45,733 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 17:50:45,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:45,760 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 [2019-10-13 17:50:45,761 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:45,768 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:45,769 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. [2019-10-13 17:50:45,769 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-10-13 17:50:47,843 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 23 treesize of output 7 [2019-10-13 17:50:47,843 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:47,850 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:47,850 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:50:47,851 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2019-10-13 17:50:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:50:47,896 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:50:47,896 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2019-10-13 17:50:47,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628402443] [2019-10-13 17:50:47,897 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:50:47,897 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:47,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:50:47,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2019-10-13 17:50:47,898 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 15 states. [2019-10-13 17:50:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:54,313 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2019-10-13 17:50:54,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:50:54,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2019-10-13 17:50:54,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:54,316 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:50:54,316 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 17:50:54,317 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=84, Invalid=376, Unknown=2, NotChecked=0, Total=462 [2019-10-13 17:50:54,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 17:50:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2019-10-13 17:50:54,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 17:50:54,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2019-10-13 17:50:54,326 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 28 [2019-10-13 17:50:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:54,327 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2019-10-13 17:50:54,327 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:50:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2019-10-13 17:50:54,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:50:54,328 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:54,329 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] [2019-10-13 17:50:54,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:54,541 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:54,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:54,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2140291442, now seen corresponding path program 2 times [2019-10-13 17:50:54,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:54,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858453212] [2019-10-13 17:50:54,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:54,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:54,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:50:54,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858453212] [2019-10-13 17:50:54,678 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878302521] [2019-10-13 17:50:54,679 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 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 17:50:54,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:50:54,716 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:50:54,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:50:54,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:54,780 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:50:54,781 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:50:54,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2019-10-13 17:50:54,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105127762] [2019-10-13 17:50:54,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:50:54,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:50:54,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:50:54,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:50:54,782 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 14 states. [2019-10-13 17:50:55,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:50:55,062 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2019-10-13 17:50:55,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:50:55,063 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2019-10-13 17:50:55,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:50:55,065 INFO L225 Difference]: With dead ends: 96 [2019-10-13 17:50:55,065 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 17:50:55,066 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:50:55,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 17:50:55,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2019-10-13 17:50:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:50:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2019-10-13 17:50:55,077 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2019-10-13 17:50:55,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:50:55,078 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2019-10-13 17:50:55,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:50:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2019-10-13 17:50:55,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 17:50:55,079 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:50:55,079 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:50:55,283 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:50:55,284 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:50:55,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:50:55,284 INFO L82 PathProgramCache]: Analyzing trace with hash -324382690, now seen corresponding path program 3 times [2019-10-13 17:50:55,285 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:50:55,285 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649655432] [2019-10-13 17:50:55,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:55,285 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:50:55,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:50:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:55,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:55,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:50:55,477 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:50:55,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649655432] [2019-10-13 17:50:55,477 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706171290] [2019-10-13 17:50:55,478 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 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 17:50:55,539 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:50:55,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:50:55,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:50:55,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:50:55,554 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 [2019-10-13 17:50:55,555 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:50:55,561 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:50:55,562 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. [2019-10-13 17:50:55,562 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18 [2019-10-13 17:51:03,691 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 23 treesize of output 7 [2019-10-13 17:51:03,691 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,700 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:03,701 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:03,701 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:29, output treesize:3 [2019-10-13 17:51:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:51:03,744 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:51:03,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 18 [2019-10-13 17:51:03,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645592147] [2019-10-13 17:51:03,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:51:03,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:03,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:51:03,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=257, Unknown=2, NotChecked=0, Total=306 [2019-10-13 17:51:03,746 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 18 states. [2019-10-13 17:51:11,857 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-13 17:51:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:12,292 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2019-10-13 17:51:12,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:51:12,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-10-13 17:51:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:12,294 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:51:12,294 INFO L226 Difference]: Without dead ends: 55 [2019-10-13 17:51:12,294 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=105, Invalid=594, Unknown=3, NotChecked=0, Total=702 [2019-10-13 17:51:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-10-13 17:51:12,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2019-10-13 17:51:12,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:51:12,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2019-10-13 17:51:12,302 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 39 [2019-10-13 17:51:12,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:12,303 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2019-10-13 17:51:12,305 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:51:12,306 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2019-10-13 17:51:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 17:51:12,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:12,307 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:12,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:12,509 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:12,510 INFO L82 PathProgramCache]: Analyzing trace with hash -229765198, now seen corresponding path program 4 times [2019-10-13 17:51:12,510 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:12,510 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541513985] [2019-10-13 17:51:12,510 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:12,511 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:12,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:12,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:51:12,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541513985] [2019-10-13 17:51:12,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694208251] [2019-10-13 17:51:12,659 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 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 17:51:12,720 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:51:12,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:12,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:51:12,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:12,849 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:51:12,849 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:51:12,850 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2019-10-13 17:51:12,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271018122] [2019-10-13 17:51:12,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:51:12,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:12,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:51:12,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:51:12,852 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 17 states. [2019-10-13 17:51:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:13,146 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2019-10-13 17:51:13,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:51:13,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 47 [2019-10-13 17:51:13,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:13,147 INFO L225 Difference]: With dead ends: 123 [2019-10-13 17:51:13,148 INFO L226 Difference]: Without dead ends: 61 [2019-10-13 17:51:13,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:51:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-10-13 17:51:13,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2019-10-13 17:51:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-10-13 17:51:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-10-13 17:51:13,169 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 47 [2019-10-13 17:51:13,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:13,170 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-10-13 17:51:13,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:51:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-10-13 17:51:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:51:13,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:13,174 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:13,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:13,379 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash -929276538, now seen corresponding path program 5 times [2019-10-13 17:51:13,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:13,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292605876] [2019-10-13 17:51:13,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:13,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:13,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:13,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:51:13,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292605876] [2019-10-13 17:51:13,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099507914] [2019-10-13 17:51:13,666 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 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 17:51:13,724 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-10-13 17:51:13,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:13,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 17:51:13,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:13,850 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 [2019-10-13 17:51:13,851 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:13,857 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:13,858 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:13,858 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:13 [2019-10-13 17:51:14,242 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 15 treesize of output 7 [2019-10-13 17:51:14,242 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:14,245 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:14,246 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:51:14,246 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:51:14,303 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:51:14,304 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:51:14,304 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2019-10-13 17:51:14,304 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265835954] [2019-10-13 17:51:14,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:51:14,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:14,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:51:14,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:51:14,311 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 28 states. [2019-10-13 17:51:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:15,081 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2019-10-13 17:51:15,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:51:15,082 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2019-10-13 17:51:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:15,083 INFO L225 Difference]: With dead ends: 68 [2019-10-13 17:51:15,084 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:51:15,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:51:15,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:51:15,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2019-10-13 17:51:15,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-10-13 17:51:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-10-13 17:51:15,101 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 50 [2019-10-13 17:51:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:15,101 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-10-13 17:51:15,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:51:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-10-13 17:51:15,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:51:15,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:15,107 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:15,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:15,316 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:15,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:15,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1907373338, now seen corresponding path program 6 times [2019-10-13 17:51:15,316 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:15,316 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410779508] [2019-10-13 17:51:15,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:15,316 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:15,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:15,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:15,456 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 27 proven. 35 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:51:15,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410779508] [2019-10-13 17:51:15,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736303832] [2019-10-13 17:51:15,457 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 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 17:51:15,512 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-13 17:51:15,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:51:15,513 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:51:15,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 40 proven. 22 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:51:15,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:51:15,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 20 [2019-10-13 17:51:15,618 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779812120] [2019-10-13 17:51:15,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:51:15,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:51:15,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:51:15,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:51:15,619 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 20 states. [2019-10-13 17:51:15,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:51:15,978 INFO L93 Difference]: Finished difference Result 150 states and 157 transitions. [2019-10-13 17:51:15,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:51:15,978 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 58 [2019-10-13 17:51:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:51:15,980 INFO L225 Difference]: With dead ends: 150 [2019-10-13 17:51:15,980 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 17:51:15,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:51:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 17:51:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 65. [2019-10-13 17:51:15,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:51:15,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-10-13 17:51:15,991 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2019-10-13 17:51:15,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:51:15,991 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-10-13 17:51:15,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:51:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-10-13 17:51:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 17:51:15,992 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:51:15,993 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:51:16,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:51:16,203 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:51:16,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:51:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash 209500870, now seen corresponding path program 7 times [2019-10-13 17:51:16,203 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:51:16,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059433439] [2019-10-13 17:51:16,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:16,204 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:51:16,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:51:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:16,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 8 proven. 67 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 17:51:16,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059433439] [2019-10-13 17:51:16,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561556339] [2019-10-13 17:51:16,504 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 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 17:51:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:51:16,548 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 17:51:16,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:51:16,570 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 [2019-10-13 17:51:16,570 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:51:16,574 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:51:16,575 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. [2019-10-13 17:51:16,576 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:22, output treesize:18