/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/nla-digbench-scaling/ps4-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:54:54,082 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:54:54,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:54:54,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 16:54:54,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:54:54,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:54:54,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:54:54,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:54:54,121 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:54:54,122 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:54:54,124 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:54:54,125 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:54:54,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:54:54,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:54:54,130 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:54:54,131 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:54:54,133 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:54:54,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:54:54,140 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:54:54,141 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:54:54,147 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 16:54:54,186 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:54:54,186 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:54:54,187 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:54:54,188 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:54:54,188 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:54:54,188 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:54:54,188 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:54:54,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:54:54,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:54:54,189 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:54:54,189 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:54:54,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:54:54,189 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:54:54,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:54:54,189 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:54:54,190 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:54:54,190 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:54:54,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:54:54,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:54:54,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:54:54,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:54:54,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:54:54,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:54:54,191 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:54:54,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:54:54,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:54:54,191 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:54:54,192 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:54:54,192 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:54:54,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:54:54,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:54:54,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:54:54,559 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:54:54,559 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:54:54,560 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-05-02 16:54:54,633 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03ff6ca0/6dbda45e9d6c44a1b3e38c2d7a906dcf/FLAGd5b7f7d98 [2021-05-02 16:54:55,085 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:54:55,086 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c [2021-05-02 16:54:55,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03ff6ca0/6dbda45e9d6c44a1b3e38c2d7a906dcf/FLAGd5b7f7d98 [2021-05-02 16:54:55,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f03ff6ca0/6dbda45e9d6c44a1b3e38c2d7a906dcf [2021-05-02 16:54:55,490 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:54:55,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:54:55,493 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:54:55,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:54:55,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:54:55,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@342fa81c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55, skipping insertion in model container [2021-05-02 16:54:55,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:54:55,518 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:54:55,615 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-05-02 16:54:55,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:54:55,639 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:54:55,649 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound50.c[458,471] [2021-05-02 16:54:55,654 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:54:55,666 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:54:55,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55 WrapperNode [2021-05-02 16:54:55,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:54:55,668 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:54:55,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:54:55,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:54:55,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,697 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,715 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,719 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,720 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (1/1) ... [2021-05-02 16:54:55,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:54:55,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:54:55,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:54:55,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:54:55,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (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 16:54:55,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:54:55,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:54:55,806 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:54:55,807 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:54:55,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:54:55,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:54:55,807 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:54:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:54:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:54:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:54:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 16:54:55,808 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:54:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:54:55,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:54:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:54:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:54:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:54:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:54:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:54:55,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:54:56,095 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:54:56,095 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:54:56,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:54:56 BoogieIcfgContainer [2021-05-02 16:54:56,097 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:54:56,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:54:56,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:54:56,111 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:54:56,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:54:55" (1/3) ... [2021-05-02 16:54:56,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bac1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:54:56, skipping insertion in model container [2021-05-02 16:54:56,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:54:55" (2/3) ... [2021-05-02 16:54:56,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51bac1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:54:56, skipping insertion in model container [2021-05-02 16:54:56,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:54:56" (3/3) ... [2021-05-02 16:54:56,114 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound50.c [2021-05-02 16:54:56,119 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:54:56,123 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:54:56,137 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:54:56,155 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:54:56,155 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:54:56,156 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:54:56,156 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:54:56,156 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:54:56,156 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:54:56,156 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:54:56,156 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:54:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:54:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 16:54:56,172 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:56,173 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:56,173 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:56,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:56,178 INFO L82 PathProgramCache]: Analyzing trace with hash -2133548928, now seen corresponding path program 1 times [2021-05-02 16:54:56,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:56,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022442652] [2021-05-02 16:54:56,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:56,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:54:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:56,382 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 16:54:56,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:56,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022442652] [2021-05-02 16:54:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022442652] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:54:56,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:54:56,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:54:56,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590828109] [2021-05-02 16:54:56,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:54:56,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:56,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:54:56,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:54:56,400 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 16:54:56,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:56,475 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-02 16:54:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:54:56,477 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2021-05-02 16:54:56,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:56,483 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:54:56,483 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 16:54:56,486 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:54:56,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 16:54:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 16:54:56,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:54:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-05-02 16:54:56,515 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2021-05-02 16:54:56,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:56,516 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-05-02 16:54:56,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 16:54:56,516 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-05-02 16:54:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:54:56,517 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:56,517 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:56,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:54:56,517 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:56,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:56,518 INFO L82 PathProgramCache]: Analyzing trace with hash -2118701623, now seen corresponding path program 1 times [2021-05-02 16:54:56,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:56,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728674223] [2021-05-02 16:54:56,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:56,545 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:56,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260400585] [2021-05-02 16:54:56,546 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 16:54:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:56,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:54:56,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:56,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:56,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:56,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:56,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:56,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:56,696 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 16:54:56,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:56,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728674223] [2021-05-02 16:54:56,697 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:56,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260400585] [2021-05-02 16:54:56,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260400585] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:54:56,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:54:56,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:54:56,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965034441] [2021-05-02 16:54:56,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:54:56,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:56,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:54:56,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:54:56,700 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:54:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:56,726 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-05-02 16:54:56,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:54:56,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 12 [2021-05-02 16:54:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:56,728 INFO L225 Difference]: With dead ends: 28 [2021-05-02 16:54:56,729 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 16:54:56,729 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:54:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 16:54:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 16:54:56,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:54:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-05-02 16:54:56,735 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 12 [2021-05-02 16:54:56,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:56,735 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-05-02 16:54:56,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 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 16:54:56,735 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-05-02 16:54:56,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 16:54:56,736 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:56,736 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:56,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:54:56,961 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:56,962 INFO L82 PathProgramCache]: Analyzing trace with hash -2116914163, now seen corresponding path program 1 times [2021-05-02 16:54:56,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:56,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211542996] [2021-05-02 16:54:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:56,976 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:56,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723530927] [2021-05-02 16:54:56,976 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 16:54:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:57,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 16:54:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:57,097 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 16:54:57,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:57,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211542996] [2021-05-02 16:54:57,097 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:57,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723530927] [2021-05-02 16:54:57,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723530927] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:54:57,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:54:57,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 16:54:57,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716829352] [2021-05-02 16:54:57,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:54:57,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:57,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:54:57,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:54:57,100 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 16:54:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:57,134 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-05-02 16:54:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 16:54:57,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 12 [2021-05-02 16:54:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:57,135 INFO L225 Difference]: With dead ends: 30 [2021-05-02 16:54:57,135 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:54:57,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:54:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:54:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 16:54:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:54:57,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 16:54:57,144 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 12 [2021-05-02 16:54:57,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:57,144 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 16:54:57,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 16:54:57,145 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 16:54:57,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:54:57,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:57,145 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:57,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:57,365 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:57,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:57,366 INFO L82 PathProgramCache]: Analyzing trace with hash -263585780, now seen corresponding path program 1 times [2021-05-02 16:54:57,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:57,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768583058] [2021-05-02 16:54:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:57,378 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:57,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433849872] [2021-05-02 16:54:57,379 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 16:54:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:57,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:54:57,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:57,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:57,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:57,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:57,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:57,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:57,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:57,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:57,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:54:57,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:57,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:57,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768583058] [2021-05-02 16:54:57,516 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:57,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433849872] [2021-05-02 16:54:57,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433849872] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:57,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:57,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:54:57,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657031157] [2021-05-02 16:54:57,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:54:57,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:57,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:54:57,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:54:57,518 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:54:57,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:54:57,564 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 16:54:57,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:54:57,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:54:57,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:54:57,566 INFO L225 Difference]: With dead ends: 36 [2021-05-02 16:54:57,566 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 16:54:57,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:54:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 16:54:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 16:54:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:54:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-05-02 16:54:57,575 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 20 [2021-05-02 16:54:57,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:54:57,575 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-05-02 16:54:57,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:54:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-05-02 16:54:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 16:54:57,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:54:57,576 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:54:57,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:54:57,777 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:54:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:54:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash -261798320, now seen corresponding path program 1 times [2021-05-02 16:54:57,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:54:57,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267330684] [2021-05-02 16:54:57,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:54:57,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:54:57,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1936642314] [2021-05-02 16:54:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 16:54:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:54:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:54:57,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:54:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:54:57,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:54:57,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267330684] [2021-05-02 16:54:57,997 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:54:57,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936642314] [2021-05-02 16:54:57,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936642314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:54:57,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:54:57,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:54:57,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358260446] [2021-05-02 16:54:57,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:54:57,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:54:57,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:54:58,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:54:58,000 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:58:17,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:17,350 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-02 16:58:17,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:58:17,350 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 16:58:17,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:17,351 INFO L225 Difference]: With dead ends: 38 [2021-05-02 16:58:17,351 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:58:17,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:58:17,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:58:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 16:58:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-05-02 16:58:17,359 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 20 [2021-05-02 16:58:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:17,359 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-05-02 16:58:17,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 16:58:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-05-02 16:58:17,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 16:58:17,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:17,360 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:17,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:17,577 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:17,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:17,577 INFO L82 PathProgramCache]: Analyzing trace with hash 891414954, now seen corresponding path program 1 times [2021-05-02 16:58:17,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:17,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330051264] [2021-05-02 16:58:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:17,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:17,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1192882478] [2021-05-02 16:58:17,587 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 16:58:17,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:17,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 16:58:17,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:17,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:58:17,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:17,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330051264] [2021-05-02 16:58:17,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:17,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192882478] [2021-05-02 16:58:17,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192882478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:17,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:17,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:58:17,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817400907] [2021-05-02 16:58:17,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:58:17,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:17,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:58:17,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:58:17,803 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:17,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:17,949 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-05-02 16:58:17,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:58:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 16:58:17,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:17,950 INFO L225 Difference]: With dead ends: 41 [2021-05-02 16:58:17,950 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:58:17,954 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:58:17,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:58:17,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 16:58:17,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:17,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 16:58:17,967 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 16:58:17,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:17,967 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 16:58:17,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:17,968 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 16:58:17,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:58:17,969 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:17,969 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:18,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:58:18,185 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:18,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:18,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1647059121, now seen corresponding path program 2 times [2021-05-02 16:58:18,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:18,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36998856] [2021-05-02 16:58:18,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:18,195 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:18,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017796553] [2021-05-02 16:58:18,195 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 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 16:58:18,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:18,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:18,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:58:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:18,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:18,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:18,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36998856] [2021-05-02 16:58:18,405 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:18,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017796553] [2021-05-02 16:58:18,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017796553] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:18,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:18,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:58:18,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712559711] [2021-05-02 16:58:18,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:58:18,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:18,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:58:18,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:58:18,407 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:18,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:18,463 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-05-02 16:58:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:58:18,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:58:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:18,464 INFO L225 Difference]: With dead ends: 44 [2021-05-02 16:58:18,464 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 16:58:18,465 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:58:18,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 16:58:18,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 16:58:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-05-02 16:58:18,471 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 28 [2021-05-02 16:58:18,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:18,471 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-05-02 16:58:18,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:18,471 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-05-02 16:58:18,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 16:58:18,472 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:18,472 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:18,684 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:18,685 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:18,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:18,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1645271661, now seen corresponding path program 2 times [2021-05-02 16:58:18,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:18,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572569267] [2021-05-02 16:58:18,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:18,698 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:18,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1675527223] [2021-05-02 16:58:18,698 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 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 16:58:18,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:18,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:18,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 16:58:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:18,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:58:18,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:18,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572569267] [2021-05-02 16:58:18,962 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:18,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675527223] [2021-05-02 16:58:18,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675527223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:18,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:18,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:58:18,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160651015] [2021-05-02 16:58:18,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:58:18,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:18,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:58:18,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:58:18,964 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:19,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:19,088 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2021-05-02 16:58:19,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:58:19,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 28 [2021-05-02 16:58:19,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:19,089 INFO L225 Difference]: With dead ends: 46 [2021-05-02 16:58:19,089 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 16:58:19,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:58:19,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 16:58:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-02 16:58:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:19,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-05-02 16:58:19,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2021-05-02 16:58:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:19,096 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-05-02 16:58:19,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 16:58:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-05-02 16:58:19,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 16:58:19,097 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:19,097 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:19,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:19,317 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:19,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:19,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1036651181, now seen corresponding path program 2 times [2021-05-02 16:58:19,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:19,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65143977] [2021-05-02 16:58:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:19,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:19,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117980318] [2021-05-02 16:58:19,326 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 16:58:19,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:19,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:19,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 16:58:19,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:19,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 16:58:19,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:19,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65143977] [2021-05-02 16:58:19,585 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:19,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117980318] [2021-05-02 16:58:19,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117980318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:19,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:19,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:58:19,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687404583] [2021-05-02 16:58:19,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:58:19,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:58:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:58:19,586 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:58:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:19,697 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-05-02 16:58:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:58:19,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 16:58:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:19,699 INFO L225 Difference]: With dead ends: 49 [2021-05-02 16:58:19,699 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 16:58:19,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:58:19,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 16:58:19,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 16:58:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2021-05-02 16:58:19,705 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 34 [2021-05-02 16:58:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:19,705 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2021-05-02 16:58:19,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:58:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2021-05-02 16:58:19,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:58:19,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:19,706 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:19,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 16:58:19,919 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash 486001554, now seen corresponding path program 3 times [2021-05-02 16:58:19,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:19,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416919955] [2021-05-02 16:58:19,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:19,950 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:19,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23275175] [2021-05-02 16:58:19,950 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 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 16:58:19,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:58:19,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 16:58:20,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:20,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:20,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:20,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416919955] [2021-05-02 16:58:20,128 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:20,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23275175] [2021-05-02 16:58:20,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23275175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:20,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:20,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:58:20,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341048543] [2021-05-02 16:58:20,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:58:20,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:20,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:58:20,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:58:20,130 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:58:20,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:20,266 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 16:58:20,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:58:20,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2021-05-02 16:58:20,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:20,267 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:58:20,267 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 16:58:20,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:58:20,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 16:58:20,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 16:58:20,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:20,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 16:58:20,273 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 36 [2021-05-02 16:58:20,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:20,274 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 16:58:20,274 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:58:20,274 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 16:58:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 16:58:20,275 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:20,275 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:20,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:20,485 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash 487789014, now seen corresponding path program 3 times [2021-05-02 16:58:20,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:20,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367087394] [2021-05-02 16:58:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:20,492 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:20,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921120477] [2021-05-02 16:58:20,493 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 16:58:20,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 16:58:20,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:20,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:58:20,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:20,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 16:58:20,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:20,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367087394] [2021-05-02 16:58:20,661 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:20,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921120477] [2021-05-02 16:58:20,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921120477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:20,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:20,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:58:20,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060222574] [2021-05-02 16:58:20,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:58:20,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:20,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:58:20,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:58:20,663 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:58:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:20,729 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 16:58:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 16:58:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2021-05-02 16:58:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:20,733 INFO L225 Difference]: With dead ends: 50 [2021-05-02 16:58:20,733 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 16:58:20,733 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:58:20,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 16:58:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-05-02 16:58:20,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:20,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-05-02 16:58:20,749 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 36 [2021-05-02 16:58:20,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:20,749 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-05-02 16:58:20,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 16:58:20,749 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-05-02 16:58:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 16:58:20,751 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:20,751 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:20,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:20,965 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:20,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1383171920, now seen corresponding path program 3 times [2021-05-02 16:58:20,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:20,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512196569] [2021-05-02 16:58:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:20,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:20,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [65245686] [2021-05-02 16:58:20,983 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 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 16:58:21,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:58:21,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:58:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:21,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,489 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 16:58:21,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:21,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512196569] [2021-05-02 16:58:21,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:21,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65245686] [2021-05-02 16:58:21,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65245686] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:21,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:21,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:58:21,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689525086] [2021-05-02 16:58:21,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:58:21,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:21,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:58:21,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:58:21,491 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:21,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:21,571 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-05-02 16:58:21,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 16:58:21,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2021-05-02 16:58:21,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:21,573 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:58:21,573 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:58:21,573 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:58:21,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:58:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:58:21,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-05-02 16:58:21,579 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2021-05-02 16:58:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:21,579 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-05-02 16:58:21,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-05-02 16:58:21,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 16:58:21,580 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:21,580 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:21,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 16:58:21,791 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1386691371, now seen corresponding path program 4 times [2021-05-02 16:58:21,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:21,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339874933] [2021-05-02 16:58:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:21,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:21,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571857403] [2021-05-02 16:58:21,796 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 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 16:58:21,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:21,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:21,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 16:58:21,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:21,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:21,989 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:21,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339874933] [2021-05-02 16:58:21,989 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:21,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571857403] [2021-05-02 16:58:21,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571857403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:21,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:21,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:58:21,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315700880] [2021-05-02 16:58:21,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:58:21,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:21,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:58:21,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:58:21,991 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:22,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:22,077 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-05-02 16:58:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:58:22,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 44 [2021-05-02 16:58:22,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:22,078 INFO L225 Difference]: With dead ends: 58 [2021-05-02 16:58:22,078 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 16:58:22,079 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:58:22,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 16:58:22,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-05-02 16:58:22,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-05-02 16:58:22,085 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 44 [2021-05-02 16:58:22,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:22,085 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-05-02 16:58:22,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:58:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-05-02 16:58:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 16:58:22,086 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:22,086 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:22,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 16:58:22,301 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1037185971, now seen corresponding path program 4 times [2021-05-02 16:58:22,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:22,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527067810] [2021-05-02 16:58:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:22,307 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:22,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068192869] [2021-05-02 16:58:22,308 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 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 16:58:22,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:22,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:22,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:58:22,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:22,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 53 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 16:58:22,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:22,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527067810] [2021-05-02 16:58:22,620 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:22,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068192869] [2021-05-02 16:58:22,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068192869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:22,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:22,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:58:22,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332307432] [2021-05-02 16:58:22,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:58:22,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:22,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:58:22,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:58:22,622 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:22,778 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-05-02 16:58:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:58:22,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2021-05-02 16:58:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:22,779 INFO L225 Difference]: With dead ends: 60 [2021-05-02 16:58:22,779 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 16:58:22,780 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:58:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 16:58:22,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-02 16:58:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2021-05-02 16:58:22,785 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 50 [2021-05-02 16:58:22,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:22,786 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2021-05-02 16:58:22,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:22,786 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2021-05-02 16:58:22,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 16:58:22,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:22,787 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:23,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 16:58:23,001 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash 999934744, now seen corresponding path program 5 times [2021-05-02 16:58:23,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:23,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191767666] [2021-05-02 16:58:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:23,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:23,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [927380924] [2021-05-02 16:58:23,007 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 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 16:58:23,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:58:23,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:23,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:58:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:23,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:23,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191767666] [2021-05-02 16:58:23,243 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:23,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927380924] [2021-05-02 16:58:23,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927380924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:23,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:23,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:58:23,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359060164] [2021-05-02 16:58:23,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:58:23,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:23,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:58:23,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:58:23,245 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:23,342 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-05-02 16:58:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:58:23,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 52 [2021-05-02 16:58:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:23,343 INFO L225 Difference]: With dead ends: 66 [2021-05-02 16:58:23,343 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 16:58:23,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:58:23,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 16:58:23,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-05-02 16:58:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-05-02 16:58:23,349 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 52 [2021-05-02 16:58:23,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:23,349 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-05-02 16:58:23,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 8 states have call successors, (8), 8 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:58:23,349 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-05-02 16:58:23,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 16:58:23,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:23,350 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:23,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:23,569 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1795671114, now seen corresponding path program 5 times [2021-05-02 16:58:23,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:23,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72956781] [2021-05-02 16:58:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:23,575 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:23,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155943080] [2021-05-02 16:58:23,575 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 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 16:58:23,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:58:23,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:23,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:58:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:23,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:23,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:29,936 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 1) (= (mod (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 2 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0)) 4) 0) (= c_main_~y~0 1) (< c_main_~c~0 (+ c_main_~k~0 1))) is different from true [2021-05-02 16:58:29,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:29,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:29,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:29,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 14 proven. 68 refuted. 0 times theorem prover too weak. 45 trivial. 5 not checked. [2021-05-02 16:58:30,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:30,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72956781] [2021-05-02 16:58:30,142 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:30,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155943080] [2021-05-02 16:58:30,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155943080] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:30,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:30,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:58:30,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513946336] [2021-05-02 16:58:30,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:58:30,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:30,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:58:30,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=133, Unknown=1, NotChecked=22, Total=182 [2021-05-02 16:58:30,144 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:30,318 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-05-02 16:58:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:58:30,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 58 [2021-05-02 16:58:30,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:30,323 INFO L225 Difference]: With dead ends: 68 [2021-05-02 16:58:30,323 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 16:58:30,324 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 6369.9ms TimeCoverageRelationStatistics Valid=41, Invalid=202, Unknown=1, NotChecked=28, Total=272 [2021-05-02 16:58:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 16:58:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-05-02 16:58:30,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-05-02 16:58:30,335 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2021-05-02 16:58:30,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:30,336 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-05-02 16:58:30,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 8 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:30,336 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-05-02 16:58:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 16:58:30,337 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:30,337 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:30,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:30,561 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:30,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1633541723, now seen corresponding path program 6 times [2021-05-02 16:58:30,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:30,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975395013] [2021-05-02 16:58:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:30,567 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:30,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661000155] [2021-05-02 16:58:30,567 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 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 16:58:30,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:58:30,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:58:30,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:30,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:30,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:30,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975395013] [2021-05-02 16:58:30,970 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:30,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661000155] [2021-05-02 16:58:30,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661000155] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:30,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:30,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:58:30,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960546730] [2021-05-02 16:58:30,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:58:30,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:30,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:58:30,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:58:30,977 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:31,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:31,089 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-05-02 16:58:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:58:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 60 [2021-05-02 16:58:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:31,091 INFO L225 Difference]: With dead ends: 74 [2021-05-02 16:58:31,091 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 16:58:31,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:58:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 16:58:31,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-05-02 16:58:31,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:31,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2021-05-02 16:58:31,099 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2021-05-02 16:58:31,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:31,099 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2021-05-02 16:58:31,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 9 states have call successors, (9), 9 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:58:31,099 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2021-05-02 16:58:31,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 16:58:31,100 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:31,100 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:31,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:31,307 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:31,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1180930233, now seen corresponding path program 6 times [2021-05-02 16:58:31,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:31,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801803863] [2021-05-02 16:58:31,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:31,321 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:31,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711683056] [2021-05-02 16:58:31,321 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 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 16:58:31,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:58:31,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:31,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 16:58:31,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:31,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:31,931 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 22 proven. 94 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 16:58:31,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:31,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801803863] [2021-05-02 16:58:31,932 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:31,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711683056] [2021-05-02 16:58:31,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711683056] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:31,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:31,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:58:31,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847278789] [2021-05-02 16:58:31,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:58:31,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:31,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:58:31,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:58:31,935 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:32,129 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-05-02 16:58:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:58:32,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 66 [2021-05-02 16:58:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:32,130 INFO L225 Difference]: With dead ends: 76 [2021-05-02 16:58:32,130 INFO L226 Difference]: Without dead ends: 71 [2021-05-02 16:58:32,130 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 231.8ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-02 16:58:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-05-02 16:58:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-05-02 16:58:32,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-05-02 16:58:32,139 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-05-02 16:58:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:32,140 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-05-02 16:58:32,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-05-02 16:58:32,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 16:58:32,141 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:32,141 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:32,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 16:58:32,342 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:32,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1699217054, now seen corresponding path program 7 times [2021-05-02 16:58:32,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:32,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995344151] [2021-05-02 16:58:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:32,348 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:32,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140061836] [2021-05-02 16:58:32,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 16:58:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:32,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:58:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:32,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:32,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:32,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995344151] [2021-05-02 16:58:32,591 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:32,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140061836] [2021-05-02 16:58:32,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140061836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:32,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:32,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:58:32,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386572109] [2021-05-02 16:58:32,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:58:32,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:32,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:58:32,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:58:32,594 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:32,745 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2021-05-02 16:58:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:58:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 68 [2021-05-02 16:58:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:32,746 INFO L225 Difference]: With dead ends: 82 [2021-05-02 16:58:32,746 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 16:58:32,747 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:58:32,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 16:58:32,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 16:58:32,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:32,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2021-05-02 16:58:32,752 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 68 [2021-05-02 16:58:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:32,753 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2021-05-02 16:58:32,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 10 states have call successors, (10), 10 states have call predecessors, (10), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:58:32,753 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2021-05-02 16:58:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 16:58:32,753 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:32,753 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:32,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 16:58:32,954 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash -763940164, now seen corresponding path program 7 times [2021-05-02 16:58:32,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:32,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874908078] [2021-05-02 16:58:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:32,959 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:32,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1859556069] [2021-05-02 16:58:32,959 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 16:58:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:33,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 16:58:33,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:33,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 15 proven. 134 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 16:58:33,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:33,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874908078] [2021-05-02 16:58:33,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:33,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859556069] [2021-05-02 16:58:33,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859556069] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:33,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:33,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 16:58:33,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955392256] [2021-05-02 16:58:33,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 16:58:33,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:33,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 16:58:33,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:58:33,788 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:33,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:33,993 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2021-05-02 16:58:33,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 16:58:33,993 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 74 [2021-05-02 16:58:33,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:33,994 INFO L225 Difference]: With dead ends: 84 [2021-05-02 16:58:33,994 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 16:58:33,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:58:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 16:58:34,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-05-02 16:58:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-05-02 16:58:34,003 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 74 [2021-05-02 16:58:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:34,003 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-05-02 16:58:34,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 10 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-05-02 16:58:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 16:58:34,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:34,004 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:34,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 16:58:34,209 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:34,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:34,209 INFO L82 PathProgramCache]: Analyzing trace with hash 989539297, now seen corresponding path program 8 times [2021-05-02 16:58:34,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:34,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554305326] [2021-05-02 16:58:34,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:34,214 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:34,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247652304] [2021-05-02 16:58:34,214 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 16:58:34,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:34,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:34,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:58:34,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:34,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:34,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:34,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554305326] [2021-05-02 16:58:34,445 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:34,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247652304] [2021-05-02 16:58:34,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247652304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:34,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:34,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:58:34,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939546162] [2021-05-02 16:58:34,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:58:34,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:34,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:58:34,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:58:34,446 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:34,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:34,610 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2021-05-02 16:58:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:58:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 76 [2021-05-02 16:58:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:34,611 INFO L225 Difference]: With dead ends: 90 [2021-05-02 16:58:34,611 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 16:58:34,611 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 125.0ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:58:34,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 16:58:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-05-02 16:58:34,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-05-02 16:58:34,617 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 76 [2021-05-02 16:58:34,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:34,618 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-05-02 16:58:34,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 11 states have call successors, (11), 11 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:58:34,618 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-05-02 16:58:34,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 16:58:34,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:34,619 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:34,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 16:58:34,844 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:34,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1500110401, now seen corresponding path program 8 times [2021-05-02 16:58:34,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:34,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214112737] [2021-05-02 16:58:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:34,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:34,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830295754] [2021-05-02 16:58:34,850 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 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 16:58:35,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:35,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:35,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 16:58:35,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:35,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 17 proven. 169 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-02 16:58:35,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:35,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214112737] [2021-05-02 16:58:35,607 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:35,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830295754] [2021-05-02 16:58:35,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830295754] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:35,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:35,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 16:58:35,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270034371] [2021-05-02 16:58:35,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 16:58:35,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:35,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 16:58:35,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:58:35,608 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:35,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:35,847 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-05-02 16:58:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:58:35,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 82 [2021-05-02 16:58:35,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:35,849 INFO L225 Difference]: With dead ends: 92 [2021-05-02 16:58:35,849 INFO L226 Difference]: Without dead ends: 87 [2021-05-02 16:58:35,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 222.2ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:58:35,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-05-02 16:58:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-05-02 16:58:35,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:35,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2021-05-02 16:58:35,856 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 82 [2021-05-02 16:58:35,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:35,856 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2021-05-02 16:58:35,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:35,856 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2021-05-02 16:58:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 16:58:35,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:35,857 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:36,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 16:58:36,058 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:36,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:36,058 INFO L82 PathProgramCache]: Analyzing trace with hash -2095421916, now seen corresponding path program 9 times [2021-05-02 16:58:36,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:36,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120143839] [2021-05-02 16:58:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:36,063 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:36,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055753538] [2021-05-02 16:58:36,063 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 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 16:58:36,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:58:36,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:58:36,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:36,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:36,741 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:36,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120143839] [2021-05-02 16:58:36,742 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:36,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055753538] [2021-05-02 16:58:36,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055753538] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:36,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:36,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:58:36,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339201259] [2021-05-02 16:58:36,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:58:36,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:36,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:58:36,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:58:36,743 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:36,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:36,946 INFO L93 Difference]: Finished difference Result 98 states and 99 transitions. [2021-05-02 16:58:36,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 16:58:36,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 84 [2021-05-02 16:58:36,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:36,947 INFO L225 Difference]: With dead ends: 98 [2021-05-02 16:58:36,947 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 16:58:36,948 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:58:36,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 16:58:36,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-05-02 16:58:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:36,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2021-05-02 16:58:36,954 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 84 [2021-05-02 16:58:36,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:36,954 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2021-05-02 16:58:36,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 12 states have call successors, (12), 12 states have call predecessors, (12), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:58:36,954 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2021-05-02 16:58:36,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 16:58:36,955 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:36,955 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:37,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:37,156 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:37,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:37,156 INFO L82 PathProgramCache]: Analyzing trace with hash 488857026, now seen corresponding path program 9 times [2021-05-02 16:58:37,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:37,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576689645] [2021-05-02 16:58:37,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:37,160 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:37,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656069818] [2021-05-02 16:58:37,161 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 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 16:58:37,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:58:37,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:37,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 16:58:37,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:37,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:37,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 59 proven. 204 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2021-05-02 16:58:38,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:38,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576689645] [2021-05-02 16:58:38,159 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:38,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656069818] [2021-05-02 16:58:38,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656069818] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:38,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:38,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 16:58:38,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851319430] [2021-05-02 16:58:38,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 16:58:38,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:38,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 16:58:38,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=339, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:58:38,160 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:40,466 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2021-05-02 16:58:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:58:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 90 [2021-05-02 16:58:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:40,467 INFO L225 Difference]: With dead ends: 100 [2021-05-02 16:58:40,467 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 16:58:40,467 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-05-02 16:58:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 16:58:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-05-02 16:58:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-05-02 16:58:40,474 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 90 [2021-05-02 16:58:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:40,474 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-05-02 16:58:40,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 12 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-05-02 16:58:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 16:58:40,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:40,475 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:40,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 16:58:40,680 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:40,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1958171289, now seen corresponding path program 10 times [2021-05-02 16:58:40,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:40,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304804431] [2021-05-02 16:58:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:40,685 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:40,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079029134] [2021-05-02 16:58:40,685 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 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 16:58:41,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:41,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 16:58:41,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:41,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:41,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:41,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304804431] [2021-05-02 16:58:41,647 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:41,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079029134] [2021-05-02 16:58:41,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079029134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:41,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:41,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 16:58:41,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020907698] [2021-05-02 16:58:41,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 16:58:41,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:41,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 16:58:41,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:58:41,649 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:41,923 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2021-05-02 16:58:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 16:58:41,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 92 [2021-05-02 16:58:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:41,925 INFO L225 Difference]: With dead ends: 106 [2021-05-02 16:58:41,925 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:58:41,925 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:58:41,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:58:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 16:58:41,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 states have internal predecessors, (76), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2021-05-02 16:58:41,931 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 92 [2021-05-02 16:58:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:41,932 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2021-05-02 16:58:41,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 13 states have call successors, (13), 13 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:58:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2021-05-02 16:58:41,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 16:58:41,933 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:41,933 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:42,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:42,138 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:42,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:42,138 INFO L82 PathProgramCache]: Analyzing trace with hash 2105665221, now seen corresponding path program 10 times [2021-05-02 16:58:42,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:42,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859966353] [2021-05-02 16:58:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:42,142 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:42,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631587799] [2021-05-02 16:58:42,143 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 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 16:58:42,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:58:42,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:42,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 56 conjunts are in the unsatisfiable core [2021-05-02 16:58:42,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:42,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:42,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:42,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:42,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:42,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:42,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:42,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:42,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:42,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 21 proven. 251 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 16:58:43,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:43,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859966353] [2021-05-02 16:58:43,028 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:43,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631587799] [2021-05-02 16:58:43,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631587799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:43,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:43,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 16:58:43,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865218116] [2021-05-02 16:58:43,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 16:58:43,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:43,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 16:58:43,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:58:43,029 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:43,390 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2021-05-02 16:58:43,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:58:43,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 98 [2021-05-02 16:58:43,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:43,393 INFO L225 Difference]: With dead ends: 108 [2021-05-02 16:58:43,393 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 16:58:43,394 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 208.6ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:58:43,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 16:58:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 16:58:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2021-05-02 16:58:43,408 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 98 [2021-05-02 16:58:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:43,409 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2021-05-02 16:58:43,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 13 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2021-05-02 16:58:43,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 16:58:43,411 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:43,411 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:43,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 16:58:43,616 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:43,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1311310250, now seen corresponding path program 11 times [2021-05-02 16:58:43,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:43,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997277657] [2021-05-02 16:58:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:43,621 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:43,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32399750] [2021-05-02 16:58:43,621 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 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 16:58:44,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 16:58:44,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:44,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 16:58:44,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:44,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:45,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:45,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997277657] [2021-05-02 16:58:45,099 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:45,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32399750] [2021-05-02 16:58:45,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32399750] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:45,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:45,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 16:58:45,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947928525] [2021-05-02 16:58:45,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 16:58:45,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:45,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 16:58:45,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 16:58:45,100 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:45,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:45,365 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2021-05-02 16:58:45,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 16:58:45,366 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 100 [2021-05-02 16:58:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:45,367 INFO L225 Difference]: With dead ends: 114 [2021-05-02 16:58:45,367 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 16:58:45,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 216.3ms TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2021-05-02 16:58:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 16:58:45,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-02 16:58:45,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:45,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2021-05-02 16:58:45,373 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 100 [2021-05-02 16:58:45,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:45,374 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2021-05-02 16:58:45,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 14 states have call successors, (14), 14 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:58:45,374 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2021-05-02 16:58:45,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 16:58:45,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:45,374 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:45,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 16:58:45,575 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:45,575 INFO L82 PathProgramCache]: Analyzing trace with hash -65749816, now seen corresponding path program 11 times [2021-05-02 16:58:45,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:45,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85473475] [2021-05-02 16:58:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:45,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:45,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1714768245] [2021-05-02 16:58:45,581 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 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 16:58:46,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 16:58:46,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:46,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 16:58:46,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:46,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 26 proven. 295 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 16:58:46,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:46,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85473475] [2021-05-02 16:58:46,800 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:46,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714768245] [2021-05-02 16:58:46,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714768245] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:46,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:46,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 16:58:46,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127161637] [2021-05-02 16:58:46,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 16:58:46,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 16:58:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:58:46,801 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:47,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:47,199 INFO L93 Difference]: Finished difference Result 116 states and 118 transitions. [2021-05-02 16:58:47,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 16:58:47,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 106 [2021-05-02 16:58:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:47,201 INFO L225 Difference]: With dead ends: 116 [2021-05-02 16:58:47,201 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 16:58:47,202 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 242.6ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:58:47,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 16:58:47,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 16:58:47,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-05-02 16:58:47,210 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 106 [2021-05-02 16:58:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:47,210 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-05-02 16:58:47,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 14 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-05-02 16:58:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 16:58:47,211 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:47,211 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:47,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 16:58:47,415 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:47,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:47,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1935565549, now seen corresponding path program 12 times [2021-05-02 16:58:47,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:47,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132932258] [2021-05-02 16:58:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:47,422 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:47,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1354628243] [2021-05-02 16:58:47,422 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 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 16:58:47,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 16:58:47,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:47,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 16:58:47,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:47,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:47,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:47,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132932258] [2021-05-02 16:58:47,914 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:47,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354628243] [2021-05-02 16:58:47,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354628243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:47,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:47,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 16:58:47,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328155700] [2021-05-02 16:58:47,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 16:58:47,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:47,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 16:58:47,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:58:47,915 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:48,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:48,147 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2021-05-02 16:58:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 16:58:48,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 108 [2021-05-02 16:58:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:48,148 INFO L225 Difference]: With dead ends: 122 [2021-05-02 16:58:48,148 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 16:58:48,149 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:58:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 16:58:48,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-05-02 16:58:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 states have internal predecessors, (88), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:48,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2021-05-02 16:58:48,156 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 108 [2021-05-02 16:58:48,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:48,156 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2021-05-02 16:58:48,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 15 states have internal predecessors, (80), 15 states have call successors, (15), 15 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:58:48,156 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2021-05-02 16:58:48,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 16:58:48,157 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:48,157 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:48,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 16:58:48,361 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:48,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1170284597, now seen corresponding path program 12 times [2021-05-02 16:58:48,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:48,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859299962] [2021-05-02 16:58:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:48,369 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:48,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [788161722] [2021-05-02 16:58:48,369 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 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 16:58:48,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 16:58:48,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:48,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 16:58:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:50,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:50,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 25 proven. 349 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-05-02 16:58:51,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:51,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859299962] [2021-05-02 16:58:51,153 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:51,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788161722] [2021-05-02 16:58:51,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788161722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:51,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:51,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:58:51,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513164347] [2021-05-02 16:58:51,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:58:51,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:51,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:58:51,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=378, Unknown=1, NotChecked=0, Total=420 [2021-05-02 16:58:51,154 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:51,552 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2021-05-02 16:58:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:58:51,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 114 [2021-05-02 16:58:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:51,553 INFO L225 Difference]: With dead ends: 124 [2021-05-02 16:58:51,553 INFO L226 Difference]: Without dead ends: 119 [2021-05-02 16:58:51,554 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2302.5ms TimeCoverageRelationStatistics Valid=56, Invalid=495, Unknown=1, NotChecked=0, Total=552 [2021-05-02 16:58:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-05-02 16:58:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-05-02 16:58:51,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:51,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-05-02 16:58:51,560 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-05-02 16:58:51,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:51,561 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-05-02 16:58:51,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.55) internal successors, (51), 19 states have internal predecessors, (51), 15 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:51,561 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-05-02 16:58:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 16:58:51,561 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:51,561 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:51,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 16:58:51,769 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:51,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:51,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1334563120, now seen corresponding path program 13 times [2021-05-02 16:58:51,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:51,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261133457] [2021-05-02 16:58:51,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:51,779 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:51,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1707637451] [2021-05-02 16:58:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 16:58:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 16:58:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:51,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:51,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:52,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:52,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261133457] [2021-05-02 16:58:52,195 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:52,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707637451] [2021-05-02 16:58:52,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707637451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:52,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:52,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 16:58:52,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720260292] [2021-05-02 16:58:52,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 16:58:52,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:52,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 16:58:52,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 16:58:52,196 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:52,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:52,440 INFO L93 Difference]: Finished difference Result 130 states and 131 transitions. [2021-05-02 16:58:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 16:58:52,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 116 [2021-05-02 16:58:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:52,442 INFO L225 Difference]: With dead ends: 130 [2021-05-02 16:58:52,442 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 16:58:52,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:58:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 16:58:52,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-05-02 16:58:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2021-05-02 16:58:52,449 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 116 [2021-05-02 16:58:52,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:52,450 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2021-05-02 16:58:52,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.0588235294117645) internal successors, (86), 16 states have internal predecessors, (86), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 16:58:52,450 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2021-05-02 16:58:52,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 16:58:52,451 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:52,451 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:52,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:52,657 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:52,657 INFO L82 PathProgramCache]: Analyzing trace with hash -966570034, now seen corresponding path program 13 times [2021-05-02 16:58:52,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:52,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563331688] [2021-05-02 16:58:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:52,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:52,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608002235] [2021-05-02 16:58:52,662 INFO L93 rtionOrderModulation]: Changing assertion order to 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 16:58:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:58:53,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 16:58:53,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:53,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 27 proven. 404 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-05-02 16:58:53,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563331688] [2021-05-02 16:58:53,835 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:53,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608002235] [2021-05-02 16:58:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608002235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:53,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:53,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:58:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338665909] [2021-05-02 16:58:53,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:58:53,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:58:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:58:53,836 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:54,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:54,219 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2021-05-02 16:58:54,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 16:58:54,219 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 122 [2021-05-02 16:58:54,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:54,220 INFO L225 Difference]: With dead ends: 132 [2021-05-02 16:58:54,220 INFO L226 Difference]: Without dead ends: 127 [2021-05-02 16:58:54,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:58:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-05-02 16:58:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-05-02 16:58:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:58:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-05-02 16:58:54,239 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 122 [2021-05-02 16:58:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:54,240 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-05-02 16:58:54,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 16 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:54,240 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-05-02 16:58:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 16:58:54,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:54,241 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:54,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 16:58:54,445 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:54,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:54,446 INFO L82 PathProgramCache]: Analyzing trace with hash -464237453, now seen corresponding path program 14 times [2021-05-02 16:58:54,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:54,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304087498] [2021-05-02 16:58:54,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:54,452 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:54,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119181379] [2021-05-02 16:58:54,453 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:54,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:54,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:54,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 16:58:54,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:54,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:54,847 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:54,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:54,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304087498] [2021-05-02 16:58:54,847 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:54,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119181379] [2021-05-02 16:58:54,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119181379] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:54,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:54,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 16:58:54,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026314114] [2021-05-02 16:58:54,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 16:58:54,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:54,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 16:58:54,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:58:54,849 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:55,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:55,231 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2021-05-02 16:58:55,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 16:58:55,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 124 [2021-05-02 16:58:55,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:55,232 INFO L225 Difference]: With dead ends: 138 [2021-05-02 16:58:55,232 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 16:58:55,232 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 280.5ms TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2021-05-02 16:58:55,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 16:58:55,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-05-02 16:58:55,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 states have internal predecessors, (100), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:58:55,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2021-05-02 16:58:55,239 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 124 [2021-05-02 16:58:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:55,239 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2021-05-02 16:58:55,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 17 states have internal predecessors, (92), 17 states have call successors, (17), 17 states have call predecessors, (17), 15 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 16:58:55,239 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2021-05-02 16:58:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 16:58:55,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:55,240 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:55,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 16:58:55,453 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash 467995857, now seen corresponding path program 14 times [2021-05-02 16:58:55,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:55,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370058537] [2021-05-02 16:58:55,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:55,457 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:55,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2088107622] [2021-05-02 16:58:55,458 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:56,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:58:56,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:56,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 16:58:56,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:56,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 29 proven. 463 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-02 16:58:56,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370058537] [2021-05-02 16:58:56,730 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:56,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088107622] [2021-05-02 16:58:56,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088107622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:56,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:56,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 16:58:56,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433932814] [2021-05-02 16:58:56,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 16:58:56,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:56,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 16:58:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:58:56,732 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:58:57,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:57,155 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2021-05-02 16:58:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 16:58:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 130 [2021-05-02 16:58:57,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:57,157 INFO L225 Difference]: With dead ends: 140 [2021-05-02 16:58:57,157 INFO L226 Difference]: Without dead ends: 135 [2021-05-02 16:58:57,157 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 270.2ms TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2021-05-02 16:58:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-02 16:58:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2021-05-02 16:58:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:58:57,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2021-05-02 16:58:57,164 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 130 [2021-05-02 16:58:57,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:57,165 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2021-05-02 16:58:57,165 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 17 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:58:57,165 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2021-05-02 16:58:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 16:58:57,166 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:57,166 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:57,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 16:58:57,370 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:57,371 INFO L82 PathProgramCache]: Analyzing trace with hash -530918218, now seen corresponding path program 15 times [2021-05-02 16:58:57,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:57,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408312854] [2021-05-02 16:58:57,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:57,375 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:57,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507945010] [2021-05-02 16:58:57,375 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:58,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 16:58:58,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:58,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 16:58:58,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:58,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:58:58,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:58:58,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408312854] [2021-05-02 16:58:58,578 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:58:58,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507945010] [2021-05-02 16:58:58,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507945010] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:58:58,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:58:58,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 16:58:58,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561506435] [2021-05-02 16:58:58,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 16:58:58,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:58:58,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 16:58:58,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 16:58:58,580 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:58:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:58:58,933 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2021-05-02 16:58:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 16:58:58,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 132 [2021-05-02 16:58:58,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:58:58,935 INFO L225 Difference]: With dead ends: 146 [2021-05-02 16:58:58,935 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 16:58:58,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 308.6ms TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 16:58:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 16:58:58,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 16:58:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:58:58,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2021-05-02 16:58:58,942 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2021-05-02 16:58:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:58:58,942 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2021-05-02 16:58:58,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.157894736842105) internal successors, (98), 18 states have internal predecessors, (98), 18 states have call successors, (18), 18 states have call predecessors, (18), 16 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 16:58:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2021-05-02 16:58:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 16:58:58,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:58:58,943 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:58:59,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 16:58:59,144 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:58:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:58:59,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1557719340, now seen corresponding path program 15 times [2021-05-02 16:58:59,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:58:59,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745271117] [2021-05-02 16:58:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:58:59,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:58:59,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834704662] [2021-05-02 16:58:59,153 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:58:59,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 16:58:59,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:58:59,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 16:58:59,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:58:59,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:59,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:59,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:58:59,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,796 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 1) (= c_main_~y~0 1) (= (* 2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0)) (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0))) (< 0 c_main_~k~0)) is different from true [2021-05-02 16:59:01,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:01,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,359 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2021-05-02 16:59:02,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 992 backedges. 110 proven. 504 refuted. 0 times theorem prover too weak. 363 trivial. 15 not checked. [2021-05-02 16:59:02,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:02,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745271117] [2021-05-02 16:59:02,543 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:02,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834704662] [2021-05-02 16:59:02,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834704662] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:02,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:02,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 16:59:02,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293929933] [2021-05-02 16:59:02,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 16:59:02,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 16:59:02,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=551, Unknown=1, NotChecked=46, Total=650 [2021-05-02 16:59:02,544 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:06,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:06,762 INFO L93 Difference]: Finished difference Result 148 states and 150 transitions. [2021-05-02 16:59:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 16:59:06,763 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 138 [2021-05-02 16:59:06,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:06,764 INFO L225 Difference]: With dead ends: 148 [2021-05-02 16:59:06,764 INFO L226 Difference]: Without dead ends: 143 [2021-05-02 16:59:06,764 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2632.3ms TimeCoverageRelationStatistics Valid=68, Invalid=691, Unknown=1, NotChecked=52, Total=812 [2021-05-02 16:59:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-05-02 16:59:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2021-05-02 16:59:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:59:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-05-02 16:59:06,772 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 138 [2021-05-02 16:59:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:06,772 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-05-02 16:59:06,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 18 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-05-02 16:59:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 16:59:06,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:06,773 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:06,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 16:59:06,979 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:06,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:06,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1623037447, now seen corresponding path program 16 times [2021-05-02 16:59:06,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:06,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760837419] [2021-05-02 16:59:06,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:06,984 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:06,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142909148] [2021-05-02 16:59:06,984 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:07,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:59:07,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:07,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 16:59:07,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:07,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:07,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:08,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:08,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:08,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760837419] [2021-05-02 16:59:08,258 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:08,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142909148] [2021-05-02 16:59:08,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142909148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:08,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:08,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-05-02 16:59:08,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375840629] [2021-05-02 16:59:08,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 16:59:08,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 16:59:08,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:59:08,260 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:08,633 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2021-05-02 16:59:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 16:59:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Word has length 140 [2021-05-02 16:59:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:08,634 INFO L225 Difference]: With dead ends: 154 [2021-05-02 16:59:08,634 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 16:59:08,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 16:59:08,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 16:59:08,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 16:59:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:59:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2021-05-02 16:59:08,642 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 140 [2021-05-02 16:59:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:08,643 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2021-05-02 16:59:08,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.2) internal successors, (104), 19 states have internal predecessors, (104), 19 states have call successors, (19), 19 states have call predecessors, (19), 17 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 16:59:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2021-05-02 16:59:08,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 16:59:08,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:08,644 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:08,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 16:59:08,849 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:08,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:08,849 INFO L82 PathProgramCache]: Analyzing trace with hash 831286743, now seen corresponding path program 16 times [2021-05-02 16:59:08,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:08,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677737489] [2021-05-02 16:59:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:08,853 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:08,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173599913] [2021-05-02 16:59:08,853 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:09,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:59:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:09,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 16:59:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:09,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 33 proven. 593 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 16:59:10,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:10,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677737489] [2021-05-02 16:59:10,423 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:10,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173599913] [2021-05-02 16:59:10,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173599913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:10,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:10,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 16:59:10,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105851545] [2021-05-02 16:59:10,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 16:59:10,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 16:59:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:59:10,424 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:59:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:11,067 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2021-05-02 16:59:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 16:59:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 146 [2021-05-02 16:59:11,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:11,068 INFO L225 Difference]: With dead ends: 156 [2021-05-02 16:59:11,068 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 16:59:11,069 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2021-05-02 16:59:11,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 16:59:11,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-02 16:59:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:59:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-05-02 16:59:11,076 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 146 [2021-05-02 16:59:11,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:11,076 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-05-02 16:59:11,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 23 states have internal predecessors, (63), 19 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:59:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-05-02 16:59:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 16:59:11,077 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:11,077 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:11,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-02 16:59:11,284 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:11,284 INFO L82 PathProgramCache]: Analyzing trace with hash 699272252, now seen corresponding path program 17 times [2021-05-02 16:59:11,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:11,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085866900] [2021-05-02 16:59:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:11,289 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:11,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580399460] [2021-05-02 16:59:11,290 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:11,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 16:59:11,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:11,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 16:59:11,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:11,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:12,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:12,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085866900] [2021-05-02 16:59:12,189 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:12,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580399460] [2021-05-02 16:59:12,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580399460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:12,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:12,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-05-02 16:59:12,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498413706] [2021-05-02 16:59:12,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 16:59:12,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:12,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 16:59:12,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 16:59:12,191 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:59:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:14,601 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2021-05-02 16:59:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 16:59:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 148 [2021-05-02 16:59:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:14,602 INFO L225 Difference]: With dead ends: 162 [2021-05-02 16:59:14,602 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 16:59:14,603 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 16:59:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 16:59:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-05-02 16:59:14,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:59:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2021-05-02 16:59:14,611 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 148 [2021-05-02 16:59:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:14,611 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2021-05-02 16:59:14,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.238095238095238) internal successors, (110), 20 states have internal predecessors, (110), 20 states have call successors, (20), 20 states have call predecessors, (20), 18 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 16:59:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2021-05-02 16:59:14,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 16:59:14,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:14,613 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:14,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:14,818 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:14,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1988619814, now seen corresponding path program 17 times [2021-05-02 16:59:14,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:14,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415032367] [2021-05-02 16:59:14,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:14,824 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:14,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925160771] [2021-05-02 16:59:14,824 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:15,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 16:59:15,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:15,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 16:59:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:15,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:15,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 41 proven. 658 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2021-05-02 16:59:16,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:16,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415032367] [2021-05-02 16:59:16,144 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:16,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925160771] [2021-05-02 16:59:16,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925160771] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:16,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:16,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 16:59:16,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649383885] [2021-05-02 16:59:16,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 16:59:16,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:16,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 16:59:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2021-05-02 16:59:16,145 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:59:16,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:16,783 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2021-05-02 16:59:16,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 16:59:16,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 154 [2021-05-02 16:59:16,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:16,785 INFO L225 Difference]: With dead ends: 164 [2021-05-02 16:59:16,785 INFO L226 Difference]: Without dead ends: 159 [2021-05-02 16:59:16,785 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 497.7ms TimeCoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:59:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-05-02 16:59:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2021-05-02 16:59:16,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:59:16,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2021-05-02 16:59:16,794 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 154 [2021-05-02 16:59:16,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:16,794 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2021-05-02 16:59:16,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.75) internal successors, (66), 24 states have internal predecessors, (66), 20 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:59:16,794 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2021-05-02 16:59:16,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 16:59:16,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:16,795 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:16,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 16:59:16,997 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash 893434751, now seen corresponding path program 18 times [2021-05-02 16:59:16,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:16,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39550466] [2021-05-02 16:59:16,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:17,002 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:17,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427933029] [2021-05-02 16:59:17,002 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:17,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 16:59:17,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:17,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 16:59:17,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:17,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:17,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:18,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:18,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39550466] [2021-05-02 16:59:18,171 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:18,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427933029] [2021-05-02 16:59:18,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427933029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:18,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:18,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-05-02 16:59:18,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820243483] [2021-05-02 16:59:18,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 16:59:18,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 16:59:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:59:18,172 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:59:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:18,625 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2021-05-02 16:59:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 16:59:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 156 [2021-05-02 16:59:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:18,626 INFO L225 Difference]: With dead ends: 170 [2021-05-02 16:59:18,626 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 16:59:18,627 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 16:59:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 16:59:18,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2021-05-02 16:59:18,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:59:18,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2021-05-02 16:59:18,636 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 156 [2021-05-02 16:59:18,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:18,637 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2021-05-02 16:59:18,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 21 states have internal predecessors, (116), 21 states have call successors, (21), 21 states have call predecessors, (21), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 16:59:18,637 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2021-05-02 16:59:18,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 16:59:18,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:18,638 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:18,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:18,844 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:18,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1514996445, now seen corresponding path program 18 times [2021-05-02 16:59:18,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:18,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571261257] [2021-05-02 16:59:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:18,849 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:18,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110730991] [2021-05-02 16:59:18,850 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:19,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 16:59:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 16:59:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:22,072 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) (* 2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0))) 0)) is different from true [2021-05-02 16:59:22,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 37 proven. 721 refuted. 0 times theorem prover too weak. 630 trivial. 18 not checked. [2021-05-02 16:59:22,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:22,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571261257] [2021-05-02 16:59:22,649 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:22,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110730991] [2021-05-02 16:59:22,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110730991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:22,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:22,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 16:59:22,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491128037] [2021-05-02 16:59:22,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 16:59:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:22,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 16:59:22,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=601, Unknown=1, NotChecked=48, Total=702 [2021-05-02 16:59:22,654 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:59:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:25,447 INFO L93 Difference]: Finished difference Result 172 states and 174 transitions. [2021-05-02 16:59:25,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 16:59:25,448 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 162 [2021-05-02 16:59:25,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:25,449 INFO L225 Difference]: With dead ends: 172 [2021-05-02 16:59:25,449 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 16:59:25,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2536.3ms TimeCoverageRelationStatistics Valid=67, Invalid=748, Unknown=1, NotChecked=54, Total=870 [2021-05-02 16:59:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 16:59:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2021-05-02 16:59:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:59:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2021-05-02 16:59:25,460 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 162 [2021-05-02 16:59:25,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:25,460 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2021-05-02 16:59:25,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 21 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:59:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2021-05-02 16:59:25,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 16:59:25,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:25,461 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:25,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 16:59:25,668 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash 614299586, now seen corresponding path program 19 times [2021-05-02 16:59:25,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:25,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392760059] [2021-05-02 16:59:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:25,677 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:25,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139323153] [2021-05-02 16:59:25,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:59:25,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 16:59:25,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:25,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:25,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:26,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:26,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:26,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392760059] [2021-05-02 16:59:26,261 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:26,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139323153] [2021-05-02 16:59:26,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139323153] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:26,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:26,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-02 16:59:26,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157842810] [2021-05-02 16:59:26,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 16:59:26,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:26,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 16:59:26,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 16:59:26,263 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:59:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:26,989 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2021-05-02 16:59:26,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 16:59:26,989 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 164 [2021-05-02 16:59:26,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:26,990 INFO L225 Difference]: With dead ends: 178 [2021-05-02 16:59:26,990 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 16:59:26,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 496.8ms TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 16:59:26,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 16:59:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 16:59:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:59:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2021-05-02 16:59:26,999 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 164 [2021-05-02 16:59:26,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:26,999 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2021-05-02 16:59:26,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 22 states have internal predecessors, (122), 22 states have call successors, (22), 22 states have call predecessors, (22), 20 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-02 16:59:26,999 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2021-05-02 16:59:27,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 16:59:27,000 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:27,002 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:27,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:27,203 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:27,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:27,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1080967392, now seen corresponding path program 19 times [2021-05-02 16:59:27,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:27,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013390349] [2021-05-02 16:59:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:27,207 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:27,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401765963] [2021-05-02 16:59:27,207 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:59:27,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 92 conjunts are in the unsatisfiable core [2021-05-02 16:59:27,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:27,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:28,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 39 proven. 818 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2021-05-02 16:59:28,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:28,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013390349] [2021-05-02 16:59:28,751 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:28,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401765963] [2021-05-02 16:59:28,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401765963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:28,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:28,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 16:59:28,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013618325] [2021-05-02 16:59:28,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 16:59:28,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:28,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 16:59:28,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2021-05-02 16:59:28,753 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:59:29,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:29,445 INFO L93 Difference]: Finished difference Result 180 states and 182 transitions. [2021-05-02 16:59:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 16:59:29,446 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 170 [2021-05-02 16:59:29,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:29,446 INFO L225 Difference]: With dead ends: 180 [2021-05-02 16:59:29,446 INFO L226 Difference]: Without dead ends: 175 [2021-05-02 16:59:29,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:59:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-02 16:59:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2021-05-02 16:59:29,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:59:29,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2021-05-02 16:59:29,456 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2021-05-02 16:59:29,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:29,457 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2021-05-02 16:59:29,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 22 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:59:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2021-05-02 16:59:29,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 16:59:29,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:29,458 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:29,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:29,663 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:29,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:29,664 INFO L82 PathProgramCache]: Analyzing trace with hash 124207365, now seen corresponding path program 20 times [2021-05-02 16:59:29,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:29,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021855564] [2021-05-02 16:59:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:29,671 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:29,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52822897] [2021-05-02 16:59:29,671 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:29,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:59:29,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 16:59:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:29,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:29,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:30,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021855564] [2021-05-02 16:59:30,310 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:30,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52822897] [2021-05-02 16:59:30,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52822897] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:30,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:30,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2021-05-02 16:59:30,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519308616] [2021-05-02 16:59:30,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 16:59:30,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:30,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 16:59:30,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 16:59:30,311 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:59:30,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:30,862 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2021-05-02 16:59:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 16:59:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 172 [2021-05-02 16:59:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:30,863 INFO L225 Difference]: With dead ends: 186 [2021-05-02 16:59:30,863 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 16:59:30,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 16:59:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 16:59:30,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-05-02 16:59:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:59:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2021-05-02 16:59:30,873 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 172 [2021-05-02 16:59:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:30,873 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2021-05-02 16:59:30,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.333333333333333) internal successors, (128), 23 states have internal predecessors, (128), 23 states have call successors, (23), 23 states have call predecessors, (23), 21 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 16:59:30,873 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2021-05-02 16:59:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 16:59:30,874 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:30,874 INFO L523 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:31,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-05-02 16:59:31,081 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash -985740317, now seen corresponding path program 20 times [2021-05-02 16:59:31,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:31,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399671541] [2021-05-02 16:59:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:31,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:31,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1276611898] [2021-05-02 16:59:31,087 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:32,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:59:32,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:32,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-02 16:59:32,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:32,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1722 backedges. 41 proven. 901 refuted. 0 times theorem prover too weak. 780 trivial. 0 not checked. [2021-05-02 16:59:32,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:32,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399671541] [2021-05-02 16:59:32,851 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:32,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276611898] [2021-05-02 16:59:32,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276611898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:32,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:32,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-02 16:59:32,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8455120] [2021-05-02 16:59:32,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 16:59:32,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:32,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 16:59:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:59:32,853 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:59:33,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:33,622 INFO L93 Difference]: Finished difference Result 188 states and 190 transitions. [2021-05-02 16:59:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 16:59:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 178 [2021-05-02 16:59:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:33,624 INFO L225 Difference]: With dead ends: 188 [2021-05-02 16:59:33,624 INFO L226 Difference]: Without dead ends: 183 [2021-05-02 16:59:33,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 426.5ms TimeCoverageRelationStatistics Valid=69, Invalid=861, Unknown=0, NotChecked=0, Total=930 [2021-05-02 16:59:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-05-02 16:59:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2021-05-02 16:59:33,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:59:33,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2021-05-02 16:59:33,634 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 178 [2021-05-02 16:59:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:33,634 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2021-05-02 16:59:33,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 23 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:59:33,635 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2021-05-02 16:59:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 16:59:33,635 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:33,635 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:33,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:33,841 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:33,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1707010232, now seen corresponding path program 21 times [2021-05-02 16:59:33,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:33,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468527420] [2021-05-02 16:59:33,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:33,845 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:33,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1979213373] [2021-05-02 16:59:33,845 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:35,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 16:59:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:35,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 16:59:35,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:35,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:35,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468527420] [2021-05-02 16:59:35,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:35,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979213373] [2021-05-02 16:59:35,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979213373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:35,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:35,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-05-02 16:59:35,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869904590] [2021-05-02 16:59:35,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 16:59:35,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 16:59:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 16:59:35,842 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:59:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:36,423 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2021-05-02 16:59:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 16:59:36,424 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 180 [2021-05-02 16:59:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:36,425 INFO L225 Difference]: With dead ends: 194 [2021-05-02 16:59:36,425 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 16:59:36,426 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 546.8ms TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 16:59:36,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 16:59:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2021-05-02 16:59:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:59:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2021-05-02 16:59:36,435 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 180 [2021-05-02 16:59:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:36,435 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2021-05-02 16:59:36,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.36) internal successors, (134), 24 states have internal predecessors, (134), 24 states have call successors, (24), 24 states have call predecessors, (24), 22 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 16:59:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2021-05-02 16:59:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 16:59:36,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:36,436 INFO L523 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:36,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 16:59:36,643 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:36,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:36,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1596040166, now seen corresponding path program 21 times [2021-05-02 16:59:36,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:36,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147131160] [2021-05-02 16:59:36,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:36,648 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:36,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [205611841] [2021-05-02 16:59:36,648 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:38,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 16:59:38,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:38,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 16:59:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:40,081 WARN L860 $PredicateComparison]: unable to prove that (and (= c_main_~c~0 0) (= c_main_~y~0 0) (= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) (* 2 (* c_main_~y~0 c_main_~y~0 c_main_~y~0))) 0)) is different from true [2021-05-02 16:59:40,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:40,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:41,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:41,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:41,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 43 proven. 967 refuted. 0 times theorem prover too weak. 861 trivial. 21 not checked. [2021-05-02 16:59:41,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:41,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147131160] [2021-05-02 16:59:41,075 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:41,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205611841] [2021-05-02 16:59:41,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205611841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:41,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:41,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 16:59:41,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061720553] [2021-05-02 16:59:41,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 16:59:41,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:41,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 16:59:41,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=757, Unknown=1, NotChecked=54, Total=870 [2021-05-02 16:59:41,076 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:59:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:43,843 INFO L93 Difference]: Finished difference Result 196 states and 198 transitions. [2021-05-02 16:59:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 16:59:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 186 [2021-05-02 16:59:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:43,844 INFO L225 Difference]: With dead ends: 196 [2021-05-02 16:59:43,844 INFO L226 Difference]: Without dead ends: 191 [2021-05-02 16:59:43,845 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2808.8ms TimeCoverageRelationStatistics Valid=73, Invalid=922, Unknown=1, NotChecked=60, Total=1056 [2021-05-02 16:59:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-02 16:59:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-05-02 16:59:43,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:59:43,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-05-02 16:59:43,854 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 186 [2021-05-02 16:59:43,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:43,855 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-05-02 16:59:43,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.689655172413793) internal successors, (78), 28 states have internal predecessors, (78), 24 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:59:43,855 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-05-02 16:59:43,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 16:59:43,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:43,856 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:44,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:44,072 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:44,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:44,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1187904139, now seen corresponding path program 22 times [2021-05-02 16:59:44,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:44,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381167690] [2021-05-02 16:59:44,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:44,078 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:44,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1897559648] [2021-05-02 16:59:44,079 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:45,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:59:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:45,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 16:59:45,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:45,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:45,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:46,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:46,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:46,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:46,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:46,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:46,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381167690] [2021-05-02 16:59:46,075 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:46,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897559648] [2021-05-02 16:59:46,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897559648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:46,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:46,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2021-05-02 16:59:46,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213548998] [2021-05-02 16:59:46,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 16:59:46,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:46,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 16:59:46,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 16:59:46,076 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:59:46,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:46,775 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2021-05-02 16:59:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 16:59:46,775 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Word has length 188 [2021-05-02 16:59:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:46,776 INFO L225 Difference]: With dead ends: 202 [2021-05-02 16:59:46,776 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 16:59:46,777 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 578.0ms TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 16:59:46,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 16:59:46,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2021-05-02 16:59:46,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:59:46,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 198 transitions. [2021-05-02 16:59:46,786 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 198 transitions. Word has length 188 [2021-05-02 16:59:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:46,787 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 198 transitions. [2021-05-02 16:59:46,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 5.384615384615385) internal successors, (140), 25 states have internal predecessors, (140), 25 states have call successors, (25), 25 states have call predecessors, (25), 23 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2021-05-02 16:59:46,787 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 198 transitions. [2021-05-02 16:59:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 16:59:46,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:46,788 INFO L523 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:46,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-02 16:59:46,994 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1903806697, now seen corresponding path program 22 times [2021-05-02 16:59:46,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:46,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215491762] [2021-05-02 16:59:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:47,001 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:47,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279140410] [2021-05-02 16:59:47,001 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:48,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:59:48,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:48,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 104 conjunts are in the unsatisfiable core [2021-05-02 16:59:48,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:48,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 45 proven. 1079 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2021-05-02 16:59:49,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215491762] [2021-05-02 16:59:49,341 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:49,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279140410] [2021-05-02 16:59:49,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279140410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:49,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:49,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 16:59:49,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312460882] [2021-05-02 16:59:49,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 16:59:49,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:49,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 16:59:49,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2021-05-02 16:59:49,343 INFO L87 Difference]: Start difference. First operand 197 states and 198 transitions. Second operand has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:59:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:50,140 INFO L93 Difference]: Finished difference Result 204 states and 206 transitions. [2021-05-02 16:59:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 16:59:50,140 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 194 [2021-05-02 16:59:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:50,141 INFO L225 Difference]: With dead ends: 204 [2021-05-02 16:59:50,141 INFO L226 Difference]: Without dead ends: 199 [2021-05-02 16:59:50,142 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 488.7ms TimeCoverageRelationStatistics Valid=73, Invalid=983, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 16:59:50,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-05-02 16:59:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2021-05-02 16:59:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 16:59:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2021-05-02 16:59:50,151 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 194 [2021-05-02 16:59:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:50,151 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2021-05-02 16:59:50,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.793103448275862) internal successors, (81), 29 states have internal predecessors, (81), 25 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:59:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2021-05-02 16:59:50,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-02 16:59:50,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:50,152 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:50,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:50,357 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:50,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:50,357 INFO L82 PathProgramCache]: Analyzing trace with hash 598797006, now seen corresponding path program 23 times [2021-05-02 16:59:50,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:50,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026929837] [2021-05-02 16:59:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:50,362 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:50,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787055598] [2021-05-02 16:59:50,362 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:50,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 16:59:50,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:50,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 16:59:50,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:51,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:51,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:51,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026929837] [2021-05-02 16:59:51,654 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:51,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787055598] [2021-05-02 16:59:51,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787055598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:51,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:51,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2021-05-02 16:59:51,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642102668] [2021-05-02 16:59:51,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 16:59:51,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:51,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 16:59:51,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 16:59:51,655 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 26 states have internal predecessors, (146), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:59:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:52,304 INFO L93 Difference]: Finished difference Result 210 states and 211 transitions. [2021-05-02 16:59:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 16:59:52,304 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 26 states have internal predecessors, (146), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 196 [2021-05-02 16:59:52,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:52,305 INFO L225 Difference]: With dead ends: 210 [2021-05-02 16:59:52,305 INFO L226 Difference]: Without dead ends: 205 [2021-05-02 16:59:52,306 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 667.1ms TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 16:59:52,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-02 16:59:52,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-05-02 16:59:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 16:59:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2021-05-02 16:59:52,315 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 196 [2021-05-02 16:59:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:52,315 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2021-05-02 16:59:52,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.407407407407407) internal successors, (146), 26 states have internal predecessors, (146), 26 states have call successors, (26), 26 states have call predecessors, (26), 24 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 16:59:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2021-05-02 16:59:52,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 16:59:52,317 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:52,317 INFO L523 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:52,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:52,523 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:52,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:52,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1286224620, now seen corresponding path program 23 times [2021-05-02 16:59:52,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:52,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148341710] [2021-05-02 16:59:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:52,528 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:52,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126562881] [2021-05-02 16:59:52,528 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:53,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 16:59:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:53,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 109 conjunts are in the unsatisfiable core [2021-05-02 16:59:53,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:53,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:53,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:54,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2256 backedges. 116 proven. 1105 refuted. 0 times theorem prover too weak. 1035 trivial. 0 not checked. [2021-05-02 16:59:54,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:54,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148341710] [2021-05-02 16:59:54,289 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:54,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126562881] [2021-05-02 16:59:54,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126562881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:54,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:54,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-02 16:59:54,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998069] [2021-05-02 16:59:54,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 16:59:54,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:54,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 16:59:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2021-05-02 16:59:54,291 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 26 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 16:59:55,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:55,195 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2021-05-02 16:59:55,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 16:59:55,195 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 26 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 202 [2021-05-02 16:59:55,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:55,196 INFO L225 Difference]: With dead ends: 212 [2021-05-02 16:59:55,196 INFO L226 Difference]: Without dead ends: 207 [2021-05-02 16:59:55,196 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 611.2ms TimeCoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 16:59:55,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-02 16:59:55,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2021-05-02 16:59:55,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 16:59:55,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2021-05-02 16:59:55,206 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 202 [2021-05-02 16:59:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:55,207 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2021-05-02 16:59:55,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 2.8) internal successors, (84), 30 states have internal predecessors, (84), 26 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 16:59:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2021-05-02 16:59:55,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 16:59:55,208 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:55,208 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:55,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-02 16:59:55,415 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:55,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:55,415 INFO L82 PathProgramCache]: Analyzing trace with hash -192092143, now seen corresponding path program 24 times [2021-05-02 16:59:55,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:55,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008235367] [2021-05-02 16:59:55,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:55,427 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:55,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801438723] [2021-05-02 16:59:55,428 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:57,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 16:59:57,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:59:57,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-02 16:59:57,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:59:57,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:59:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 16:59:57,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:59:57,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008235367] [2021-05-02 16:59:57,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:59:57,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801438723] [2021-05-02 16:59:57,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801438723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:59:57,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:59:57,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2021-05-02 16:59:57,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078732662] [2021-05-02 16:59:57,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 16:59:57,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:59:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 16:59:57,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 16:59:57,828 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 27 states have internal predecessors, (152), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 16:59:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:59:58,837 INFO L93 Difference]: Finished difference Result 218 states and 219 transitions. [2021-05-02 16:59:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 16:59:58,837 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 27 states have internal predecessors, (152), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 204 [2021-05-02 16:59:58,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:59:58,838 INFO L225 Difference]: With dead ends: 218 [2021-05-02 16:59:58,838 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 16:59:58,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 706.0ms TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 16:59:58,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 16:59:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-05-02 16:59:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 16:59:58,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2021-05-02 16:59:58,849 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 204 [2021-05-02 16:59:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:59:58,849 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2021-05-02 16:59:58,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 5.428571428571429) internal successors, (152), 27 states have internal predecessors, (152), 27 states have call successors, (27), 27 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 16:59:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2021-05-02 16:59:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 16:59:58,850 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:59:58,850 INFO L523 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:59:59,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:59:59,057 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:59:59,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:59:59,057 INFO L82 PathProgramCache]: Analyzing trace with hash 773192175, now seen corresponding path program 24 times [2021-05-02 16:59:59,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:59:59,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021588296] [2021-05-02 16:59:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:59:59,062 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:59:59,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189414491] [2021-05-02 16:59:59,063 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:01,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 17:00:01,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 117 conjunts are in the unsatisfiable core [2021-05-02 17:00:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:01,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:01,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2450 backedges. 52 proven. 1270 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2021-05-02 17:00:02,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:02,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021588296] [2021-05-02 17:00:02,334 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:02,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189414491] [2021-05-02 17:00:02,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189414491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:02,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:02,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-02 17:00:02,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391365243] [2021-05-02 17:00:02,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 17:00:02,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:02,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 17:00:02,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:00:02,337 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 33 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 27 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 17:00:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:28,263 INFO L93 Difference]: Finished difference Result 220 states and 222 transitions. [2021-05-02 17:00:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 17:00:28,263 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 27 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 210 [2021-05-02 17:00:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:28,264 INFO L225 Difference]: With dead ends: 220 [2021-05-02 17:00:28,264 INFO L226 Difference]: Without dead ends: 215 [2021-05-02 17:00:28,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 688.4ms TimeCoverageRelationStatistics Valid=80, Invalid=1180, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:00:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-02 17:00:28,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-05-02 17:00:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 17:00:28,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2021-05-02 17:00:28,274 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 210 [2021-05-02 17:00:28,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:28,274 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2021-05-02 17:00:28,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 2.71875) internal successors, (87), 31 states have internal predecessors, (87), 27 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 17:00:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2021-05-02 17:00:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-02 17:00:28,276 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:28,276 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:28,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-02 17:00:28,484 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:28,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:28,484 INFO L82 PathProgramCache]: Analyzing trace with hash 704967252, now seen corresponding path program 25 times [2021-05-02 17:00:28,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:28,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354494160] [2021-05-02 17:00:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:28,491 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:28,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066220350] [2021-05-02 17:00:28,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:28,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:28,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 630 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 17:00:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:28,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:28,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:29,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:29,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354494160] [2021-05-02 17:00:29,262 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:29,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066220350] [2021-05-02 17:00:29,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066220350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:29,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:29,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-05-02 17:00:29,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886035694] [2021-05-02 17:00:29,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:00:29,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:29,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:00:29,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:00:29,264 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand has 29 states, 29 states have (on average 5.448275862068965) internal successors, (158), 28 states have internal predecessors, (158), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 17:00:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:30,080 INFO L93 Difference]: Finished difference Result 226 states and 227 transitions. [2021-05-02 17:00:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 17:00:30,081 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.448275862068965) internal successors, (158), 28 states have internal predecessors, (158), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 212 [2021-05-02 17:00:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:30,082 INFO L225 Difference]: With dead ends: 226 [2021-05-02 17:00:30,082 INFO L226 Difference]: Without dead ends: 221 [2021-05-02 17:00:30,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 700.7ms TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 17:00:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-02 17:00:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-05-02 17:00:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 17:00:30,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 222 transitions. [2021-05-02 17:00:30,092 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 222 transitions. Word has length 212 [2021-05-02 17:00:30,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:30,092 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 222 transitions. [2021-05-02 17:00:30,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 5.448275862068965) internal successors, (158), 28 states have internal predecessors, (158), 28 states have call successors, (28), 28 states have call predecessors, (28), 26 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 17:00:30,092 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 222 transitions. [2021-05-02 17:00:30,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 17:00:30,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:30,094 INFO L523 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:30,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-02 17:00:30,315 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:30,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:30,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1075840498, now seen corresponding path program 25 times [2021-05-02 17:00:30,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:30,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30512373] [2021-05-02 17:00:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:30,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:30,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331714320] [2021-05-02 17:00:30,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:00:31,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 116 conjunts are in the unsatisfiable core [2021-05-02 17:00:31,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:31,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2652 backedges. 51 proven. 1376 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2021-05-02 17:00:32,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:32,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30512373] [2021-05-02 17:00:32,149 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:32,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331714320] [2021-05-02 17:00:32,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331714320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:32,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:32,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-02 17:00:32,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124667079] [2021-05-02 17:00:32,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 17:00:32,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:32,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 17:00:32,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:00:32,151 INFO L87 Difference]: Start difference. First operand 221 states and 222 transitions. Second operand has 33 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 28 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 17:00:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:33,284 INFO L93 Difference]: Finished difference Result 228 states and 230 transitions. [2021-05-02 17:00:33,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 17:00:33,285 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 28 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 218 [2021-05-02 17:00:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:33,286 INFO L225 Difference]: With dead ends: 228 [2021-05-02 17:00:33,286 INFO L226 Difference]: Without dead ends: 223 [2021-05-02 17:00:33,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 837.9ms TimeCoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:00:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-02 17:00:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2021-05-02 17:00:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 17:00:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2021-05-02 17:00:33,295 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 218 [2021-05-02 17:00:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:33,295 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2021-05-02 17:00:33,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 2.8125) internal successors, (90), 32 states have internal predecessors, (90), 28 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 17:00:33,296 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2021-05-02 17:00:33,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 17:00:33,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:33,297 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:33,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:33,503 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:33,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash -507770473, now seen corresponding path program 26 times [2021-05-02 17:00:33,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:33,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306960031] [2021-05-02 17:00:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:33,509 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:33,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119885797] [2021-05-02 17:00:33,509 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:33,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:00:33,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:33,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 17:00:33,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:33,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:33,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:34,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:34,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306960031] [2021-05-02 17:00:34,353 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119885797] [2021-05-02 17:00:34,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119885797] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:34,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:34,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2021-05-02 17:00:34,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775096363] [2021-05-02 17:00:34,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 17:00:34,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:34,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 17:00:34,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:00:34,354 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 30 states, 30 states have (on average 5.466666666666667) internal successors, (164), 29 states have internal predecessors, (164), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 17:00:35,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:35,247 INFO L93 Difference]: Finished difference Result 234 states and 235 transitions. [2021-05-02 17:00:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 17:00:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.466666666666667) internal successors, (164), 29 states have internal predecessors, (164), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 220 [2021-05-02 17:00:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:35,249 INFO L225 Difference]: With dead ends: 234 [2021-05-02 17:00:35,249 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 17:00:35,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 787.0ms TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 17:00:35,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 17:00:35,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2021-05-02 17:00:35,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 17:00:35,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2021-05-02 17:00:35,260 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 220 [2021-05-02 17:00:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:35,260 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2021-05-02 17:00:35,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 5.466666666666667) internal successors, (164), 29 states have internal predecessors, (164), 29 states have call successors, (29), 29 states have call predecessors, (29), 27 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 17:00:35,260 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2021-05-02 17:00:35,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-02 17:00:35,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:35,261 INFO L523 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:35,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:35,481 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:35,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:35,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1708433675, now seen corresponding path program 26 times [2021-05-02 17:00:35,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:35,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106309049] [2021-05-02 17:00:35,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:35,486 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:35,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133534195] [2021-05-02 17:00:35,486 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:36,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:00:36,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:36,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 120 conjunts are in the unsatisfiable core [2021-05-02 17:00:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:36,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:37,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2862 backedges. 53 proven. 1483 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2021-05-02 17:00:37,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:37,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106309049] [2021-05-02 17:00:37,564 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:37,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133534195] [2021-05-02 17:00:37,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133534195] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:37,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:37,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-02 17:00:37,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506336673] [2021-05-02 17:00:37,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 17:00:37,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:37,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 17:00:37,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:00:37,565 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 17:00:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:38,610 INFO L93 Difference]: Finished difference Result 236 states and 238 transitions. [2021-05-02 17:00:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:00:38,610 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 226 [2021-05-02 17:00:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:38,611 INFO L225 Difference]: With dead ends: 236 [2021-05-02 17:00:38,611 INFO L226 Difference]: Without dead ends: 231 [2021-05-02 17:00:38,612 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 883.6ms TimeCoverageRelationStatistics Valid=81, Invalid=1251, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:00:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-02 17:00:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-05-02 17:00:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 17:00:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2021-05-02 17:00:38,623 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 226 [2021-05-02 17:00:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:38,623 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2021-05-02 17:00:38,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 17:00:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2021-05-02 17:00:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-02 17:00:38,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:38,625 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:38,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:38,830 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:38,831 INFO L82 PathProgramCache]: Analyzing trace with hash -430625318, now seen corresponding path program 27 times [2021-05-02 17:00:38,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:38,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665449978] [2021-05-02 17:00:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:38,835 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:38,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [43585881] [2021-05-02 17:00:38,835 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:40,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 17:00:40,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:40,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 59 conjunts are in the unsatisfiable core [2021-05-02 17:00:40,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:40,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:40,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:41,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:41,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:41,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665449978] [2021-05-02 17:00:41,109 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:41,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43585881] [2021-05-02 17:00:41,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43585881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:41,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:41,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2021-05-02 17:00:41,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70325612] [2021-05-02 17:00:41,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:00:41,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:41,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:00:41,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:00:41,110 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 30 states have internal predecessors, (170), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 17:00:41,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:41,815 INFO L93 Difference]: Finished difference Result 242 states and 243 transitions. [2021-05-02 17:00:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 17:00:41,816 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 30 states have internal predecessors, (170), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 228 [2021-05-02 17:00:41,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:41,816 INFO L225 Difference]: With dead ends: 242 [2021-05-02 17:00:41,816 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 17:00:41,817 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 832.6ms TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 17:00:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 17:00:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2021-05-02 17:00:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 17:00:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2021-05-02 17:00:41,839 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 228 [2021-05-02 17:00:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:41,839 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2021-05-02 17:00:41,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 5.483870967741935) internal successors, (170), 30 states have internal predecessors, (170), 30 states have call successors, (30), 30 states have call predecessors, (30), 28 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 17:00:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2021-05-02 17:00:41,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-02 17:00:41,841 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:41,841 INFO L523 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:42,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-05-02 17:00:42,048 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:42,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:42,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1083901176, now seen corresponding path program 27 times [2021-05-02 17:00:42,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:42,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748316374] [2021-05-02 17:00:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:42,052 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:42,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561407088] [2021-05-02 17:00:42,052 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:43,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 17:00:43,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:43,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 131 conjunts are in the unsatisfiable core [2021-05-02 17:00:43,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:43,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 58 proven. 1591 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2021-05-02 17:00:44,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748316374] [2021-05-02 17:00:44,787 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:44,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561407088] [2021-05-02 17:00:44,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561407088] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:44,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:44,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-02 17:00:44,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794394443] [2021-05-02 17:00:44,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:00:44,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:44,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:00:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:00:44,789 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 36 states, 35 states have (on average 2.742857142857143) internal successors, (96), 34 states have internal predecessors, (96), 30 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 17:00:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:46,272 INFO L93 Difference]: Finished difference Result 244 states and 246 transitions. [2021-05-02 17:00:46,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 17:00:46,278 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.742857142857143) internal successors, (96), 34 states have internal predecessors, (96), 30 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 234 [2021-05-02 17:00:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:46,279 INFO L225 Difference]: With dead ends: 244 [2021-05-02 17:00:46,279 INFO L226 Difference]: Without dead ends: 239 [2021-05-02 17:00:46,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 851.7ms TimeCoverageRelationStatistics Valid=86, Invalid=1396, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:00:46,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-05-02 17:00:46,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2021-05-02 17:00:46,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 17:00:46,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2021-05-02 17:00:46,290 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 234 [2021-05-02 17:00:46,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:46,291 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2021-05-02 17:00:46,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 2.742857142857143) internal successors, (96), 34 states have internal predecessors, (96), 30 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 17:00:46,291 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2021-05-02 17:00:46,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 17:00:46,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:46,292 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:46,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:46,493 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:46,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1351393507, now seen corresponding path program 28 times [2021-05-02 17:00:46,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:46,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168046992] [2021-05-02 17:00:46,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:46,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:46,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1924882079] [2021-05-02 17:00:46,497 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:48,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:00:48,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:48,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 17:00:48,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:48,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:48,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:49,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:49,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168046992] [2021-05-02 17:00:49,518 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:49,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924882079] [2021-05-02 17:00:49,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924882079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:49,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:49,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-05-02 17:00:49,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858316511] [2021-05-02 17:00:49,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:00:49,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:49,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:00:49,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:00:49,519 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand has 32 states, 32 states have (on average 5.5) internal successors, (176), 31 states have internal predecessors, (176), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 17:00:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:50,380 INFO L93 Difference]: Finished difference Result 250 states and 251 transitions. [2021-05-02 17:00:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 17:00:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.5) internal successors, (176), 31 states have internal predecessors, (176), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 236 [2021-05-02 17:00:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:50,381 INFO L225 Difference]: With dead ends: 250 [2021-05-02 17:00:50,381 INFO L226 Difference]: Without dead ends: 245 [2021-05-02 17:00:50,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 17:00:50,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-02 17:00:50,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2021-05-02 17:00:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 17:00:50,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 246 transitions. [2021-05-02 17:00:50,391 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 246 transitions. Word has length 236 [2021-05-02 17:00:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:50,391 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 246 transitions. [2021-05-02 17:00:50,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 5.5) internal successors, (176), 31 states have internal predecessors, (176), 31 states have call successors, (31), 31 states have call predecessors, (31), 29 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 17:00:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 246 transitions. [2021-05-02 17:00:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 17:00:50,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:50,393 INFO L523 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:50,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-02 17:00:50,602 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:50,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:50,602 INFO L82 PathProgramCache]: Analyzing trace with hash 617740283, now seen corresponding path program 28 times [2021-05-02 17:00:50,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:50,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916234491] [2021-05-02 17:00:50,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:50,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:50,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539204933] [2021-05-02 17:00:50,610 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:54,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:00:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:54,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 129 conjunts are in the unsatisfiable core [2021-05-02 17:00:54,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:54,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:54,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:55,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3306 backedges. 57 proven. 1709 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2021-05-02 17:00:55,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:55,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916234491] [2021-05-02 17:00:55,219 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:55,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539204933] [2021-05-02 17:00:55,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539204933] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:55,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:55,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-02 17:00:55,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827616111] [2021-05-02 17:00:55,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:00:55,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:55,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:00:55,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:00:55,221 INFO L87 Difference]: Start difference. First operand 245 states and 246 transitions. Second operand has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 17:00:56,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:56,441 INFO L93 Difference]: Finished difference Result 252 states and 254 transitions. [2021-05-02 17:00:56,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 17:00:56,442 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 242 [2021-05-02 17:00:56,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:56,443 INFO L225 Difference]: With dead ends: 252 [2021-05-02 17:00:56,443 INFO L226 Difference]: Without dead ends: 247 [2021-05-02 17:00:56,443 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 206 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 825.1ms TimeCoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:00:56,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-05-02 17:00:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2021-05-02 17:00:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 17:00:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2021-05-02 17:00:56,452 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 242 [2021-05-02 17:00:56,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:56,452 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2021-05-02 17:00:56,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 17:00:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2021-05-02 17:00:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-02 17:00:56,454 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:56,454 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:56,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:56,663 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:56,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1639554400, now seen corresponding path program 29 times [2021-05-02 17:00:56,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:56,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000531642] [2021-05-02 17:00:56,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:56,667 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:56,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [440986016] [2021-05-02 17:00:56,668 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:57,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 17:00:57,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:00:57,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 17:00:57,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:00:57,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:57,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:00:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:00:58,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:00:58,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000531642] [2021-05-02 17:00:58,387 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:00:58,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440986016] [2021-05-02 17:00:58,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440986016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:00:58,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:00:58,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2021-05-02 17:00:58,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791443227] [2021-05-02 17:00:58,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 17:00:58,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:00:58,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 17:00:58,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:00:58,388 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 33 states, 33 states have (on average 5.515151515151516) internal successors, (182), 32 states have internal predecessors, (182), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 17:00:59,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:00:59,393 INFO L93 Difference]: Finished difference Result 258 states and 259 transitions. [2021-05-02 17:00:59,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 17:00:59,393 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.515151515151516) internal successors, (182), 32 states have internal predecessors, (182), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 244 [2021-05-02 17:00:59,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:00:59,394 INFO L225 Difference]: With dead ends: 258 [2021-05-02 17:00:59,394 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 17:00:59,395 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 923.5ms TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 17:00:59,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 17:00:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-05-02 17:00:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 17:00:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2021-05-02 17:00:59,405 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 244 [2021-05-02 17:00:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:00:59,406 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2021-05-02 17:00:59,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 5.515151515151516) internal successors, (182), 32 states have internal predecessors, (182), 32 states have call successors, (32), 32 states have call predecessors, (32), 30 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2021-05-02 17:00:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2021-05-02 17:00:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 17:00:59,407 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:00:59,407 INFO L523 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:00:59,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:00:59,614 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:00:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:00:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash 624113662, now seen corresponding path program 29 times [2021-05-02 17:00:59,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:00:59,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781898921] [2021-05-02 17:00:59,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:00:59,620 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:00:59,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792039597] [2021-05-02 17:00:59,621 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:01:00,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 17:01:00,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:01:00,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 132 conjunts are in the unsatisfiable core [2021-05-02 17:01:00,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:01:01,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:01,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:01,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:01,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:01,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:01,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:01,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:01,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:01,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:02,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3540 backedges. 71 proven. 1816 refuted. 0 times theorem prover too weak. 1653 trivial. 0 not checked. [2021-05-02 17:01:02,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:01:02,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781898921] [2021-05-02 17:01:02,000 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:01:02,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792039597] [2021-05-02 17:01:02,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792039597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:01:02,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:01:02,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2021-05-02 17:01:02,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240833179] [2021-05-02 17:01:02,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 17:01:02,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:01:02,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 17:01:02,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:01:02,002 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 32 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 17:01:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:01:03,234 INFO L93 Difference]: Finished difference Result 260 states and 262 transitions. [2021-05-02 17:01:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 17:01:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 32 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 250 [2021-05-02 17:01:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:01:03,236 INFO L225 Difference]: With dead ends: 260 [2021-05-02 17:01:03,236 INFO L226 Difference]: Without dead ends: 255 [2021-05-02 17:01:03,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 741.4ms TimeCoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:01:03,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-02 17:01:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2021-05-02 17:01:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 17:01:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2021-05-02 17:01:03,244 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 250 [2021-05-02 17:01:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:01:03,244 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2021-05-02 17:01:03,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 2.8333333333333335) internal successors, (102), 36 states have internal predecessors, (102), 32 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 17:01:03,245 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2021-05-02 17:01:03,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-02 17:01:03,246 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:01:03,246 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:01:03,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:01:03,454 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:01:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:01:03,454 INFO L82 PathProgramCache]: Analyzing trace with hash -825562973, now seen corresponding path program 30 times [2021-05-02 17:01:03,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:01:03,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828265422] [2021-05-02 17:01:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:01:03,463 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:01:03,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2029966836] [2021-05-02 17:01:03,465 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:01:05,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 17:01:05,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:01:05,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-02 17:01:05,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:01:05,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:05,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:01:06,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:01:06,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828265422] [2021-05-02 17:01:06,636 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:01:06,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029966836] [2021-05-02 17:01:06,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029966836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:01:06,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:01:06,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2021-05-02 17:01:06,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520554949] [2021-05-02 17:01:06,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 17:01:06,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:01:06,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 17:01:06,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 17:01:06,638 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 33 states have internal predecessors, (188), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 17:01:07,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:01:07,553 INFO L93 Difference]: Finished difference Result 266 states and 267 transitions. [2021-05-02 17:01:07,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 17:01:07,554 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 33 states have internal predecessors, (188), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 252 [2021-05-02 17:01:07,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:01:07,555 INFO L225 Difference]: With dead ends: 266 [2021-05-02 17:01:07,555 INFO L226 Difference]: Without dead ends: 261 [2021-05-02 17:01:07,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 981.3ms TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 17:01:07,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-02 17:01:07,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-05-02 17:01:07,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 17:01:07,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2021-05-02 17:01:07,566 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 252 [2021-05-02 17:01:07,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:01:07,567 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2021-05-02 17:01:07,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 5.529411764705882) internal successors, (188), 33 states have internal predecessors, (188), 33 states have call successors, (33), 33 states have call predecessors, (33), 31 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-02 17:01:07,567 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2021-05-02 17:01:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-02 17:01:07,568 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:01:07,568 INFO L523 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:01:07,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:01:07,777 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:01:07,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:01:07,777 INFO L82 PathProgramCache]: Analyzing trace with hash 220316929, now seen corresponding path program 30 times [2021-05-02 17:01:07,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:01:07,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218311366] [2021-05-02 17:01:07,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:01:07,781 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:01:07,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952456585] [2021-05-02 17:01:07,782 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:01:35,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 17:01:35,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:01:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 151 conjunts are in the unsatisfiable core [2021-05-02 17:01:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:01:36,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:36,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:36,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:36,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:36,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:36,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:36,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:37,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:37,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:37,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:01:37,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 230 proven. 1944 refuted. 0 times theorem prover too weak. 1608 trivial. 0 not checked. [2021-05-02 17:01:37,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:01:37,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218311366] [2021-05-02 17:01:37,392 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:01:37,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952456585] [2021-05-02 17:01:37,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952456585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:01:37,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:01:37,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2021-05-02 17:01:37,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020883174] [2021-05-02 17:01:37,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:01:37,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:01:37,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:01:37,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 17:01:37,393 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand has 41 states, 40 states have (on average 2.625) internal successors, (105), 37 states have internal predecessors, (105), 33 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 17:08:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:08:19,607 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2021-05-02 17:08:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 17:08:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.625) internal successors, (105), 37 states have internal predecessors, (105), 33 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 258 [2021-05-02 17:08:19,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:08:19,609 INFO L225 Difference]: With dead ends: 268 [2021-05-02 17:08:19,609 INFO L226 Difference]: Without dead ends: 263 [2021-05-02 17:08:19,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1303.9ms TimeCoverageRelationStatistics Valid=99, Invalid=1793, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:08:19,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-05-02 17:08:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-05-02 17:08:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 17:08:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 265 transitions. [2021-05-02 17:08:19,619 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 265 transitions. Word has length 258 [2021-05-02 17:08:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:08:19,620 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 265 transitions. [2021-05-02 17:08:19,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 2.625) internal successors, (105), 37 states have internal predecessors, (105), 33 states have call successors, (34), 2 states have call predecessors, (34), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 17:08:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 265 transitions. [2021-05-02 17:08:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 17:08:19,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:08:19,621 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:08:19,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-02 17:08:19,837 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:08:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:08:19,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1967800550, now seen corresponding path program 31 times [2021-05-02 17:08:19,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:08:19,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242684798] [2021-05-02 17:08:19,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:08:19,841 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:08:19,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1237309959] [2021-05-02 17:08:19,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:08:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:08:19,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 17:08:19,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:08:19,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:19,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:19,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:19,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:19,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:19,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:19,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:19,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:19,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:08:20,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:08:20,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242684798] [2021-05-02 17:08:20,830 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:08:20,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237309959] [2021-05-02 17:08:20,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237309959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:08:20,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:08:20,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2021-05-02 17:08:20,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141718449] [2021-05-02 17:08:20,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:08:20,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:08:20,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:08:20,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:08:20,832 INFO L87 Difference]: Start difference. First operand 263 states and 265 transitions. Second operand has 35 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 17:08:21,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:08:21,847 INFO L93 Difference]: Finished difference Result 274 states and 275 transitions. [2021-05-02 17:08:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 17:08:21,847 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 260 [2021-05-02 17:08:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:08:21,848 INFO L225 Difference]: With dead ends: 274 [2021-05-02 17:08:21,849 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 17:08:21,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1013.5ms TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 17:08:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 17:08:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-05-02 17:08:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 17:08:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 270 transitions. [2021-05-02 17:08:21,859 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 270 transitions. Word has length 260 [2021-05-02 17:08:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:08:21,860 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 270 transitions. [2021-05-02 17:08:21,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 5.542857142857143) internal successors, (194), 34 states have internal predecessors, (194), 34 states have call successors, (34), 34 states have call predecessors, (34), 32 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 17:08:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 270 transitions. [2021-05-02 17:08:21,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 17:08:21,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:08:21,861 INFO L523 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:08:22,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:08:22,077 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:08:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:08:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1795121404, now seen corresponding path program 31 times [2021-05-02 17:08:22,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:08:22,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841083888] [2021-05-02 17:08:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:08:22,081 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:08:22,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1079526759] [2021-05-02 17:08:22,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:08:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:08:23,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 147 conjunts are in the unsatisfiable core [2021-05-02 17:08:23,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:08:23,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:24,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 152 proven. 2076 refuted. 0 times theorem prover too weak. 1804 trivial. 0 not checked. [2021-05-02 17:08:24,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:08:24,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841083888] [2021-05-02 17:08:24,460 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:08:24,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079526759] [2021-05-02 17:08:24,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079526759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:08:24,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:08:24,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-05-02 17:08:24,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692457032] [2021-05-02 17:08:24,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 17:08:24,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:08:24,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 17:08:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:08:24,461 INFO L87 Difference]: Start difference. First operand 269 states and 270 transitions. Second operand has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 34 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 17:08:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:08:25,819 INFO L93 Difference]: Finished difference Result 276 states and 278 transitions. [2021-05-02 17:08:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 17:08:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 34 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 266 [2021-05-02 17:08:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:08:25,821 INFO L225 Difference]: With dead ends: 276 [2021-05-02 17:08:25,821 INFO L226 Difference]: Without dead ends: 271 [2021-05-02 17:08:25,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 842.8ms TimeCoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 17:08:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-05-02 17:08:25,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2021-05-02 17:08:25,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 17:08:25,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2021-05-02 17:08:25,832 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 266 [2021-05-02 17:08:25,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:08:25,832 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2021-05-02 17:08:25,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 2.8421052631578947) internal successors, (108), 38 states have internal predecessors, (108), 34 states have call successors, (35), 2 states have call predecessors, (35), 2 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 17:08:25,832 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2021-05-02 17:08:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-02 17:08:25,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:08:25,833 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:08:26,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:08:26,035 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:08:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:08:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2133154263, now seen corresponding path program 32 times [2021-05-02 17:08:26,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:08:26,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476737184] [2021-05-02 17:08:26,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:08:26,039 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:08:26,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1072245162] [2021-05-02 17:08:26,039 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:08:26,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:08:26,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:08:26,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 17:08:26,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:08:26,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:26,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:27,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:27,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:27,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:27,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:27,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:08:27,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:08:27,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476737184] [2021-05-02 17:08:27,078 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:08:27,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072245162] [2021-05-02 17:08:27,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072245162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:08:27,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:08:27,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2021-05-02 17:08:27,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612387030] [2021-05-02 17:08:27,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:08:27,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:08:27,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:08:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:08:27,079 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 35 states have internal predecessors, (200), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 17:08:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:08:28,225 INFO L93 Difference]: Finished difference Result 282 states and 283 transitions. [2021-05-02 17:08:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 17:08:28,226 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 35 states have internal predecessors, (200), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) Word has length 268 [2021-05-02 17:08:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:08:28,227 INFO L225 Difference]: With dead ends: 282 [2021-05-02 17:08:28,227 INFO L226 Difference]: Without dead ends: 277 [2021-05-02 17:08:28,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1140.1ms TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 17:08:28,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-02 17:08:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2021-05-02 17:08:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 36 states have call successors, (36), 36 states have call predecessors, (36), 34 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 17:08:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2021-05-02 17:08:28,237 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 268 [2021-05-02 17:08:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:08:28,237 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2021-05-02 17:08:28,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 5.555555555555555) internal successors, (200), 35 states have internal predecessors, (200), 35 states have call successors, (35), 35 states have call predecessors, (35), 33 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-05-02 17:08:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2021-05-02 17:08:28,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-02 17:08:28,238 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:08:28,238 INFO L523 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:08:28,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-02 17:08:28,458 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:08:28,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:08:28,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1647494663, now seen corresponding path program 32 times [2021-05-02 17:08:28,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:08:28,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791331899] [2021-05-02 17:08:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:08:28,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:08:28,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696914503] [2021-05-02 17:08:28,463 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:08:29,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:08:29,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:08:29,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 144 conjunts are in the unsatisfiable core [2021-05-02 17:08:29,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:08:29,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:08:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4290 backedges. 65 proven. 2209 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2021-05-02 17:08:30,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:08:30,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791331899] [2021-05-02 17:08:30,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:08:30,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696914503] [2021-05-02 17:08:30,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696914503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:08:30,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:08:30,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-05-02 17:08:30,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773909059] [2021-05-02 17:08:30,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 17:08:30,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:08:30,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 17:08:30,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:08:30,502 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 40 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 35 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 17:08:31,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:08:31,918 INFO L93 Difference]: Finished difference Result 284 states and 286 transitions. [2021-05-02 17:08:31,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:08:31,919 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 35 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 274 [2021-05-02 17:08:31,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:08:31,920 INFO L225 Difference]: With dead ends: 284 [2021-05-02 17:08:31,920 INFO L226 Difference]: Without dead ends: 279 [2021-05-02 17:08:31,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 842.3ms TimeCoverageRelationStatistics Valid=93, Invalid=1713, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:08:31,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-05-02 17:08:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2021-05-02 17:08:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 17:08:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2021-05-02 17:08:31,928 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 274 [2021-05-02 17:08:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:08:31,928 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2021-05-02 17:08:31,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 2.8461538461538463) internal successors, (111), 39 states have internal predecessors, (111), 35 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 17:08:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2021-05-02 17:08:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-02 17:08:31,929 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:08:31,929 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:08:32,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-02 17:08:32,136 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:08:32,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:08:32,137 INFO L82 PathProgramCache]: Analyzing trace with hash -903931796, now seen corresponding path program 33 times [2021-05-02 17:08:32,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:08:32,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087568295] [2021-05-02 17:08:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:08:32,141 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:08:32,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950147161] [2021-05-02 17:08:32,141 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true