/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 11:49:50,384 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 11:49:50,385 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 11:49:50,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 11:49:50,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 11:49:50,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 11:49:50,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 11:49:50,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 11:49:50,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 11:49:50,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 11:49:50,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 11:49:50,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 11:49:50,440 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 11:49:50,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 11:49:50,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 11:49:50,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 11:49:50,447 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 11:49:50,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 11:49:50,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 11:49:50,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 11:49:50,457 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 [2021-05-02 11:49:50,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 11:49:50,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 11:49:50,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 11:49:50,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 11:49:50,475 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 11:49:50,475 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 11:49:50,475 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 11:49:50,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 11:49:50,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 11:49:50,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 11:49:50,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 11:49:50,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 11:49:50,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 11:49:50,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 11:49:50,477 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 11:49:50,477 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 11:49:50,477 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 11:49:50,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 11:49:50,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 11:49:50,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 11:49:50,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 11:49:50,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 11:49:50,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 11:49:50,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 11:49:50,754 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 11:49:50,755 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 11:49:50,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-1.c [2021-05-02 11:49:50,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a12f9257/3da058d6ac7746cf81fa04abd11999dd/FLAG73f1e8904 [2021-05-02 11:49:51,160 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 11:49:51,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c [2021-05-02 11:49:51,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a12f9257/3da058d6ac7746cf81fa04abd11999dd/FLAG73f1e8904 [2021-05-02 11:49:51,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a12f9257/3da058d6ac7746cf81fa04abd11999dd [2021-05-02 11:49:51,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 11:49:51,604 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 11:49:51,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 11:49:51,605 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 11:49:51,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 11:49:51,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f5002f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51, skipping insertion in model container [2021-05-02 11:49:51,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 11:49:51,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 11:49:51,737 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2021-05-02 11:49:51,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:49:51,755 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 11:49:51,767 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-1.c[328,341] [2021-05-02 11:49:51,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:49:51,798 INFO L208 MainTranslator]: Completed translation [2021-05-02 11:49:51,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51 WrapperNode [2021-05-02 11:49:51,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 11:49:51,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 11:49:51,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 11:49:51,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 11:49:51,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,832 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,841 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (1/1) ... [2021-05-02 11:49:51,842 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 11:49:51,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 11:49:51,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 11:49:51,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 11:49:51,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (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 [2021-05-02 11:49:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 11:49:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 11:49:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 11:49:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 11:49:51,923 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 11:49:51,923 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 11:49:51,924 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 11:49:51,924 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 11:49:51,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 11:49:51,924 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 11:49:51,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 11:49:51,925 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 11:49:51,925 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 11:49:51,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 11:49:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 11:49:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 11:49:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 11:49:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 11:49:51,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 11:49:52,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 11:49:52,202 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 11:49:52,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:49:52 BoogieIcfgContainer [2021-05-02 11:49:52,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 11:49:52,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 11:49:52,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 11:49:52,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 11:49:52,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:49:51" (1/3) ... [2021-05-02 11:49:52,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d403c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:49:52, skipping insertion in model container [2021-05-02 11:49:52,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:49:51" (2/3) ... [2021-05-02 11:49:52,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d403c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:49:52, skipping insertion in model container [2021-05-02 11:49:52,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:49:52" (3/3) ... [2021-05-02 11:49:52,208 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-1.c [2021-05-02 11:49:52,211 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 11:49:52,214 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 11:49:52,226 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 11:49:52,241 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 11:49:52,241 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 11:49:52,241 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 11:49:52,241 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 11:49:52,241 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 11:49:52,241 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 11:49:52,241 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 11:49:52,241 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 11:49:52,251 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:49:52,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 11:49:52,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:52,255 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:52,255 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:52,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:52,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1898607287, now seen corresponding path program 1 times [2021-05-02 11:49:52,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:52,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757228398] [2021-05-02 11:49:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:52,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:52,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757228398] [2021-05-02 11:49:52,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757228398] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:49:52,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:49:52,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 11:49:52,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388143809] [2021-05-02 11:49:52,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 11:49:52,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:52,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 11:49:52,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 11:49:52,529 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:52,665 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2021-05-02 11:49:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 11:49:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 11:49:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:52,671 INFO L225 Difference]: With dead ends: 67 [2021-05-02 11:49:52,671 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 11:49:52,673 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 11:49:52,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 11:49:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 11:49:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 11:49:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-05-02 11:49:52,701 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 15 [2021-05-02 11:49:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:52,701 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-05-02 11:49:52,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-05-02 11:49:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 11:49:52,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:52,702 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:52,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 11:49:52,703 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:52,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1409532089, now seen corresponding path program 1 times [2021-05-02 11:49:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190268388] [2021-05-02 11:49:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:52,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:52,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190268388] [2021-05-02 11:49:52,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190268388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:52,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446585862] [2021-05-02 11:49:52,998 INFO L95 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 [2021-05-02 11:49:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:53,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 11:49:53,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:49:53,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:53,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446585862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:53,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:49:53,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-05-02 11:49:53,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172403587] [2021-05-02 11:49:53,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 11:49:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 11:49:53,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 11:49:53,193 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:53,382 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2021-05-02 11:49:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 11:49:53,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 11:49:53,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:53,384 INFO L225 Difference]: With dead ends: 65 [2021-05-02 11:49:53,384 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 11:49:53,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-02 11:49:53,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 11:49:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-05-02 11:49:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 11:49:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-05-02 11:49:53,394 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 17 [2021-05-02 11:49:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:53,395 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-05-02 11:49:53,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-05-02 11:49:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 11:49:53,399 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:53,399 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:53,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 11:49:53,607 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:53,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:53,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1068097608, now seen corresponding path program 1 times [2021-05-02 11:49:53,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:53,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716313186] [2021-05-02 11:49:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:54,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:54,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:54,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716313186] [2021-05-02 11:49:54,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716313186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:54,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100408960] [2021-05-02 11:49:54,052 INFO L95 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 [2021-05-02 11:49:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:54,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 11:49:54,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:49:54,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:49:54,282 INFO L388 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 28 treesize of output 27 [2021-05-02 11:49:54,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:54,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:54,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:49:54,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2021-05-02 11:49:54,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,364 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:54,364 INFO L388 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 26 treesize of output 10 [2021-05-02 11:49:54,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:54,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:54,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:49:54,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:49:54,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 11:49:54,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100408960] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:54,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:49:54,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 22 [2021-05-02 11:49:54,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620664953] [2021-05-02 11:49:54,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 11:49:54,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:54,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 11:49:54,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-05-02 11:49:54,414 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:55,061 INFO L93 Difference]: Finished difference Result 89 states and 113 transitions. [2021-05-02 11:49:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 11:49:55,061 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 11:49:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:55,063 INFO L225 Difference]: With dead ends: 89 [2021-05-02 11:49:55,063 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 11:49:55,064 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 714.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 11:49:55,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 11:49:55,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-05-02 11:49:55,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 43 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:49:55,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2021-05-02 11:49:55,071 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2021-05-02 11:49:55,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:55,071 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2021-05-02 11:49:55,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 19 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:55,071 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2021-05-02 11:49:55,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 11:49:55,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:55,072 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:55,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:49:55,285 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1586594931, now seen corresponding path program 1 times [2021-05-02 11:49:55,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:55,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664902235] [2021-05-02 11:49:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:55,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:55,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:55,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:55,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:55,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664902235] [2021-05-02 11:49:55,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664902235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:55,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054692231] [2021-05-02 11:49:55,660 INFO L95 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 [2021-05-02 11:49:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:55,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 11:49:55,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:49:55,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,872 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 11:49:55,873 INFO L388 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 36 treesize of output 27 [2021-05-02 11:49:55,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:55,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:55,880 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:49:55,880 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:38 [2021-05-02 11:49:55,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:55,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,127 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-05-02 11:49:56,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 31 [2021-05-02 11:49:56,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:56,141 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.3 percent of original size [2021-05-02 11:49:56,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 11:49:56,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:33 [2021-05-02 11:49:56,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,289 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-05-02 11:49:56,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-05-02 11:49:56,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:56,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:56,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:49:56,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2021-05-02 11:49:56,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 11:49:56,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054692231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:56,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:49:56,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2021-05-02 11:49:56,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680157342] [2021-05-02 11:49:56,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 11:49:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 11:49:56,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-05-02 11:49:56,348 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:57,454 INFO L93 Difference]: Finished difference Result 138 states and 171 transitions. [2021-05-02 11:49:57,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 11:49:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 11:49:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:57,457 INFO L225 Difference]: With dead ends: 138 [2021-05-02 11:49:57,457 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 11:49:57,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1187.6ms TimeCoverageRelationStatistics Valid=375, Invalid=2487, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 11:49:57,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 11:49:57,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 55. [2021-05-02 11:49:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 48 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:49:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2021-05-02 11:49:57,466 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2021-05-02 11:49:57,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:57,466 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2021-05-02 11:49:57,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:57,466 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2021-05-02 11:49:57,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 11:49:57,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:57,467 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:57,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:49:57,681 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash 932991851, now seen corresponding path program 2 times [2021-05-02 11:49:57,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:57,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145203859] [2021-05-02 11:49:57,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:57,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:57,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:57,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145203859] [2021-05-02 11:49:57,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145203859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:57,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2297817] [2021-05-02 11:49:57,823 INFO L93 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 [2021-05-02 11:49:57,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 11:49:57,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:49:57,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 11:49:57,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:49:57,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:57,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:49:57,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2297817] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:57,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:49:57,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 11:49:57,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721046833] [2021-05-02 11:49:57,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 11:49:57,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:57,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 11:49:57,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 11:49:57,955 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:58,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:58,073 INFO L93 Difference]: Finished difference Result 147 states and 177 transitions. [2021-05-02 11:49:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 11:49:58,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 11:49:58,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:58,075 INFO L225 Difference]: With dead ends: 147 [2021-05-02 11:49:58,076 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 11:49:58,076 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 11:49:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 11:49:58,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2021-05-02 11:49:58,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 63 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:49:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 81 transitions. [2021-05-02 11:49:58,083 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 81 transitions. Word has length 31 [2021-05-02 11:49:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:58,083 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 81 transitions. [2021-05-02 11:49:58,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:49:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 81 transitions. [2021-05-02 11:49:58,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 11:49:58,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:58,084 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:58,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:49:58,301 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:58,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:58,302 INFO L82 PathProgramCache]: Analyzing trace with hash 912710034, now seen corresponding path program 1 times [2021-05-02 11:49:58,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:58,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603998644] [2021-05-02 11:49:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:58,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:58,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:58,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 11:49:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:58,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:49:58,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:58,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603998644] [2021-05-02 11:49:58,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603998644] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:58,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026557404] [2021-05-02 11:49:58,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:49:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:58,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 11:49:58,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:49:58,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:58,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:58,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:58,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:49:58,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026557404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:58,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:49:58,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-02 11:49:58,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263068199] [2021-05-02 11:49:58,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 11:49:58,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:58,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 11:49:58,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 11:49:58,572 INFO L87 Difference]: Start difference. First operand 70 states and 81 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 11:49:58,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:49:58,720 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2021-05-02 11:49:58,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 11:49:58,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-05-02 11:49:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:49:58,721 INFO L225 Difference]: With dead ends: 116 [2021-05-02 11:49:58,721 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 11:49:58,721 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-02 11:49:58,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 11:49:58,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 66. [2021-05-02 11:49:58,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 59 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:49:58,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-05-02 11:49:58,727 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 33 [2021-05-02 11:49:58,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:49:58,727 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-05-02 11:49:58,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 11:49:58,727 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-05-02 11:49:58,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 11:49:58,728 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:49:58,728 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:49:58,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:49:58,945 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:49:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:49:58,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1010087575, now seen corresponding path program 3 times [2021-05-02 11:49:58,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:49:58,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491893317] [2021-05-02 11:49:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:49:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:59,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:49:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:49:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:49:59,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:49:59,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491893317] [2021-05-02 11:49:59,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491893317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:59,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155661862] [2021-05-02 11:49:59,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-05-02 11:49:59,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 11:49:59,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:49:59,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 11:49:59,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:49:59,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-05-02 11:49:59,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:59,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:59,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:49:59,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2021-05-02 11:49:59,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:49:59,474 INFO L388 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 28 treesize of output 27 [2021-05-02 11:49:59,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:59,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:59,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:49:59,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2021-05-02 11:49:59,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:49:59,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:49:59,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:49:59,564 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:59,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 11:49:59,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:59,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:59,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:49:59,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2021-05-02 11:49:59,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:59,593 INFO L388 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 26 treesize of output 10 [2021-05-02 11:49:59,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:49:59,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:49:59,596 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:49:59,596 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:49:59,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:49:59,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 11:49:59,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155661862] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:49:59,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:49:59,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 23 [2021-05-02 11:49:59,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680203175] [2021-05-02 11:49:59,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 11:49:59,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:49:59,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 11:49:59,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-05-02 11:49:59,627 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:00,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:00,088 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2021-05-02 11:50:00,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 11:50:00,088 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 11:50:00,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:00,089 INFO L225 Difference]: With dead ends: 137 [2021-05-02 11:50:00,089 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 11:50:00,090 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 509.4ms TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 11:50:00,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 11:50:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 75. [2021-05-02 11:50:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 68 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:50:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2021-05-02 11:50:00,095 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 33 [2021-05-02 11:50:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:00,096 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2021-05-02 11:50:00,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2021-05-02 11:50:00,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 11:50:00,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:00,097 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:00,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:00,297 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:00,298 INFO L82 PathProgramCache]: Analyzing trace with hash 925785056, now seen corresponding path program 1 times [2021-05-02 11:50:00,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:00,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109144148] [2021-05-02 11:50:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:00,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:00,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:50:00,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:00,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109144148] [2021-05-02 11:50:00,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109144148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:00,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459401577] [2021-05-02 11:50:00,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 11:50:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:00,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:00,779 INFO L388 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 21 treesize of output 20 [2021-05-02 11:50:00,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:00,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:00,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:00,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-05-02 11:50:00,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,815 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:00,816 INFO L388 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 26 treesize of output 10 [2021-05-02 11:50:00,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:00,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:00,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:00,819 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:50:00,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 11:50:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459401577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:00,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:50:00,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 23 [2021-05-02 11:50:00,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184233214] [2021-05-02 11:50:00,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 11:50:00,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 11:50:00,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-02 11:50:00,851 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:02,044 INFO L93 Difference]: Finished difference Result 241 states and 302 transitions. [2021-05-02 11:50:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 11:50:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 11:50:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:02,047 INFO L225 Difference]: With dead ends: 241 [2021-05-02 11:50:02,047 INFO L226 Difference]: Without dead ends: 201 [2021-05-02 11:50:02,053 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 967.8ms TimeCoverageRelationStatistics Valid=605, Invalid=3177, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 11:50:02,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-02 11:50:02,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 91. [2021-05-02 11:50:02,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.216867469879518) internal successors, (101), 84 states have internal predecessors, (101), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:50:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2021-05-02 11:50:02,074 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 38 [2021-05-02 11:50:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:02,075 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2021-05-02 11:50:02,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:02,076 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2021-05-02 11:50:02,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 11:50:02,082 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:02,082 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:02,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:02,297 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash 909842600, now seen corresponding path program 2 times [2021-05-02 11:50:02,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:02,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785388963] [2021-05-02 11:50:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:02,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:50:02,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:02,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785388963] [2021-05-02 11:50:02,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785388963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:02,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376293408] [2021-05-02 11:50:02,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:02,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 11:50:02,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:50:02,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 11:50:02,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:02,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,900 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 11:50:02,900 INFO L388 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 36 treesize of output 27 [2021-05-02 11:50:02,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:02,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:02,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:02,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:44 [2021-05-02 11:50:02,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:02,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,102 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-05-02 11:50:03,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2021-05-02 11:50:03,104 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:03,120 INFO L628 ElimStorePlain]: treesize reduction 5, result has 88.6 percent of original size [2021-05-02 11:50:03,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 11:50:03,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2021-05-02 11:50:03,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,331 INFO L354 Elim1Store]: treesize reduction 88, result has 22.1 percent of original size [2021-05-02 11:50:03,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-05-02 11:50:03,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:03,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:03,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 11:50:03,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:33 [2021-05-02 11:50:03,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,484 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-05-02 11:50:03,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-05-02 11:50:03,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:03,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:03,492 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:03,492 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2021-05-02 11:50:03,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 11:50:03,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376293408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:03,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:50:03,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 38 [2021-05-02 11:50:03,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439265712] [2021-05-02 11:50:03,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 11:50:03,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:03,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 11:50:03,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1244, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 11:50:03,544 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:04,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:04,480 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2021-05-02 11:50:04,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 11:50:04,480 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 11:50:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:04,481 INFO L225 Difference]: With dead ends: 124 [2021-05-02 11:50:04,481 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 11:50:04,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1045.6ms TimeCoverageRelationStatistics Valid=290, Invalid=2160, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 11:50:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 11:50:04,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2021-05-02 11:50:04,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.2195121951219512) internal successors, (100), 83 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:50:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2021-05-02 11:50:04,486 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 38 [2021-05-02 11:50:04,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:04,487 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2021-05-02 11:50:04,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:04,487 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2021-05-02 11:50:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 11:50:04,487 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:04,487 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:04,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 11:50:04,694 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:04,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:04,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1844691523, now seen corresponding path program 2 times [2021-05-02 11:50:04,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:04,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444421859] [2021-05-02 11:50:04,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:04,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:04,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 11:50:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:50:04,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:04,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444421859] [2021-05-02 11:50:04,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444421859] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:04,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201745641] [2021-05-02 11:50:04,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-05-02 11:50:04,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 11:50:04,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:50:05,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 11:50:05,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:05,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,095 INFO L388 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 16 treesize of output 12 [2021-05-02 11:50:05,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:05,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:05,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:05,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-05-02 11:50:05,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,138 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-05-02 11:50:05,138 INFO L388 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 23 treesize of output 22 [2021-05-02 11:50:05,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:05,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:05,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:05,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-05-02 11:50:05,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:05,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:07,165 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 8))))) is different from true [2021-05-02 11:50:07,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:07,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:07,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:07,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:07,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:09,211 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 11:50:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:09,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:09,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:09,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:09,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,252 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2021-05-02 11:50:13,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,305 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 11:50:13,305 INFO L388 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 10 [2021-05-02 11:50:13,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:13,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:13,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:13,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-05-02 11:50:13,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:13,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:15,354 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2021-05-02 11:50:15,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201745641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:15,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:50:15,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 24 [2021-05-02 11:50:15,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820671421] [2021-05-02 11:50:15,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 11:50:15,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:15,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 11:50:15,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=448, Unknown=3, NotChecked=42, Total=552 [2021-05-02 11:50:15,356 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:50:19,778 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 11:50:21,831 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 11:50:25,894 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-02 11:50:34,057 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-02 11:50:38,119 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-02 11:50:38,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:38,196 INFO L93 Difference]: Finished difference Result 156 states and 187 transitions. [2021-05-02 11:50:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 11:50:38,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-05-02 11:50:38,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:38,197 INFO L225 Difference]: With dead ends: 156 [2021-05-02 11:50:38,198 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 11:50:38,198 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 30715.6ms TimeCoverageRelationStatistics Valid=194, Invalid=1445, Unknown=5, NotChecked=78, Total=1722 [2021-05-02 11:50:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 11:50:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2021-05-02 11:50:38,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 96 states have (on average 1.2083333333333333) internal successors, (116), 97 states have internal predecessors, (116), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:50:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2021-05-02 11:50:38,205 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 41 [2021-05-02 11:50:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:38,205 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2021-05-02 11:50:38,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 20 states have internal predecessors, (51), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:50:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2021-05-02 11:50:38,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 11:50:38,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:38,206 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:38,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 11:50:38,406 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:38,407 INFO L82 PathProgramCache]: Analyzing trace with hash 364945739, now seen corresponding path program 3 times [2021-05-02 11:50:38,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:38,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234777098] [2021-05-02 11:50:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:38,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:50:38,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:38,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234777098] [2021-05-02 11:50:38,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234777098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:38,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935173868] [2021-05-02 11:50:38,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:38,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 11:50:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:50:38,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 11:50:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:38,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:38,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:38,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:38,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:38,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,004 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 11:50:39,005 INFO L388 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 36 treesize of output 27 [2021-05-02 11:50:39,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:39,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:39,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:39,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:36 [2021-05-02 11:50:39,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,129 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-05-02 11:50:39,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 31 [2021-05-02 11:50:39,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:39,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:39,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:50:39,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2021-05-02 11:50:39,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,238 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-05-02 11:50:39,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-05-02 11:50:39,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:39,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:39,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:39,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:3 [2021-05-02 11:50:39,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 11:50:39,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935173868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:39,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:50:39,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 32 [2021-05-02 11:50:39,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073182642] [2021-05-02 11:50:39,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 11:50:39,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:39,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 11:50:39,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2021-05-02 11:50:39,301 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:41,506 INFO L93 Difference]: Finished difference Result 234 states and 285 transitions. [2021-05-02 11:50:41,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 11:50:41,507 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 11:50:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:41,508 INFO L225 Difference]: With dead ends: 234 [2021-05-02 11:50:41,508 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 11:50:41,509 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2396 ImplicationChecksByTransitivity, 1987.3ms TimeCoverageRelationStatistics Valid=873, Invalid=6783, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 11:50:41,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 11:50:41,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 104. [2021-05-02 11:50:41,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 94 states have (on average 1.202127659574468) internal successors, (113), 95 states have internal predecessors, (113), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:50:41,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2021-05-02 11:50:41,517 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 43 [2021-05-02 11:50:41,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:41,517 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2021-05-02 11:50:41,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:41,517 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2021-05-02 11:50:41,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 11:50:41,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:41,517 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:41,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 11:50:41,735 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:41,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:41,735 INFO L82 PathProgramCache]: Analyzing trace with hash -866950133, now seen corresponding path program 1 times [2021-05-02 11:50:41,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:41,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609787370] [2021-05-02 11:50:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:41,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:41,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:41,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 11:50:41,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609787370] [2021-05-02 11:50:41,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609787370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:41,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103707067] [2021-05-02 11:50:41,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 11:50:41,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:41,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:41,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,056 INFO L388 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 28 treesize of output 27 [2021-05-02 11:50:42,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:42,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:42,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:50:42,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2021-05-02 11:50:42,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:42,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-05-02 11:50:42,199 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:42,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:42,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:50:42,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:30 [2021-05-02 11:50:42,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:42,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-05-02 11:50:42,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:42,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:42,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:50:42,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:49, output treesize:30 [2021-05-02 11:50:42,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:50:42,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:50:42,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:50:42,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:42,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-05-02 11:50:42,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:42,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:42,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:42,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:3 [2021-05-02 11:50:42,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 11:50:42,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103707067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:42,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:50:42,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 26 [2021-05-02 11:50:42,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027988544] [2021-05-02 11:50:42,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 11:50:42,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:42,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 11:50:42,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-05-02 11:50:42,517 INFO L87 Difference]: Start difference. First operand 104 states and 122 transitions. Second operand has 26 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:44,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:50:44,107 INFO L93 Difference]: Finished difference Result 347 states and 424 transitions. [2021-05-02 11:50:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 11:50:44,107 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 11:50:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:50:44,109 INFO L225 Difference]: With dead ends: 347 [2021-05-02 11:50:44,109 INFO L226 Difference]: Without dead ends: 298 [2021-05-02 11:50:44,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1392.3ms TimeCoverageRelationStatistics Valid=428, Invalid=2994, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 11:50:44,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-05-02 11:50:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 157. [2021-05-02 11:50:44,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 147 states have (on average 1.2040816326530612) internal successors, (177), 148 states have internal predecessors, (177), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:50:44,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2021-05-02 11:50:44,119 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 44 [2021-05-02 11:50:44,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:50:44,119 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2021-05-02 11:50:44,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.68) internal successors, (67), 24 states have internal predecessors, (67), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:50:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2021-05-02 11:50:44,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 11:50:44,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:50:44,120 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:50:44,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:44,325 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:50:44,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:50:44,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1980469830, now seen corresponding path program 1 times [2021-05-02 11:50:44,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:50:44,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485681898] [2021-05-02 11:50:44,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:50:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:44,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:50:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:44,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-05-02 11:50:44,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:50:44,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:50:44,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485681898] [2021-05-02 11:50:44,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485681898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:44,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685670184] [2021-05-02 11:50:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:50:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:50:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 11:50:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:50:44,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,672 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 11:50:44,672 INFO L388 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 38 treesize of output 29 [2021-05-02 11:50:44,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:44,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:44,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:44,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:43, output treesize:39 [2021-05-02 11:50:44,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,806 INFO L354 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2021-05-02 11:50:44,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2021-05-02 11:50:44,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:44,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:44,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,815 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:50:44,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:27 [2021-05-02 11:50:44,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:44,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:52,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:53,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:53,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:53,021 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 11:50:53,021 INFO L388 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 36 treesize of output 12 [2021-05-02 11:50:53,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:50:53,024 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:50:53,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:50:53,025 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-05-02 11:50:53,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:53,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:50:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 11:50:53,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685670184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:50:53,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:50:53,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 27 [2021-05-02 11:50:53,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372055938] [2021-05-02 11:50:53,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 11:50:53,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:50:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 11:50:53,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=628, Unknown=1, NotChecked=0, Total=702 [2021-05-02 11:50:53,082 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:51:48,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:51:48,021 INFO L93 Difference]: Finished difference Result 208 states and 246 transitions. [2021-05-02 11:51:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 11:51:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2021-05-02 11:51:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:51:48,023 INFO L225 Difference]: With dead ends: 208 [2021-05-02 11:51:48,023 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 11:51:48,024 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 16855.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1865, Unknown=5, NotChecked=0, Total=2070 [2021-05-02 11:51:48,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 11:51:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 158. [2021-05-02 11:51:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 148 states have (on average 1.2094594594594594) internal successors, (179), 149 states have internal predecessors, (179), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:51:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 188 transitions. [2021-05-02 11:51:48,034 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 188 transitions. Word has length 46 [2021-05-02 11:51:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:51:48,034 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 188 transitions. [2021-05-02 11:51:48,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 23 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:51:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 188 transitions. [2021-05-02 11:51:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 11:51:48,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:51:48,035 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:51:48,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:51:48,236 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:51:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:51:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash -253360043, now seen corresponding path program 2 times [2021-05-02 11:51:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:51:48,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256100557] [2021-05-02 11:51:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:51:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:48,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:51:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 40 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 11:51:48,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:51:48,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256100557] [2021-05-02 11:51:48,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256100557] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:51:48,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265689506] [2021-05-02 11:51:48,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:51:48,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 11:51:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:51:48,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 11:51:48,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:51:48,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:48,864 INFO L388 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 28 treesize of output 27 [2021-05-02 11:51:48,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:48,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:48,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:51:48,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:35 [2021-05-02 11:51:48,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:48,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:49,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:49,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:49,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:49,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:49,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 11:51:49,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:49,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:49,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:49,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:17 [2021-05-02 11:51:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:49,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:49,038 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:49,039 INFO L388 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 26 treesize of output 10 [2021-05-02 11:51:49,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:49,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:49,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:49,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:51:49,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:49,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 11:51:49,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265689506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:51:49,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:51:49,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 30 [2021-05-02 11:51:49,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685178388] [2021-05-02 11:51:49,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 11:51:49,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:51:49,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 11:51:49,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-05-02 11:51:49,078 INFO L87 Difference]: Start difference. First operand 158 states and 188 transitions. Second operand has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:51:50,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:51:50,585 INFO L93 Difference]: Finished difference Result 321 states and 390 transitions. [2021-05-02 11:51:50,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 11:51:50,585 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 11:51:50,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:51:50,587 INFO L225 Difference]: With dead ends: 321 [2021-05-02 11:51:50,587 INFO L226 Difference]: Without dead ends: 278 [2021-05-02 11:51:50,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1194.8ms TimeCoverageRelationStatistics Valid=444, Invalid=2636, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 11:51:50,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-02 11:51:50,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 179. [2021-05-02 11:51:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 169 states have (on average 1.242603550295858) internal successors, (210), 170 states have internal predecessors, (210), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:51:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 219 transitions. [2021-05-02 11:51:50,599 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 219 transitions. Word has length 46 [2021-05-02 11:51:50,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:51:50,600 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 219 transitions. [2021-05-02 11:51:50,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 27 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:51:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 219 transitions. [2021-05-02 11:51:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 11:51:50,600 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:51:50,600 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:51:50,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 11:51:50,811 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:51:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:51:50,812 INFO L82 PathProgramCache]: Analyzing trace with hash -564916451, now seen corresponding path program 4 times [2021-05-02 11:51:50,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:51:50,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16226017] [2021-05-02 11:51:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:51:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:51,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:51:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 11:51:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:51:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16226017] [2021-05-02 11:51:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16226017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:51:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608495432] [2021-05-02 11:51:51,403 INFO L93 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:51:51,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 11:51:51,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:51:51,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 11:51:51,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:51:51,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:51,590 INFO L388 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 36 treesize of output 27 [2021-05-02 11:51:51,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:51,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:51,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:51,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2021-05-02 11:51:51,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:51:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:51,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 48 treesize of output 42 [2021-05-02 11:51:51,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:51,891 INFO L628 ElimStorePlain]: treesize reduction 12, result has 78.6 percent of original size [2021-05-02 11:51:51,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:51:51,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:36 [2021-05-02 11:51:51,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:51,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:51,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:51,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-05-02 11:51:51,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:51,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:51,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:51,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-05-02 11:51:52,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:52,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:52,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:52,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:52,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-05-02 11:51:52,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:52,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:52,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:52,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:19 [2021-05-02 11:51:52,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:52,149 INFO L388 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 12 [2021-05-02 11:51:52,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:52,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:52,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:52,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-05-02 11:51:52,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 11:51:52,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608495432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:51:52,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:51:52,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 36 [2021-05-02 11:51:52,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187451587] [2021-05-02 11:51:52,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 11:51:52,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:51:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 11:51:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 11:51:52,212 INFO L87 Difference]: Start difference. First operand 179 states and 219 transitions. Second operand has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:51:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:51:53,486 INFO L93 Difference]: Finished difference Result 329 states and 406 transitions. [2021-05-02 11:51:53,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 11:51:53,487 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 11:51:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:51:53,488 INFO L225 Difference]: With dead ends: 329 [2021-05-02 11:51:53,488 INFO L226 Difference]: Without dead ends: 251 [2021-05-02 11:51:53,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 1455.6ms TimeCoverageRelationStatistics Valid=354, Invalid=2616, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 11:51:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-02 11:51:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 185. [2021-05-02 11:51:53,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 175 states have (on average 1.2571428571428571) internal successors, (220), 176 states have internal predecessors, (220), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:51:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 229 transitions. [2021-05-02 11:51:53,501 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 229 transitions. Word has length 46 [2021-05-02 11:51:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:51:53,501 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 229 transitions. [2021-05-02 11:51:53,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 1.8571428571428572) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:51:53,502 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 229 transitions. [2021-05-02 11:51:53,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 11:51:53,502 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:51:53,502 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:51:53,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:51:53,717 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:51:53,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:51:53,717 INFO L82 PathProgramCache]: Analyzing trace with hash -966082275, now seen corresponding path program 3 times [2021-05-02 11:51:53,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:51:53,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744539378] [2021-05-02 11:51:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:51:53,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:53,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:51:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:53,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 11:51:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:53,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 11:51:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 11:51:53,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:51:53,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744539378] [2021-05-02 11:51:53,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744539378] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:51:53,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475776240] [2021-05-02 11:51:53,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:51:54,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 11:51:54,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:51:54,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 11:51:54,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:51:54,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:54,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:54,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:54,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:54,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:54,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 11:51:54,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475776240] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:51:54,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:51:54,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-05-02 11:51:54,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886457751] [2021-05-02 11:51:54,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 11:51:54,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:51:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 11:51:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 11:51:54,147 INFO L87 Difference]: Start difference. First operand 185 states and 229 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:51:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:51:54,449 INFO L93 Difference]: Finished difference Result 278 states and 350 transitions. [2021-05-02 11:51:54,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 11:51:54,450 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-05-02 11:51:54,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:51:54,451 INFO L225 Difference]: With dead ends: 278 [2021-05-02 11:51:54,451 INFO L226 Difference]: Without dead ends: 251 [2021-05-02 11:51:54,452 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 198.3ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-02 11:51:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-02 11:51:54,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 188. [2021-05-02 11:51:54,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 178 states have (on average 1.2303370786516854) internal successors, (219), 180 states have internal predecessors, (219), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:51:54,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 229 transitions. [2021-05-02 11:51:54,467 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 229 transitions. Word has length 49 [2021-05-02 11:51:54,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:51:54,467 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 229 transitions. [2021-05-02 11:51:54,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:51:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 229 transitions. [2021-05-02 11:51:54,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 11:51:54,469 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:51:54,469 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:51:54,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 11:51:54,686 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:51:54,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:51:54,687 INFO L82 PathProgramCache]: Analyzing trace with hash -146750412, now seen corresponding path program 4 times [2021-05-02 11:51:54,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:51:54,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287810546] [2021-05-02 11:51:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:51:54,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:54,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:51:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:54,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 11:51:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:51:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 11:51:54,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:51:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287810546] [2021-05-02 11:51:54,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287810546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:51:54,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458631998] [2021-05-02 11:51:54,948 INFO L93 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:51:55,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 11:51:55,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:51:55,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 11:51:55,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:51:55,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,070 INFO L388 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 16 treesize of output 12 [2021-05-02 11:51:55,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:55,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:55,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:55,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2021-05-02 11:51:55,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:55,196 INFO L388 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 28 treesize of output 27 [2021-05-02 11:51:55,198 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:55,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:55,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:55,205 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-05-02 11:51:55,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:55,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:55,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:51:55,305 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:55,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-05-02 11:51:55,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:55,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:55,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:55,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2021-05-02 11:51:55,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,599 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:55,599 INFO L388 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 26 treesize of output 10 [2021-05-02 11:51:55,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:51:55,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:51:55,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:51:55,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:51:55,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:51:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 11:51:55,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458631998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:51:55,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:51:55,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2021-05-02 11:51:55,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93521256] [2021-05-02 11:51:55,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 11:51:55,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:51:55,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 11:51:55,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 11:51:55,660 INFO L87 Difference]: Start difference. First operand 188 states and 229 transitions. Second operand has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 31 states have internal predecessors, (78), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:52:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:52:27,578 INFO L93 Difference]: Finished difference Result 401 states and 511 transitions. [2021-05-02 11:52:27,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 11:52:27,578 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 31 states have internal predecessors, (78), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 49 [2021-05-02 11:52:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:52:27,580 INFO L225 Difference]: With dead ends: 401 [2021-05-02 11:52:27,580 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 11:52:27,581 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 3647.5ms TimeCoverageRelationStatistics Valid=618, Invalid=4073, Unknown=1, NotChecked=0, Total=4692 [2021-05-02 11:52:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 11:52:27,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 230. [2021-05-02 11:52:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 216 states have (on average 1.2453703703703705) internal successors, (269), 219 states have internal predecessors, (269), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 11:52:27,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 283 transitions. [2021-05-02 11:52:27,608 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 283 transitions. Word has length 49 [2021-05-02 11:52:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:52:27,608 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 283 transitions. [2021-05-02 11:52:27,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 31 states have internal predecessors, (78), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:52:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 283 transitions. [2021-05-02 11:52:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 11:52:27,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:52:27,609 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:52:27,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 11:52:27,831 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:52:27,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:52:27,831 INFO L82 PathProgramCache]: Analyzing trace with hash 554440741, now seen corresponding path program 1 times [2021-05-02 11:52:27,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:52:27,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673025589] [2021-05-02 11:52:27,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:52:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:52:28,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:52:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:52:28,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-05-02 11:52:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:52:28,604 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:52:28,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:52:28,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673025589] [2021-05-02 11:52:28,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673025589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:52:28,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079745603] [2021-05-02 11:52:28,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:52:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:52:28,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 11:52:28,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:52:28,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:28,782 INFO L388 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 28 treesize of output 27 [2021-05-02 11:52:28,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:52:28,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:52:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:52:28,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2021-05-02 11:52:28,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,856 INFO L388 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 0 case distinctions, treesize of input 56 treesize of output 45 [2021-05-02 11:52:28,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:28,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:28,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:28,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:28,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:28,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:28,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:28,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 34 [2021-05-02 11:52:28,869 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 11:52:28,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:52:28,874 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:52:28,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:52:28,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:52:28,881 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:64, output treesize:44 [2021-05-02 11:52:29,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:52:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:52:29,069 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 11:52:29,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2021-05-02 11:52:29,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:52:29,087 INFO L628 ElimStorePlain]: treesize reduction 17, result has 71.7 percent of original size [2021-05-02 11:52:29,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,089 INFO L550 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. [2021-05-02 11:52:29,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:43 [2021-05-02 11:52:29,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:52:29,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:52:29,348 INFO L354 Elim1Store]: treesize reduction 58, result has 32.6 percent of original size [2021-05-02 11:52:29,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 67 [2021-05-02 11:52:29,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:52:29,363 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:52:29,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:52:29,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:28 [2021-05-02 11:52:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:29,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,644 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:52:31,645 INFO L388 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 26 treesize of output 10 [2021-05-02 11:52:31,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:52:31,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:52:31,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:52:31,648 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:52:31,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:52:31,709 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 11:52:31,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079745603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:52:31,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:52:31,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 41 [2021-05-02 11:52:31,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441237074] [2021-05-02 11:52:31,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 11:52:31,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:52:31,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 11:52:31,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1463, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 11:52:31,711 INFO L87 Difference]: Start difference. First operand 230 states and 283 transitions. Second operand has 41 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:53:09,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:53:09,694 INFO L93 Difference]: Finished difference Result 290 states and 348 transitions. [2021-05-02 11:53:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 11:53:09,695 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2021-05-02 11:53:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:53:09,696 INFO L225 Difference]: With dead ends: 290 [2021-05-02 11:53:09,697 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 11:53:09,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1435 ImplicationChecksByTransitivity, 10502.1ms TimeCoverageRelationStatistics Valid=481, Invalid=4208, Unknown=3, NotChecked=0, Total=4692 [2021-05-02 11:53:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 11:53:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 243. [2021-05-02 11:53:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 229 states have (on average 1.2314410480349345) internal successors, (282), 232 states have internal predecessors, (282), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 11:53:09,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 296 transitions. [2021-05-02 11:53:09,717 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 296 transitions. Word has length 51 [2021-05-02 11:53:09,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:53:09,717 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 296 transitions. [2021-05-02 11:53:09,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.75) internal successors, (70), 37 states have internal predecessors, (70), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:53:09,717 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 296 transitions. [2021-05-02 11:53:09,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 11:53:09,718 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:53:09,718 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:53:09,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:53:09,921 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:53:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:53:09,921 INFO L82 PathProgramCache]: Analyzing trace with hash -565351876, now seen corresponding path program 1 times [2021-05-02 11:53:09,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:53:09,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660659117] [2021-05-02 11:53:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:53:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:53:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:53:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:53:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 11:53:09,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:53:09,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660659117] [2021-05-02 11:53:09,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660659117] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:53:09,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:53:09,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 11:53:09,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48476628] [2021-05-02 11:53:09,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 11:53:09,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:53:09,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 11:53:09,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:53:09,970 INFO L87 Difference]: Start difference. First operand 243 states and 296 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:53:10,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:53:10,046 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2021-05-02 11:53:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 11:53:10,047 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 11:53:10,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:53:10,048 INFO L225 Difference]: With dead ends: 300 [2021-05-02 11:53:10,048 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 11:53:10,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 11:53:10,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 11:53:10,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2021-05-02 11:53:10,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 224 states have (on average 1.2053571428571428) internal successors, (270), 227 states have internal predecessors, (270), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 11:53:10,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 284 transitions. [2021-05-02 11:53:10,068 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 284 transitions. Word has length 51 [2021-05-02 11:53:10,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:53:10,068 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 284 transitions. [2021-05-02 11:53:10,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:53:10,068 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 284 transitions. [2021-05-02 11:53:10,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 11:53:10,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:53:10,070 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:53:10,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 11:53:10,071 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:53:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:53:10,073 INFO L82 PathProgramCache]: Analyzing trace with hash -186725060, now seen corresponding path program 5 times [2021-05-02 11:53:10,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:53:10,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371814727] [2021-05-02 11:53:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:53:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:53:10,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:53:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:53:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 11:53:10,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:53:10,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371814727] [2021-05-02 11:53:10,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371814727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:53:10,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799821711] [2021-05-02 11:53:10,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:53:10,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 11:53:10,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:53:10,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 11:53:10,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:53:10,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:53:11,219 INFO L388 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 36 treesize of output 27 [2021-05-02 11:53:11,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:53:11,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:11,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:53:11,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:50, output treesize:47 [2021-05-02 11:53:11,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:53:11,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:53:11,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:11,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 50 treesize of output 43 [2021-05-02 11:53:11,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:53:11,387 INFO L628 ElimStorePlain]: treesize reduction 12, result has 73.9 percent of original size [2021-05-02 11:53:11,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:53:11,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:31 [2021-05-02 11:53:11,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:53:11,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:53:11,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:53:11,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:11,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2021-05-02 11:53:11,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:53:11,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:11,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:53:11,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:31 [2021-05-02 11:53:11,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:11,763 INFO L388 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 12 [2021-05-02 11:53:11,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:53:11,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:11,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:53:11,767 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-05-02 11:53:11,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 11:53:11,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799821711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:53:11,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:53:11,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 40 [2021-05-02 11:53:11,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140306814] [2021-05-02 11:53:11,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 11:53:11,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:53:11,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 11:53:11,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 11:53:11,827 INFO L87 Difference]: Start difference. First operand 238 states and 284 transitions. Second operand has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:53:15,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:53:15,091 INFO L93 Difference]: Finished difference Result 495 states and 614 transitions. [2021-05-02 11:53:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 11:53:15,092 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 11:53:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:53:15,094 INFO L225 Difference]: With dead ends: 495 [2021-05-02 11:53:15,094 INFO L226 Difference]: Without dead ends: 408 [2021-05-02 11:53:15,095 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 3089.7ms TimeCoverageRelationStatistics Valid=737, Invalid=6573, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 11:53:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-02 11:53:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 286. [2021-05-02 11:53:15,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 272 states have (on average 1.2058823529411764) internal successors, (328), 275 states have internal predecessors, (328), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 11:53:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 342 transitions. [2021-05-02 11:53:15,119 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 342 transitions. Word has length 51 [2021-05-02 11:53:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:53:15,119 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 342 transitions. [2021-05-02 11:53:15,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 37 states have internal predecessors, (79), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:53:15,119 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 342 transitions. [2021-05-02 11:53:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 11:53:15,120 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:53:15,120 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:53:15,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 11:53:15,337 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:53:15,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:53:15,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1518785839, now seen corresponding path program 2 times [2021-05-02 11:53:15,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:53:15,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777678559] [2021-05-02 11:53:15,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:53:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:53:15,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:53:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:53:16,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 11:53:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:53:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:53:16,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:53:16,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777678559] [2021-05-02 11:53:16,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777678559] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:53:16,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86791744] [2021-05-02 11:53:16,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:53:16,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 11:53:16,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:53:16,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 11:53:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:53:16,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,228 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 11:53:16,229 INFO L388 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 36 treesize of output 27 [2021-05-02 11:53:16,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:53:16,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:16,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:53:16,237 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-05-02 11:53:16,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,402 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-05-02 11:53:16,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2021-05-02 11:53:16,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:53:16,411 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:16,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:53:16,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:32 [2021-05-02 11:53:16,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,695 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-05-02 11:53:16,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-05-02 11:53:16,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:53:16,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:16,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:53:16,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:25 [2021-05-02 11:53:16,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:16,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,976 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-05-02 11:53:32,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2021-05-02 11:53:32,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:53:32,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:53:32,983 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:53:32,983 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2021-05-02 11:53:32,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:32,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:53:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 11:53:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86791744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:53:33,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:53:33,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 46 [2021-05-02 11:53:33,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863731387] [2021-05-02 11:53:33,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 11:53:33,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:53:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 11:53:33,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1876, Unknown=3, NotChecked=0, Total=2070 [2021-05-02 11:53:33,050 INFO L87 Difference]: Start difference. First operand 286 states and 342 transitions. Second operand has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 42 states have internal predecessors, (88), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:54:30,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:54:30,588 INFO L93 Difference]: Finished difference Result 405 states and 481 transitions. [2021-05-02 11:54:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 11:54:30,588 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 42 states have internal predecessors, (88), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 54 [2021-05-02 11:54:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:54:30,590 INFO L225 Difference]: With dead ends: 405 [2021-05-02 11:54:30,590 INFO L226 Difference]: Without dead ends: 403 [2021-05-02 11:54:30,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2299 ImplicationChecksByTransitivity, 22836.6ms TimeCoverageRelationStatistics Valid=620, Invalid=6017, Unknown=5, NotChecked=0, Total=6642 [2021-05-02 11:54:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-05-02 11:54:30,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 292. [2021-05-02 11:54:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 278 states have (on average 1.20863309352518) internal successors, (336), 281 states have internal predecessors, (336), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 11:54:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 350 transitions. [2021-05-02 11:54:30,613 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 350 transitions. Word has length 54 [2021-05-02 11:54:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:54:30,613 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 350 transitions. [2021-05-02 11:54:30,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 42 states have internal predecessors, (88), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:54:30,614 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 350 transitions. [2021-05-02 11:54:30,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 11:54:30,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:54:30,614 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:54:30,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 11:54:30,829 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:54:30,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:54:30,829 INFO L82 PathProgramCache]: Analyzing trace with hash -676055644, now seen corresponding path program 2 times [2021-05-02 11:54:30,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:54:30,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465254235] [2021-05-02 11:54:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:54:30,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:54:31,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:54:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:54:31,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-05-02 11:54:31,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:54:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:54:31,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:54:31,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465254235] [2021-05-02 11:54:31,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465254235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:54:31,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151264380] [2021-05-02 11:54:31,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:54:31,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 11:54:31,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:54:31,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 11:54:31,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:54:31,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:31,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:31,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:31,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:31,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:31,886 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 11:54:31,887 INFO L388 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 36 treesize of output 27 [2021-05-02 11:54:31,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:54:31,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:54:31,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:54:31,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:41 [2021-05-02 11:54:32,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,074 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-05-02 11:54:32,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2021-05-02 11:54:32,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:54:32,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:54:32,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:54:32,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:32 [2021-05-02 11:54:32,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,278 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-05-02 11:54:32,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-05-02 11:54:32,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:54:32,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:54:32,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,290 INFO L550 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. [2021-05-02 11:54:32,291 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:53 [2021-05-02 11:54:32,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,570 INFO L354 Elim1Store]: treesize reduction 239, result has 12.1 percent of original size [2021-05-02 11:54:32,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 51 [2021-05-02 11:54:32,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:54:32,581 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:54:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 11:54:32,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:53 [2021-05-02 11:54:32,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,955 INFO L354 Elim1Store]: treesize reduction 244, result has 16.7 percent of original size [2021-05-02 11:54:32,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 67 [2021-05-02 11:54:32,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:54:32,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:54:32,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:54:32,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:72, output treesize:25 [2021-05-02 11:54:32,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:32,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:54:33,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:07,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,233 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-05-02 11:55:10,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2021-05-02 11:55:10,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:55:10,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:55:10,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:55:10,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2021-05-02 11:55:10,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:55:10,382 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 11:55:10,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151264380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:55:10,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:55:10,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-05-02 11:55:10,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672813465] [2021-05-02 11:55:10,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 11:55:10,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:55:10,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 11:55:10,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3056, Unknown=14, NotChecked=0, Total=3306 [2021-05-02 11:55:10,384 INFO L87 Difference]: Start difference. First operand 292 states and 350 transitions. Second operand has 58 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:56:01,238 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-05-02 11:56:17,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:56:17,769 INFO L93 Difference]: Finished difference Result 360 states and 426 transitions. [2021-05-02 11:56:17,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 11:56:17,770 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-05-02 11:56:17,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:56:17,772 INFO L225 Difference]: With dead ends: 360 [2021-05-02 11:56:17,772 INFO L226 Difference]: Without dead ends: 318 [2021-05-02 11:56:17,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 49068.3ms TimeCoverageRelationStatistics Valid=627, Invalid=7545, Unknown=18, NotChecked=0, Total=8190 [2021-05-02 11:56:17,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-05-02 11:56:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 255. [2021-05-02 11:56:17,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 245 states have (on average 1.236734693877551) internal successors, (303), 246 states have internal predecessors, (303), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 11:56:17,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 312 transitions. [2021-05-02 11:56:17,797 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 312 transitions. Word has length 56 [2021-05-02 11:56:17,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:56:17,797 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 312 transitions. [2021-05-02 11:56:17,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 55 states have (on average 1.709090909090909) internal successors, (94), 54 states have internal predecessors, (94), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 11:56:17,797 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 312 transitions. [2021-05-02 11:56:17,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 11:56:17,798 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:56:17,798 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:56:18,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 11:56:18,013 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:56:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:56:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1953283570, now seen corresponding path program 5 times [2021-05-02 11:56:18,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:56:18,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345711506] [2021-05-02 11:56:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:56:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:56:18,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:56:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:56:18,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 11:56:18,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:56:18,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 11:56:18,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:56:18,597 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 11:56:18,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:56:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345711506] [2021-05-02 11:56:18,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345711506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:56:18,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245089343] [2021-05-02 11:56:18,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:56:18,784 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 11:56:18,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:56:18,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 11:56:18,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:56:18,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,851 INFO L388 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 [2021-05-02 11:56:18,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:56:18,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:56:18,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:56:18,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-05-02 11:56:18,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,912 INFO L388 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 0 case distinctions, treesize of input 34 treesize of output 29 [2021-05-02 11:56:18,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:56:18,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:56:18,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:56:18,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 25 [2021-05-02 11:56:18,926 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 11:56:18,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:56:18,933 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:56:18,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:56:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:56:18,946 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:47, output treesize:32 [2021-05-02 11:56:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:18,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:19,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:19,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:19,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:19,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:23,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:56:27,375 INFO L388 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 26 treesize of output 10 [2021-05-02 11:56:27,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:56:27,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:56:27,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:56:27,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:56:27,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:56:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 11:56:27,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245089343] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:56:27,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:56:27,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 25 [2021-05-02 11:56:27,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264222592] [2021-05-02 11:56:27,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 11:56:27,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:56:27,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 11:56:27,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=519, Unknown=2, NotChecked=0, Total=600 [2021-05-02 11:56:27,440 INFO L87 Difference]: Start difference. First operand 255 states and 312 transitions. Second operand has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 11:57:02,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:57:02,955 INFO L93 Difference]: Finished difference Result 417 states and 509 transitions. [2021-05-02 11:57:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 11:57:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 57 [2021-05-02 11:57:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:57:02,956 INFO L225 Difference]: With dead ends: 417 [2021-05-02 11:57:02,956 INFO L226 Difference]: Without dead ends: 415 [2021-05-02 11:57:02,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 13522.0ms TimeCoverageRelationStatistics Valid=262, Invalid=1626, Unknown=4, NotChecked=0, Total=1892 [2021-05-02 11:57:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2021-05-02 11:57:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 314. [2021-05-02 11:57:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 294 states have (on average 1.2244897959183674) internal successors, (360), 297 states have internal predecessors, (360), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 11:57:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 381 transitions. [2021-05-02 11:57:02,985 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 381 transitions. Word has length 57 [2021-05-02 11:57:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:57:02,985 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 381 transitions. [2021-05-02 11:57:02,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 11:57:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 381 transitions. [2021-05-02 11:57:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 11:57:02,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:57:02,986 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:57:03,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 11:57:03,191 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:57:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:57:03,191 INFO L82 PathProgramCache]: Analyzing trace with hash -439649873, now seen corresponding path program 1 times [2021-05-02 11:57:03,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:57:03,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684957642] [2021-05-02 11:57:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:57:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:57:03,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:57:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:57:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-05-02 11:57:03,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:57:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684957642] [2021-05-02 11:57:03,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684957642] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:57:03,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431677344] [2021-05-02 11:57:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:57:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:57:03,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 11:57:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:57:03,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:57:03,736 INFO L388 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 29 treesize of output 28 [2021-05-02 11:57:03,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:57:03,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:57:03,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:57:03,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:28 [2021-05-02 11:57:03,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:57:03,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:57:03,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:57:03,862 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:57:03,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 11:57:03,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:57:03,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:57:03,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:57:03,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2021-05-02 11:57:03,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:57:03,943 INFO L388 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 26 treesize of output 10 [2021-05-02 11:57:03,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:57:03,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:57:03,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:57:03,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:57:03,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:03,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 11:57:04,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431677344] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:57:04,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:57:04,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-05-02 11:57:04,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584880688] [2021-05-02 11:57:04,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 11:57:04,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:57:04,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 11:57:04,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-05-02 11:57:04,035 INFO L87 Difference]: Start difference. First operand 314 states and 381 transitions. Second operand has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:57:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:57:06,207 INFO L93 Difference]: Finished difference Result 901 states and 1120 transitions. [2021-05-02 11:57:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 11:57:06,209 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2021-05-02 11:57:06,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:57:06,211 INFO L225 Difference]: With dead ends: 901 [2021-05-02 11:57:06,211 INFO L226 Difference]: Without dead ends: 740 [2021-05-02 11:57:06,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1494.8ms TimeCoverageRelationStatistics Valid=395, Invalid=3145, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 11:57:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-05-02 11:57:06,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 449. [2021-05-02 11:57:06,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 429 states have (on average 1.205128205128205) internal successors, (517), 432 states have internal predecessors, (517), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 11:57:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 538 transitions. [2021-05-02 11:57:06,259 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 538 transitions. Word has length 57 [2021-05-02 11:57:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:57:06,259 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 538 transitions. [2021-05-02 11:57:06,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 3.066666666666667) internal successors, (92), 29 states have internal predecessors, (92), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:57:06,259 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 538 transitions. [2021-05-02 11:57:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 11:57:06,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:57:06,260 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:57:06,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:57:06,466 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:57:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:57:06,466 INFO L82 PathProgramCache]: Analyzing trace with hash 358973142, now seen corresponding path program 1 times [2021-05-02 11:57:06,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:57:06,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618527156] [2021-05-02 11:57:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:57:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:57:06,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:57:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:57:06,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-02 11:57:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:57:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 11:57:06,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:57:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618527156] [2021-05-02 11:57:06,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618527156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:57:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547315194] [2021-05-02 11:57:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:57:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:57:06,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 11:57:06,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:57:06,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:06,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:06,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:06,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:06,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:06,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:06,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:06,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:06,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,040 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 11:57:07,040 INFO L388 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 36 treesize of output 27 [2021-05-02 11:57:07,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:57:07,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:57:07,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:57:07,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:36 [2021-05-02 11:57:07,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,250 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-05-02 11:57:07,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 31 [2021-05-02 11:57:07,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:57:07,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:57:07,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:57:07,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:28 [2021-05-02 11:57:07,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:07,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,596 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 11:57:11,597 INFO L388 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 36 treesize of output 12 [2021-05-02 11:57:11,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:57:11,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:57:11,602 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:57:11,602 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-05-02 11:57:11,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:57:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 10 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 11:57:11,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547315194] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:57:11,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:57:11,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 35 [2021-05-02 11:57:11,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505948967] [2021-05-02 11:57:11,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 11:57:11,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:57:11,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 11:57:11,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1071, Unknown=1, NotChecked=0, Total=1190 [2021-05-02 11:57:11,674 INFO L87 Difference]: Start difference. First operand 449 states and 538 transitions. Second operand has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:58:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:58:46,763 INFO L93 Difference]: Finished difference Result 686 states and 826 transitions. [2021-05-02 11:58:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 11:58:46,764 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-05-02 11:58:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:58:46,766 INFO L225 Difference]: With dead ends: 686 [2021-05-02 11:58:46,766 INFO L226 Difference]: Without dead ends: 601 [2021-05-02 11:58:46,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2938 ImplicationChecksByTransitivity, 23740.6ms TimeCoverageRelationStatistics Valid=935, Invalid=8758, Unknown=9, NotChecked=0, Total=9702 [2021-05-02 11:58:46,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-05-02 11:58:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 455. [2021-05-02 11:58:46,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 435 states have (on average 1.2045977011494253) internal successors, (524), 438 states have internal predecessors, (524), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 11:58:46,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 545 transitions. [2021-05-02 11:58:46,811 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 545 transitions. Word has length 59 [2021-05-02 11:58:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:58:46,811 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 545 transitions. [2021-05-02 11:58:46,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 31 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:58:46,811 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 545 transitions. [2021-05-02 11:58:46,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 11:58:46,812 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:58:46,812 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:58:47,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 11:58:47,027 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:58:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:58:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash -666909812, now seen corresponding path program 2 times [2021-05-02 11:58:47,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:58:47,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849778171] [2021-05-02 11:58:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:58:47,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:58:47,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:58:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:58:47,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-02 11:58:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:58:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 11:58:47,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:58:47,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849778171] [2021-05-02 11:58:47,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849778171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:58:47,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758023646] [2021-05-02 11:58:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:58:47,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 11:58:47,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:58:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 11:58:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:58:47,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,735 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-05-02 11:58:47,736 INFO L388 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 23 treesize of output 22 [2021-05-02 11:58:47,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:58:47,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:58:47,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:58:47,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-05-02 11:58:47,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:47,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:49,775 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.offset_BEFORE_CALL_10| Int) (|v_main_~#v~0.base_BEFORE_CALL_10| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_10|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_10| 4)) (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_10| 8))))) is different from true [2021-05-02 11:58:49,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:49,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:49,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:49,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:49,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:51,840 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 11:58:51,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:51,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:51,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:51,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:51,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,902 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 17 [2021-05-02 11:58:55,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:55,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:56,007 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 11:58:56,007 INFO L388 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 10 [2021-05-02 11:58:56,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:58:56,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:58:56,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:58:56,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-05-02 11:58:56,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:56,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:58:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 3 proven. 44 refuted. 0 times theorem prover too weak. 16 trivial. 1 not checked. [2021-05-02 11:58:58,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758023646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:58:58,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:58:58,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 29 [2021-05-02 11:58:58,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326342991] [2021-05-02 11:58:58,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 11:58:58,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:58:58,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 11:58:58,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=670, Unknown=3, NotChecked=52, Total=812 [2021-05-02 11:58:58,095 INFO L87 Difference]: Start difference. First operand 455 states and 545 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 25 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:59:07,758 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 11:59:09,848 WARN L205 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 11:59:13,994 WARN L205 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-02 11:59:18,269 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-02 11:59:22,376 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-02 11:59:22,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:59:22,470 INFO L93 Difference]: Finished difference Result 595 states and 711 transitions. [2021-05-02 11:59:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 11:59:22,471 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 25 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-05-02 11:59:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:59:22,473 INFO L225 Difference]: With dead ends: 595 [2021-05-02 11:59:22,473 INFO L226 Difference]: Without dead ends: 593 [2021-05-02 11:59:22,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1008 ImplicationChecksByTransitivity, 31927.1ms TimeCoverageRelationStatistics Valid=436, Invalid=3345, Unknown=5, NotChecked=120, Total=3906 [2021-05-02 11:59:22,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2021-05-02 11:59:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 448. [2021-05-02 11:59:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 428 states have (on average 1.2032710280373833) internal successors, (515), 431 states have internal predecessors, (515), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 11:59:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 536 transitions. [2021-05-02 11:59:22,517 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 536 transitions. Word has length 59 [2021-05-02 11:59:22,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:59:22,517 INFO L480 AbstractCegarLoop]: Abstraction has 448 states and 536 transitions. [2021-05-02 11:59:22,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 25 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 11:59:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 536 transitions. [2021-05-02 11:59:22,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 11:59:22,519 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:59:22,519 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:59:22,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:59:22,733 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:59:22,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:59:22,733 INFO L82 PathProgramCache]: Analyzing trace with hash 356238102, now seen corresponding path program 3 times [2021-05-02 11:59:22,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:59:22,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540897293] [2021-05-02 11:59:22,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:59:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:59:23,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:59:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:59:23,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-05-02 11:59:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:59:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 7 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:59:24,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:59:24,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540897293] [2021-05-02 11:59:24,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540897293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:59:24,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519647437] [2021-05-02 11:59:24,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 11:59:24,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 11:59:24,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 11:59:24,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 11:59:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 11:59:24,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,295 INFO L388 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 [2021-05-02 11:59:24,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:24,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:3 [2021-05-02 11:59:24,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,392 INFO L388 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 0 case distinctions, treesize of input 30 treesize of output 25 [2021-05-02 11:59:24,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 22 [2021-05-02 11:59:24,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:24,418 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:24,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,436 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:36, output treesize:22 [2021-05-02 11:59:24,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:59:24,574 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 11:59:24,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-05-02 11:59:24,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:24,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-05-02 11:59:24,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:59:24,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:24,817 INFO L354 Elim1Store]: treesize reduction 165, result has 19.9 percent of original size [2021-05-02 11:59:24,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 58 treesize of output 77 [2021-05-02 11:59:24,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:24,837 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:59:24,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:67, output treesize:75 [2021-05-02 11:59:25,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 11:59:25,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:25,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 52 [2021-05-02 11:59:25,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:59:25,276 INFO L628 ElimStorePlain]: treesize reduction 12, result has 77.8 percent of original size [2021-05-02 11:59:25,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 11:59:25,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:35 [2021-05-02 11:59:25,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,662 INFO L388 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 0 case distinctions, treesize of input 34 treesize of output 27 [2021-05-02 11:59:25,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 11:59:25,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 31 [2021-05-02 11:59:25,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 11:59:25,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:25,697 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:59:25,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:25,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:59:25,712 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:37, output treesize:19 [2021-05-02 11:59:25,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:25,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:33,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:33,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:33,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:33,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:33,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:34,229 INFO L388 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 26 treesize of output 10 [2021-05-02 11:59:34,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 11:59:34,233 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 11:59:34,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 11:59:34,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 11:59:34,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 11:59:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:59:34,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519647437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 11:59:34,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 11:59:34,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 49 [2021-05-02 11:59:34,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361129532] [2021-05-02 11:59:34,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 11:59:34,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:59:34,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 11:59:34,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2067, Unknown=2, NotChecked=0, Total=2352 [2021-05-02 11:59:34,323 INFO L87 Difference]: Start difference. First operand 448 states and 536 transitions. Second operand has 49 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 45 states have internal predecessors, (82), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 12:00:51,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:00:51,572 INFO L93 Difference]: Finished difference Result 614 states and 721 transitions. [2021-05-02 12:00:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 12:00:51,572 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 45 states have internal predecessors, (82), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2021-05-02 12:00:51,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:00:51,574 INFO L225 Difference]: With dead ends: 614 [2021-05-02 12:00:51,574 INFO L226 Difference]: Without dead ends: 585 [2021-05-02 12:00:51,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 37 SyntacticMatches, 15 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3384 ImplicationChecksByTransitivity, 35532.1ms TimeCoverageRelationStatistics Valid=994, Invalid=8695, Unknown=13, NotChecked=0, Total=9702 [2021-05-02 12:00:51,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-05-02 12:00:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 457. [2021-05-02 12:00:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 435 states have (on average 1.2) internal successors, (522), 438 states have internal predecessors, (522), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 12:00:51,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 545 transitions. [2021-05-02 12:00:51,625 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 545 transitions. Word has length 59 [2021-05-02 12:00:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:00:51,626 INFO L480 AbstractCegarLoop]: Abstraction has 457 states and 545 transitions. [2021-05-02 12:00:51,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 48 states have (on average 1.7083333333333333) internal successors, (82), 45 states have internal predecessors, (82), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 12:00:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 545 transitions. [2021-05-02 12:00:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 12:00:51,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:00:51,627 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:00:51,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-05-02 12:00:51,840 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:00:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:00:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1054815615, now seen corresponding path program 1 times [2021-05-02 12:00:51,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:00:51,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116517585] [2021-05-02 12:00:51,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:00:51,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:00:52,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:00:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:00:52,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-05-02 12:00:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:00:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 12:00:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:00:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:00:52,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:00:52,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116517585] [2021-05-02 12:00:52,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116517585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:00:52,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656541591] [2021-05-02 12:00:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:00:52,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:00:52,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 12:00:52,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:00:52,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:00:52,804 INFO L388 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 34 treesize of output 33 [2021-05-02 12:00:52,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:00:52,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:00:52,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 12:00:52,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:44 [2021-05-02 12:00:52,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:52,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:00:53,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:00:53,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 12:00:53,483 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:00:53,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 13 [2021-05-02 12:00:53,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:00:53,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:00:53,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:00:53,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:42, output treesize:3 [2021-05-02 12:00:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:00:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 12:00:53,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656541591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:00:53,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:00:53,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 30 [2021-05-02 12:00:53,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479272666] [2021-05-02 12:00:53,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 12:00:53,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:00:53,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 12:00:53,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:00:53,562 INFO L87 Difference]: Start difference. First operand 457 states and 545 transitions. Second operand has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 12:01:38,601 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-02 12:01:38,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:01:38,944 INFO L93 Difference]: Finished difference Result 598 states and 715 transitions. [2021-05-02 12:01:38,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 12:01:38,946 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 62 [2021-05-02 12:01:38,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:01:38,948 INFO L225 Difference]: With dead ends: 598 [2021-05-02 12:01:38,949 INFO L226 Difference]: Without dead ends: 596 [2021-05-02 12:01:38,950 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 2663.8ms TimeCoverageRelationStatistics Valid=314, Invalid=2136, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:01:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-05-02 12:01:39,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 466. [2021-05-02 12:01:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 444 states have (on average 1.2027027027027026) internal successors, (534), 447 states have internal predecessors, (534), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 12:01:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 557 transitions. [2021-05-02 12:01:39,012 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 557 transitions. Word has length 62 [2021-05-02 12:01:39,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:01:39,012 INFO L480 AbstractCegarLoop]: Abstraction has 466 states and 557 transitions. [2021-05-02 12:01:39,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 27 states have internal predecessors, (83), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 12:01:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 557 transitions. [2021-05-02 12:01:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 12:01:39,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:01:39,014 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:01:39,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:01:39,229 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:01:39,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:01:39,230 INFO L82 PathProgramCache]: Analyzing trace with hash 862255409, now seen corresponding path program 3 times [2021-05-02 12:01:39,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:01:39,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493236408] [2021-05-02 12:01:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:01:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:01:39,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:01:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:01:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 66 proven. 7 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-02 12:01:39,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:01:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493236408] [2021-05-02 12:01:39,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493236408] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:01:39,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069971827] [2021-05-02 12:01:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:01:39,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 12:01:39,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:01:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 12:01:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:01:39,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:39,959 INFO L388 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 28 treesize of output 27 [2021-05-02 12:01:39,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:01:39,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:39,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 12:01:39,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2021-05-02 12:01:39,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:39,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,555 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-05-02 12:01:40,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:40,756 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-05-02 12:01:40,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 67 [2021-05-02 12:01:40,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:01:40,833 INFO L628 ElimStorePlain]: treesize reduction 8, result has 87.5 percent of original size [2021-05-02 12:01:40,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 12:01:40,842 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:53 [2021-05-02 12:01:40,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:40,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:41,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:41,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 12:01:41,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 12:01:41,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:41,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 16 [2021-05-02 12:01:41,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:01:41,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:41,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:01:41,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:3 [2021-05-02 12:01:41,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:41,382 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 42 proven. 18 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 12:01:41,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069971827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:01:41,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:01:41,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 18] total 25 [2021-05-02 12:01:41,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322584306] [2021-05-02 12:01:41,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 12:01:41,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:01:41,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 12:01:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:01:41,385 INFO L87 Difference]: Start difference. First operand 466 states and 557 transitions. Second operand has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:01:43,569 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2021-05-02 12:01:43,851 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-02 12:01:45,667 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-05-02 12:01:47,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:01:47,879 INFO L93 Difference]: Finished difference Result 799 states and 965 transitions. [2021-05-02 12:01:47,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 12:01:47,881 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 12:01:47,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:01:47,883 INFO L225 Difference]: With dead ends: 799 [2021-05-02 12:01:47,883 INFO L226 Difference]: Without dead ends: 702 [2021-05-02 12:01:47,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 4969.8ms TimeCoverageRelationStatistics Valid=852, Invalid=3840, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 12:01:47,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-05-02 12:01:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 402. [2021-05-02 12:01:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 380 states have (on average 1.1894736842105262) internal successors, (452), 383 states have internal predecessors, (452), 12 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (11), 8 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 12:01:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 475 transitions. [2021-05-02 12:01:47,937 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 475 transitions. Word has length 60 [2021-05-02 12:01:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:01:47,937 INFO L480 AbstractCegarLoop]: Abstraction has 402 states and 475 transitions. [2021-05-02 12:01:47,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 23 states have internal predecessors, (76), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:01:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 475 transitions. [2021-05-02 12:01:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 12:01:47,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:01:47,939 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:01:48,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 12:01:48,153 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:01:48,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:01:48,154 INFO L82 PathProgramCache]: Analyzing trace with hash 593358868, now seen corresponding path program 4 times [2021-05-02 12:01:48,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:01:48,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059487042] [2021-05-02 12:01:48,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:01:48,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:01:48,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:01:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:01:48,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-05-02 12:01:48,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:01:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 12:01:48,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:01:48,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059487042] [2021-05-02 12:01:48,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059487042] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:01:48,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360496067] [2021-05-02 12:01:48,467 INFO L93 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:01:48,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:01:48,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:01:48,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 12:01:48,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:01:48,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:48,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 12:01:48,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360496067] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:01:48,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:01:48,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 17 [2021-05-02 12:01:48,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041757692] [2021-05-02 12:01:48,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:01:48,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:01:48,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:01:48,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:01:48,774 INFO L87 Difference]: Start difference. First operand 402 states and 475 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 12:01:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:01:49,633 INFO L93 Difference]: Finished difference Result 613 states and 721 transitions. [2021-05-02 12:01:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 12:01:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2021-05-02 12:01:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:01:49,637 INFO L225 Difference]: With dead ends: 613 [2021-05-02 12:01:49,637 INFO L226 Difference]: Without dead ends: 540 [2021-05-02 12:01:49,638 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:01:49,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-05-02 12:01:49,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 367. [2021-05-02 12:01:49,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 355 states have (on average 1.1830985915492958) internal successors, (420), 356 states have internal predecessors, (420), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 12:01:49,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 431 transitions. [2021-05-02 12:01:49,696 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 431 transitions. Word has length 61 [2021-05-02 12:01:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:01:49,696 INFO L480 AbstractCegarLoop]: Abstraction has 367 states and 431 transitions. [2021-05-02 12:01:49,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 12:01:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 431 transitions. [2021-05-02 12:01:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 12:01:49,697 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:01:49,697 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:01:49,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-02 12:01:49,921 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:01:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:01:49,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1873320726, now seen corresponding path program 2 times [2021-05-02 12:01:49,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:01:49,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787797192] [2021-05-02 12:01:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:01:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:01:51,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:01:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:01:51,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-05-02 12:01:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:01:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 75 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:01:51,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:01:51,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787797192] [2021-05-02 12:01:51,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787797192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:01:51,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811621795] [2021-05-02 12:01:51,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:01:51,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:01:51,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:01:51,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 12:01:51,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:01:51,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,415 INFO L388 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 16 treesize of output 12 [2021-05-02 12:01:51,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:01:51,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:51,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:01:51,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:10 [2021-05-02 12:01:51,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,553 INFO L388 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 28 treesize of output 27 [2021-05-02 12:01:51,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:01:51,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:51,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:01:51,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:30 [2021-05-02 12:01:51,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,817 INFO L388 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 0 case distinctions, treesize of input 48 treesize of output 41 [2021-05-02 12:01:51,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:51,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:51,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 34 [2021-05-02 12:01:51,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 12:01:51,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:51,869 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:01:51,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:51,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:01:51,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:67, output treesize:32 [2021-05-02 12:01:52,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:52,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:52,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:01:52,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:52,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-05-02 12:01:52,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:01:52,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:52,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:01:52,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:19 [2021-05-02 12:01:52,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:52,696 INFO L388 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 26 treesize of output 10 [2021-05-02 12:01:52,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:01:52,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:01:52,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:01:52,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 12:01:52,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:01:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 12:01:52,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811621795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:01:52,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:01:52,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 32 [2021-05-02 12:01:52,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207510593] [2021-05-02 12:01:52,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 12:01:52,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:01:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 12:01:52,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:01:52,823 INFO L87 Difference]: Start difference. First operand 367 states and 431 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 12:02:20,727 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 12:02:21,599 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-05-02 12:02:21,861 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-02 12:02:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:02:27,903 INFO L93 Difference]: Finished difference Result 599 states and 705 transitions. [2021-05-02 12:02:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 12:02:27,904 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 62 [2021-05-02 12:02:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:02:27,906 INFO L225 Difference]: With dead ends: 599 [2021-05-02 12:02:27,906 INFO L226 Difference]: Without dead ends: 532 [2021-05-02 12:02:27,908 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 4243.0ms TimeCoverageRelationStatistics Valid=502, Invalid=3788, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 12:02:27,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-05-02 12:02:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 425. [2021-05-02 12:02:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 406 states have (on average 1.1748768472906403) internal successors, (477), 409 states have internal predecessors, (477), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 12:02:27,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 496 transitions. [2021-05-02 12:02:27,981 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 496 transitions. Word has length 62 [2021-05-02 12:02:27,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:02:27,982 INFO L480 AbstractCegarLoop]: Abstraction has 425 states and 496 transitions. [2021-05-02 12:02:27,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 28 states have internal predecessors, (73), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 12:02:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 496 transitions. [2021-05-02 12:02:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 12:02:27,983 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:02:27,983 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:02:28,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 12:02:28,210 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:02:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:02:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1516193256, now seen corresponding path program 6 times [2021-05-02 12:02:28,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:02:28,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145219222] [2021-05-02 12:02:28,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:02:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:28,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:02:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 12:02:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:28,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 12:02:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:28,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-05-02 12:02:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-05-02 12:02:28,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:02:28,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145219222] [2021-05-02 12:02:28,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145219222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:02:28,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454836117] [2021-05-02 12:02:28,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:02:28,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 12:02:28,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:02:28,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 12:02:28,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:02:28,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:28,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:28,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:29,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:29,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:29,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:29,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:29,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-05-02 12:02:29,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454836117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:02:29,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:02:29,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-05-02 12:02:29,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320247632] [2021-05-02 12:02:29,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 12:02:29,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:02:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 12:02:29,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:02:29,163 INFO L87 Difference]: Start difference. First operand 425 states and 496 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 12:02:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:02:30,292 INFO L93 Difference]: Finished difference Result 564 states and 667 transitions. [2021-05-02 12:02:30,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:02:30,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 65 [2021-05-02 12:02:30,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:02:30,294 INFO L225 Difference]: With dead ends: 564 [2021-05-02 12:02:30,294 INFO L226 Difference]: Without dead ends: 510 [2021-05-02 12:02:30,295 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 713.3ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:02:30,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-05-02 12:02:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 380. [2021-05-02 12:02:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 363 states have (on average 1.1763085399449036) internal successors, (427), 367 states have internal predecessors, (427), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 12:02:30,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 447 transitions. [2021-05-02 12:02:30,357 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 447 transitions. Word has length 65 [2021-05-02 12:02:30,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:02:30,357 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 447 transitions. [2021-05-02 12:02:30,357 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 12:02:30,357 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 447 transitions. [2021-05-02 12:02:30,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 12:02:30,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:02:30,359 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:02:30,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:02:30,565 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:02:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:02:30,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1181046921, now seen corresponding path program 1 times [2021-05-02 12:02:30,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:02:30,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094410490] [2021-05-02 12:02:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:02:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:31,194 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2021-05-02 12:02:33,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:02:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:33,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-05-02 12:02:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 8 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:02:33,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:02:33,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094410490] [2021-05-02 12:02:33,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094410490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:02:33,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011163895] [2021-05-02 12:02:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:02:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:02:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 12:02:33,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:02:33,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:33,524 INFO L388 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 28 treesize of output 27 [2021-05-02 12:02:33,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:02:33,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:02:33,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 12:02:33,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2021-05-02 12:02:33,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:33,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:33,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:33,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:33,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:02:33,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-05-02 12:02:33,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:02:33,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:02:33,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:02:33,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:20 [2021-05-02 12:02:34,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 12:02:34,159 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 12:02:34,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-05-02 12:02:34,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:02:34,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:02:34,181 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:02:34,182 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-05-02 12:02:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 12:02:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:34,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 12:02:34,697 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 12:02:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 55 [2021-05-02 12:02:34,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:02:34,733 INFO L628 ElimStorePlain]: treesize reduction 18, result has 70.5 percent of original size [2021-05-02 12:02:34,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,737 INFO L550 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. [2021-05-02 12:02:34,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:62, output treesize:43 [2021-05-02 12:02:34,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:34,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:35,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:35,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:35,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 12:02:35,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 12:02:35,481 INFO L354 Elim1Store]: treesize reduction 66, result has 23.3 percent of original size [2021-05-02 12:02:35,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 59 [2021-05-02 12:02:35,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:02:35,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:02:35,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 12:02:35,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:62 [2021-05-02 12:02:35,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:35,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:02:48,512 INFO L388 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 26 treesize of output 10 [2021-05-02 12:02:48,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 12:02:48,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 12:02:48,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 12:02:48,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 12:02:48,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:02:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 12:02:48,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011163895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:02:48,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:02:48,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30] total 52 [2021-05-02 12:02:48,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654653432] [2021-05-02 12:02:48,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 12:02:48,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:02:48,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 12:02:48,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=2372, Unknown=2, NotChecked=0, Total=2652 [2021-05-02 12:02:48,631 INFO L87 Difference]: Start difference. First operand 380 states and 447 transitions. Second operand has 52 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 48 states have internal predecessors, (97), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 12:03:22,319 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-05-02 12:03:59,291 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-05-02 12:04:03,889 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-05-02 12:04:08,721 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48