/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/loop-acceleration/array_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:04:19,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:04:19,521 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:04:19,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:04:19,554 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:04:19,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:04:19,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:04:19,557 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:04:19,558 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:04:19,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:04:19,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:04:19,561 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:04:19,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:04:19,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:04:19,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:04:19,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:04:19,567 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:04:19,574 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:04:19,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:04:19,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:04:19,576 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 12:04:19,601 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:04:19,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:04:19,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:04:19,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:04:19,603 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:04:19,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:04:19,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:04:19,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:04:19,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:04:19,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:04:19,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:04:19,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:04:19,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:04:19,604 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:04:19,605 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:04:19,605 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:04:19,605 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:04:19,605 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:04:19,606 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:04:19,606 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:04:19,606 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:04:19,606 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:04:19,606 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:04:19,607 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:04:19,607 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:04:19,607 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:04:19,607 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:04:19,608 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:04:19,608 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:04:19,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:04:19,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:04:19,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:04:19,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:04:19,944 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:04:19,945 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-1.c [2021-05-02 12:04:20,010 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7b9ccd7/cb024607189449b1a03e60ba2018f0be/FLAG8cb5452f1 [2021-05-02 12:04:20,442 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:04:20,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c [2021-05-02 12:04:20,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7b9ccd7/cb024607189449b1a03e60ba2018f0be/FLAG8cb5452f1 [2021-05-02 12:04:20,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad7b9ccd7/cb024607189449b1a03e60ba2018f0be [2021-05-02 12:04:20,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:04:20,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:04:20,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:20,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:04:20,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:04:20,841 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b3357d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:20, skipping insertion in model container [2021-05-02 12:04:20,843 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:20" (1/1) ... [2021-05-02 12:04:20,849 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:04:20,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:04:20,981 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c[321,334] [2021-05-02 12:04:20,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:20,996 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:04:21,012 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-1.c[321,334] [2021-05-02 12:04:21,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:21,050 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:04:21,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21 WrapperNode [2021-05-02 12:04:21,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:21,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:04:21,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:04:21,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:04:21,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (1/1) ... [2021-05-02 12:04:21,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (1/1) ... [2021-05-02 12:04:21,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (1/1) ... [2021-05-02 12:04:21,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (1/1) ... [2021-05-02 12:04:21,098 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (1/1) ... [2021-05-02 12:04:21,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (1/1) ... [2021-05-02 12:04:21,103 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (1/1) ... [2021-05-02 12:04:21,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:04:21,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:04:21,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:04:21,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:04:21,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (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 12:04:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:04:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:04:21,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:04:21,205 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:04:21,205 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:04:21,205 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:04:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:04:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:04:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:04:21,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:04:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:04:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:04:21,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:04:21,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:04:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:04:21,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:04:21,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:04:21,461 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:04:21,462 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:04:21,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:21 BoogieIcfgContainer [2021-05-02 12:04:21,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:04:21,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:04:21,465 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:04:21,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:04:21,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:04:20" (1/3) ... [2021-05-02 12:04:21,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d8eff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:21, skipping insertion in model container [2021-05-02 12:04:21,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:21" (2/3) ... [2021-05-02 12:04:21,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d8eff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:21, skipping insertion in model container [2021-05-02 12:04:21,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:21" (3/3) ... [2021-05-02 12:04:21,485 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-1.c [2021-05-02 12:04:21,490 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:04:21,493 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:04:21,531 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:04:21,550 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:04:21,551 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:04:21,551 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:04:21,551 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:04:21,551 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:04:21,551 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:04:21,551 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:04:21,551 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:04:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:04:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:04:21,569 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:21,569 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:21,570 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:21,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:21,574 INFO L82 PathProgramCache]: Analyzing trace with hash 2003232087, now seen corresponding path program 1 times [2021-05-02 12:04:21,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:21,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385310858] [2021-05-02 12:04:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:21,799 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 12:04:21,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:21,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385310858] [2021-05-02 12:04:21,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385310858] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:21,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:21,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:04:21,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460274518] [2021-05-02 12:04:21,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:04:21,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:21,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:04:21,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:21,819 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12:04:21,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:21,883 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 12:04:21,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:04:21,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12 [2021-05-02 12:04:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:21,891 INFO L225 Difference]: With dead ends: 34 [2021-05-02 12:04:21,891 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 12:04:21,897 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 12:04:21,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 12:04:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 12:04:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 12:04:21,930 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 12:04:21,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:21,930 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 12:04:21,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 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 12:04:21,931 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 12:04:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:04:21,931 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:21,932 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:21,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:04:21,932 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:21,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1831457181, now seen corresponding path program 1 times [2021-05-02 12:04:21,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:21,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441421023] [2021-05-02 12:04:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,071 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 12:04:22,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:22,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441421023] [2021-05-02 12:04:22,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441421023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:22,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:22,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:04:22,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943926479] [2021-05-02 12:04:22,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:04:22,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:22,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:04:22,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:22,079 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 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 12:04:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:22,117 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 12:04:22,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:04:22,118 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), 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 12 [2021-05-02 12:04:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:22,119 INFO L225 Difference]: With dead ends: 22 [2021-05-02 12:04:22,119 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 12:04:22,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:22,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 12:04:22,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 12:04:22,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 12:04:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 12:04:22,129 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 12:04:22,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:22,129 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 12:04:22,129 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), 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 12:04:22,129 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 12:04:22,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:04:22,130 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:22,130 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:22,130 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:04:22,131 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:22,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:22,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1746962049, now seen corresponding path program 1 times [2021-05-02 12:04:22,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:22,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496406655] [2021-05-02 12:04:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:22,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:22,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496406655] [2021-05-02 12:04:22,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496406655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:22,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209343706] [2021-05-02 12:04:22,234 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 12:04:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 12:04:22,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:22,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:22,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209343706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:22,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:22,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 12:04:22,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782066537] [2021-05-02 12:04:22,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:04:22,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:22,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:04:22,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:22,411 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:22,463 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 12:04:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:04:22,464 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 12:04:22,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:22,465 INFO L225 Difference]: With dead ends: 24 [2021-05-02 12:04:22,465 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 12:04:22,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:22,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 12:04:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 12:04:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 12:04:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 12:04:22,473 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 12:04:22,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:22,473 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 12:04:22,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 12:04:22,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 12:04:22,474 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:22,474 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:22,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 12:04:22,698 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash -339037983, now seen corresponding path program 2 times [2021-05-02 12:04:22,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:22,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740142973] [2021-05-02 12:04:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:22,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:22,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740142973] [2021-05-02 12:04:22,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740142973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:22,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91435914] [2021-05-02 12:04:22,830 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 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 12:04:22,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:22,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:22,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 12:04:22,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:22,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:22,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91435914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:23,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 12:04:23,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38970111] [2021-05-02 12:04:23,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:04:23,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:23,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:04:23,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:04:23,007 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:23,056 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 12:04:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 12:04:23,057 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 12:04:23,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:23,059 INFO L225 Difference]: With dead ends: 26 [2021-05-02 12:04:23,059 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 12:04:23,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:04:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 12:04:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 12:04:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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 12:04:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 12:04:23,068 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 12:04:23,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:23,068 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 12:04:23,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 12:04:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 12:04:23,069 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:23,070 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:23,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:23,285 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:23,285 INFO L82 PathProgramCache]: Analyzing trace with hash -238708797, now seen corresponding path program 3 times [2021-05-02 12:04:23,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:23,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752182824] [2021-05-02 12:04:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:23,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:23,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752182824] [2021-05-02 12:04:23,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752182824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595485451] [2021-05-02 12:04:23,350 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 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 12:04:23,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 12:04:23,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:23,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:04:23,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:23,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595485451] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:23,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 12:04:23,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628949787] [2021-05-02 12:04:23,443 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:04:23,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:23,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:04:23,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:23,444 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:23,482 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 12:04:23,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:04:23,482 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 12:04:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:23,483 INFO L225 Difference]: With dead ends: 28 [2021-05-02 12:04:23,483 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 12:04:23,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 37.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:23,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 12:04:23,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 12:04:23,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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 12:04:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 12:04:23,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 12:04:23,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:23,488 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 12:04:23,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:23,488 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 12:04:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 12:04:23,488 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:23,489 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:23,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:23,713 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:23,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:23,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1688358437, now seen corresponding path program 4 times [2021-05-02 12:04:23,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:23,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770071175] [2021-05-02 12:04:23,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:23,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:23,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770071175] [2021-05-02 12:04:23,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770071175] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724559898] [2021-05-02 12:04:23,806 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 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 12:04:23,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:23,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:23,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 12:04:23,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:23,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:23,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724559898] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:23,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:23,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 12:04:23,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711751175] [2021-05-02 12:04:23,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 12:04:23,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:23,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 12:04:23,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:04:23,941 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:24,000 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 12:04:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:04:24,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 12:04:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:24,002 INFO L225 Difference]: With dead ends: 30 [2021-05-02 12:04:24,003 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 12:04:24,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:04:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 12:04:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 12:04:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 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 12:04:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 12:04:24,012 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 12:04:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:24,013 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 12:04:24,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,013 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 12:04:24,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 12:04:24,013 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:24,013 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:24,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:24,237 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:24,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1825901561, now seen corresponding path program 5 times [2021-05-02 12:04:24,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:24,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318561277] [2021-05-02 12:04:24,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:24,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:24,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318561277] [2021-05-02 12:04:24,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318561277] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:24,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189864477] [2021-05-02 12:04:24,366 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 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 12:04:24,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 12:04:24,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:24,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:04:24,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:24,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:24,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189864477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:24,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:24,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 12:04:24,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248452676] [2021-05-02 12:04:24,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:04:24,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:24,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:04:24,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:24,543 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:24,602 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 12:04:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:04:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 12:04:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:24,604 INFO L225 Difference]: With dead ends: 32 [2021-05-02 12:04:24,604 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 12:04:24,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 12:04:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 12:04:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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 12:04:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 12:04:24,608 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 12:04:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:24,609 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 12:04:24,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 12:04:24,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 12:04:24,610 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:24,610 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:24,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 12:04:24,834 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:24,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:24,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1109502313, now seen corresponding path program 6 times [2021-05-02 12:04:24,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:24,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703806388] [2021-05-02 12:04:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:24,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:24,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703806388] [2021-05-02 12:04:24,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703806388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:24,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390074138] [2021-05-02 12:04:24,960 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 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 12:04:25,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 12:04:25,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:25,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 12:04:25,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:25,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,107 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:25,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390074138] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:25,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:25,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 12:04:25,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563743090] [2021-05-02 12:04:25,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:04:25,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:25,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:04:25,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:25,109 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:25,200 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 12:04:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:04:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 12:04:25,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:25,201 INFO L225 Difference]: With dead ends: 34 [2021-05-02 12:04:25,201 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 12:04:25,201 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:25,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 12:04:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 12:04:25,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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 12:04:25,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 12:04:25,205 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 12:04:25,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:25,205 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 12:04:25,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,206 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 12:04:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 12:04:25,206 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:25,206 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:25,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:25,421 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:25,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:25,421 INFO L82 PathProgramCache]: Analyzing trace with hash 239111755, now seen corresponding path program 7 times [2021-05-02 12:04:25,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:25,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676448452] [2021-05-02 12:04:25,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:25,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:25,572 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:25,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:25,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676448452] [2021-05-02 12:04:25,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676448452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:25,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188557065] [2021-05-02 12:04:25,573 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 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 12:04:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:25,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:04:25,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:25,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:25,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188557065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:25,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:25,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 12:04:25,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866610345] [2021-05-02 12:04:25,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:04:25,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:25,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:04:25,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:04:25,765 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:25,822 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 12:04:25,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:04:25,822 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 12:04:25,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:25,823 INFO L225 Difference]: With dead ends: 36 [2021-05-02 12:04:25,823 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 12:04:25,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:04:25,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 12:04:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 12:04:25,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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 12:04:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 12:04:25,827 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 12:04:25,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:25,827 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 12:04:25,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:25,828 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 12:04:25,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 12:04:25,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:25,828 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:26,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:26,051 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:26,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1312408237, now seen corresponding path program 8 times [2021-05-02 12:04:26,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:26,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407624432] [2021-05-02 12:04:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:26,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:26,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:26,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407624432] [2021-05-02 12:04:26,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407624432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:26,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719731234] [2021-05-02 12:04:26,179 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 12:04:26,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:26,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:26,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:04:26,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:26,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:26,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719731234] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:26,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:26,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-02 12:04:26,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035655809] [2021-05-02 12:04:26,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 12:04:26,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:26,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 12:04:26,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:26,321 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:26,387 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 12:04:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 12:04:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 12:04:26,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:26,388 INFO L225 Difference]: With dead ends: 38 [2021-05-02 12:04:26,388 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 12:04:26,389 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:04:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 12:04:26,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 12:04:26,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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 12:04:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 12:04:26,393 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 12:04:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:26,393 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 12:04:26,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:26,393 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 12:04:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 12:04:26,394 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:26,394 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:26,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 12:04:26,613 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:26,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:26,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1958176399, now seen corresponding path program 9 times [2021-05-02 12:04:26,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:26,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775807188] [2021-05-02 12:04:26,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:26,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:26,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:26,745 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:26,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:26,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775807188] [2021-05-02 12:04:26,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775807188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478285943] [2021-05-02 12:04:26,749 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 12:04:26,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 12:04:26,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:26,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 12:04:26,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:26,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:26,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478285943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:26,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:26,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 12:04:26,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102186531] [2021-05-02 12:04:26,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:04:26,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:26,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:04:26,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:04:26,954 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:27,024 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 12:04:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 12:04:27,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 12:04:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:27,026 INFO L225 Difference]: With dead ends: 40 [2021-05-02 12:04:27,026 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 12:04:27,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:04:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 12:04:27,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 12:04:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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 12:04:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 12:04:27,038 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 12:04:27,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:27,038 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 12:04:27,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,038 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 12:04:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 12:04:27,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:27,043 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:27,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:27,261 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:27,261 INFO L82 PathProgramCache]: Analyzing trace with hash -228877839, now seen corresponding path program 10 times [2021-05-02 12:04:27,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:27,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152622624] [2021-05-02 12:04:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:27,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:27,412 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:27,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:27,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152622624] [2021-05-02 12:04:27,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152622624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:27,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693117469] [2021-05-02 12:04:27,413 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 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 12:04:27,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:27,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:27,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 12:04:27,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:27,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:27,575 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:27,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693117469] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:27,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:27,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 12:04:27,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842070407] [2021-05-02 12:04:27,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 12:04:27,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:27,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 12:04:27,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:04:27,577 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:27,661 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 12:04:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 12:04:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 12:04:27,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:27,665 INFO L225 Difference]: With dead ends: 42 [2021-05-02 12:04:27,665 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 12:04:27,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:04:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 12:04:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 12:04:27,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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 12:04:27,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 12:04:27,682 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 12:04:27,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:27,682 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 12:04:27,682 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 12:04:27,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 12:04:27,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:27,683 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:27,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:27,884 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:27,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1748992813, now seen corresponding path program 11 times [2021-05-02 12:04:27,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:27,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695579047] [2021-05-02 12:04:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:28,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:28,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:28,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:28,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695579047] [2021-05-02 12:04:28,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695579047] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:28,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040269415] [2021-05-02 12:04:28,042 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 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 12:04:28,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-05-02 12:04:28,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:28,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 12:04:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:28,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:28,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040269415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:28,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:28,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 12:04:28,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677848058] [2021-05-02 12:04:28,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 12:04:28,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:28,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 12:04:28,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:04:28,224 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:28,295 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 12:04:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 12:04:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 12:04:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:28,296 INFO L225 Difference]: With dead ends: 44 [2021-05-02 12:04:28,296 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 12:04:28,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 113.8ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:04:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 12:04:28,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 12:04:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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 12:04:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 12:04:28,300 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 12:04:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:28,300 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 12:04:28,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 15 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 12:04:28,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 12:04:28,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:28,300 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:28,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 12:04:28,521 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2004365109, now seen corresponding path program 12 times [2021-05-02 12:04:28,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:28,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831596546] [2021-05-02 12:04:28,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:28,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:28,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:28,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831596546] [2021-05-02 12:04:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831596546] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:28,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875553156] [2021-05-02 12:04:28,704 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 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 12:04:28,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-05-02 12:04:28,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:28,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 12:04:28,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:28,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:28,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875553156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:28,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:28,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-05-02 12:04:28,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933803364] [2021-05-02 12:04:28,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:04:28,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:28,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:04:28,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:28,950 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:29,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:29,015 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 12:04:29,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 12:04:29,015 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 12:04:29,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:29,015 INFO L225 Difference]: With dead ends: 46 [2021-05-02 12:04:29,016 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 12:04:29,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:04:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 12:04:29,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 12:04:29,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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 12:04:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 12:04:29,018 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 12:04:29,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:29,019 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 12:04:29,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 12:04:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 12:04:29,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:29,019 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:29,225 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 12:04:29,225 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:29,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1208799511, now seen corresponding path program 13 times [2021-05-02 12:04:29,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:29,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192475998] [2021-05-02 12:04:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:29,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:29,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:29,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192475998] [2021-05-02 12:04:29,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192475998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:29,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435472125] [2021-05-02 12:04:29,386 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 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 12:04:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 12:04:29,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:29,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:29,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435472125] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:29,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:29,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 12:04:29,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686250085] [2021-05-02 12:04:29,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 12:04:29,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:29,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 12:04:29,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:04:29,548 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:29,604 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 12:04:29,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 12:04:29,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 12:04:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:29,605 INFO L225 Difference]: With dead ends: 48 [2021-05-02 12:04:29,605 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 12:04:29,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:04:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 12:04:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 12:04:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 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 12:04:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 12:04:29,608 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 12:04:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:29,609 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 12:04:29,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 12:04:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 12:04:29,609 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:29,609 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:29,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 12:04:29,825 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:29,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:29,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1174438521, now seen corresponding path program 14 times [2021-05-02 12:04:29,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:29,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631754090] [2021-05-02 12:04:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:30,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:30,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:30,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631754090] [2021-05-02 12:04:30,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631754090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:30,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729844466] [2021-05-02 12:04:30,031 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 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 12:04:30,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:30,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:30,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 12:04:30,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:30,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:30,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729844466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:30,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:30,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 12:04:30,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391045987] [2021-05-02 12:04:30,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 12:04:30,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:30,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 12:04:30,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:30,179 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:30,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:30,260 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 12:04:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 12:04:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 12:04:30,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:30,261 INFO L225 Difference]: With dead ends: 50 [2021-05-02 12:04:30,261 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 12:04:30,261 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:04:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 12:04:30,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 12:04:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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 12:04:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 12:04:30,264 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 12:04:30,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:30,264 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 12:04:30,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:30,265 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 12:04:30,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 12:04:30,265 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:30,265 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:30,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:30,469 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:30,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1781701797, now seen corresponding path program 15 times [2021-05-02 12:04:30,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:30,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741354492] [2021-05-02 12:04:30,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:30,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:30,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:30,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741354492] [2021-05-02 12:04:30,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741354492] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:30,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396944744] [2021-05-02 12:04:30,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:30,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-05-02 12:04:30,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:30,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 12:04:30,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:30,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:30,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396944744] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:30,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:30,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-05-02 12:04:30,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123874358] [2021-05-02 12:04:30,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 12:04:30,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:30,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 12:04:30,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:04:30,990 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:31,060 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 12:04:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 12:04:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 12:04:31,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:31,061 INFO L225 Difference]: With dead ends: 52 [2021-05-02 12:04:31,061 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 12:04:31,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:04:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 12:04:31,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 12:04:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 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 12:04:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 12:04:31,066 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 12:04:31,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:31,066 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 12:04:31,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 12:04:31,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 12:04:31,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:31,067 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:31,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 12:04:31,291 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:31,291 INFO L82 PathProgramCache]: Analyzing trace with hash 635802557, now seen corresponding path program 16 times [2021-05-02 12:04:31,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:31,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094130983] [2021-05-02 12:04:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:31,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:31,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:31,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:31,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094130983] [2021-05-02 12:04:31,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094130983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:31,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509542452] [2021-05-02 12:04:31,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:31,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:31,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:31,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 12:04:31,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:31,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:31,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509542452] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:31,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:31,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-02 12:04:31,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650067801] [2021-05-02 12:04:31,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 12:04:31,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:31,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 12:04:31,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 12:04:31,705 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:31,788 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 12:04:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 12:04:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 12:04:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:31,789 INFO L225 Difference]: With dead ends: 54 [2021-05-02 12:04:31,789 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 12:04:31,790 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 12:04:31,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 12:04:31,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 12:04:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 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 12:04:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 12:04:31,800 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 12:04:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:31,801 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 12:04:31,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 12:04:31,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 12:04:31,803 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:31,803 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:32,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 12:04:32,027 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:32,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:32,027 INFO L82 PathProgramCache]: Analyzing trace with hash 280179615, now seen corresponding path program 17 times [2021-05-02 12:04:32,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:32,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196687064] [2021-05-02 12:04:32,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:32,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:32,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:32,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196687064] [2021-05-02 12:04:32,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196687064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:32,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003716558] [2021-05-02 12:04:32,255 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 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 12:04:32,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 12:04:32,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:32,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:04:32,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:32,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:32,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003716558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:32,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:32,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 12:04:32,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532219542] [2021-05-02 12:04:32,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 12:04:32,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:32,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 12:04:32,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:04:32,482 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:32,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:32,578 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 12:04:32,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 12:04:32,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 12:04:32,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:32,580 INFO L225 Difference]: With dead ends: 56 [2021-05-02 12:04:32,580 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 12:04:32,580 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:04:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 12:04:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 12:04:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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 12:04:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 12:04:32,583 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 12:04:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:32,583 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 12:04:32,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 12:04:32,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 12:04:32,583 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:32,583 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:32,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:32,785 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:32,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:32,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2123916033, now seen corresponding path program 18 times [2021-05-02 12:04:32,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:32,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296277055] [2021-05-02 12:04:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:33,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:33,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:33,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296277055] [2021-05-02 12:04:33,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296277055] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:33,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161635302] [2021-05-02 12:04:33,016 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 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 12:04:33,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-05-02 12:04:33,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:33,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 12:04:33,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:33,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:33,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161635302] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:33,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:33,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2021-05-02 12:04:33,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951741185] [2021-05-02 12:04:33,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 12:04:33,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 12:04:33,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:33,577 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:33,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:33,675 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 12:04:33,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 12:04:33,676 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 12:04:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:33,676 INFO L225 Difference]: With dead ends: 58 [2021-05-02 12:04:33,676 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 12:04:33,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 12:04:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 12:04:33,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 12:04:33,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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 12:04:33,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 12:04:33,681 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 12:04:33,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:33,681 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 12:04:33,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:33,681 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 12:04:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 12:04:33,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:33,682 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:33,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:33,885 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:33,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:33,885 INFO L82 PathProgramCache]: Analyzing trace with hash 133120483, now seen corresponding path program 19 times [2021-05-02 12:04:33,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:33,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675264128] [2021-05-02 12:04:33,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:34,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:34,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675264128] [2021-05-02 12:04:34,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675264128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:34,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270948626] [2021-05-02 12:04:34,127 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 12:04:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 12:04:34,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:34,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,280 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:34,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270948626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:34,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:34,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 12:04:34,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002231672] [2021-05-02 12:04:34,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 12:04:34,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:34,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 12:04:34,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:04:34,282 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:34,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:34,350 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 12:04:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 12:04:34,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 12:04:34,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:34,351 INFO L225 Difference]: With dead ends: 60 [2021-05-02 12:04:34,351 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 12:04:34,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:04:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 12:04:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 12:04:34,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 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 12:04:34,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 12:04:34,354 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 12:04:34,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:34,354 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 12:04:34,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 12:04:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 12:04:34,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:34,355 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:34,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:34,573 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:34,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1760956347, now seen corresponding path program 20 times [2021-05-02 12:04:34,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:34,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198582648] [2021-05-02 12:04:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:34,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:34,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:34,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198582648] [2021-05-02 12:04:34,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198582648] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:34,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249108951] [2021-05-02 12:04:34,869 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 12:04:34,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:34,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:34,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 12:04:34,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:34,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:34,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:35,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249108951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:35,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:35,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 12:04:35,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770394806] [2021-05-02 12:04:35,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 12:04:35,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:35,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 12:04:35,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:35,057 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:35,168 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 12:04:35,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 12:04:35,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 12:04:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:35,170 INFO L225 Difference]: With dead ends: 62 [2021-05-02 12:04:35,170 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 12:04:35,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 12:04:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 12:04:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 12:04:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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 12:04:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 12:04:35,172 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 12:04:35,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:35,172 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 12:04:35,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:35,173 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 12:04:35,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 12:04:35,173 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:35,173 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:35,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 12:04:35,387 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:35,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:35,387 INFO L82 PathProgramCache]: Analyzing trace with hash -902656473, now seen corresponding path program 21 times [2021-05-02 12:04:35,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:35,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873842033] [2021-05-02 12:04:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:35,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:35,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:35,705 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:35,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:35,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873842033] [2021-05-02 12:04:35,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873842033] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:35,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699128234] [2021-05-02 12:04:35,705 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 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 12:04:36,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 12:04:36,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:36,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 12:04:36,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:36,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:36,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699128234] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:36,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:36,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2021-05-02 12:04:36,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802620722] [2021-05-02 12:04:36,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 12:04:36,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:36,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 12:04:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:04:36,167 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:36,240 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 12:04:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 12:04:36,241 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 12:04:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:36,241 INFO L225 Difference]: With dead ends: 64 [2021-05-02 12:04:36,241 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 12:04:36,242 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 12:04:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 12:04:36,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 12:04:36,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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 12:04:36,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 12:04:36,244 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 12:04:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:36,244 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 12:04:36,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 25 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:36,245 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 12:04:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 12:04:36,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:36,245 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:36,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 12:04:36,469 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:36,469 INFO L82 PathProgramCache]: Analyzing trace with hash -710198391, now seen corresponding path program 22 times [2021-05-02 12:04:36,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:36,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912961952] [2021-05-02 12:04:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:36,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:36,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:36,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912961952] [2021-05-02 12:04:36,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912961952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:36,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300913041] [2021-05-02 12:04:36,782 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 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 12:04:36,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:36,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:36,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 12:04:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:36,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:36,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300913041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:36,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:36,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2021-05-02 12:04:36,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652564815] [2021-05-02 12:04:36,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 12:04:36,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:36,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 12:04:36,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 12:04:36,963 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:37,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:37,065 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 12:04:37,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 12:04:37,066 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 12:04:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:37,066 INFO L225 Difference]: With dead ends: 66 [2021-05-02 12:04:37,066 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 12:04:37,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 12:04:37,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 12:04:37,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 12:04:37,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 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 12:04:37,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 12:04:37,069 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 12:04:37,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:37,069 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 12:04:37,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 26 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:37,069 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 12:04:37,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 12:04:37,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:37,070 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:37,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:37,281 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:37,281 INFO L82 PathProgramCache]: Analyzing trace with hash -441575317, now seen corresponding path program 23 times [2021-05-02 12:04:37,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:37,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192195620] [2021-05-02 12:04:37,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:37,600 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:37,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:37,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192195620] [2021-05-02 12:04:37,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192195620] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:37,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142565762] [2021-05-02 12:04:37,601 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 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 12:04:37,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-05-02 12:04:37,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 12:04:37,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:37,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:37,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142565762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:37,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:37,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 12:04:37,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894387177] [2021-05-02 12:04:37,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 12:04:37,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:37,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 12:04:37,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:04:37,965 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:38,076 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 12:04:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 12:04:38,076 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 12:04:38,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:38,077 INFO L225 Difference]: With dead ends: 68 [2021-05-02 12:04:38,077 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 12:04:38,078 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 12:04:38,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 12:04:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 12:04:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 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 12:04:38,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 12:04:38,081 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 12:04:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:38,081 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 12:04:38,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 27 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 12:04:38,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 12:04:38,081 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:38,081 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:38,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 12:04:38,306 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 7161037, now seen corresponding path program 24 times [2021-05-02 12:04:38,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:38,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517992082] [2021-05-02 12:04:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:38,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:38,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517992082] [2021-05-02 12:04:38,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517992082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:38,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714651314] [2021-05-02 12:04:38,672 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 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 12:04:40,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 12:04:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:40,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 12:04:40,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:40,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:40,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:41,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714651314] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:41,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2021-05-02 12:04:41,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173734659] [2021-05-02 12:04:41,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 12:04:41,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:41,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 12:04:41,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:41,078 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:41,215 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 12:04:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 12:04:41,216 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 12:04:41,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:41,217 INFO L225 Difference]: With dead ends: 70 [2021-05-02 12:04:41,217 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 12:04:41,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:04:41,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 12:04:41,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 12:04:41,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 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 12:04:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 12:04:41,219 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 12:04:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:41,219 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 12:04:41,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 12:04:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 12:04:41,220 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:41,220 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:41,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:41,421 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:41,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:41,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1746067631, now seen corresponding path program 25 times [2021-05-02 12:04:41,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:41,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672781331] [2021-05-02 12:04:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,810 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:41,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:41,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672781331] [2021-05-02 12:04:41,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672781331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167973233] [2021-05-02 12:04:41,811 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 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 12:04:41,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 12:04:41,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:41,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:41,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167973233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:41,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 12:04:41,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388750080] [2021-05-02 12:04:41,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 12:04:41,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:41,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 12:04:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:04:41,999 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:42,125 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 12:04:42,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 12:04:42,126 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 12:04:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:42,126 INFO L225 Difference]: With dead ends: 72 [2021-05-02 12:04:42,127 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 12:04:42,127 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 356.4ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 12:04:42,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 12:04:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 12:04:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 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 12:04:42,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 12:04:42,131 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 12:04:42,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:42,131 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 12:04:42,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 29 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:42,131 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 12:04:42,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 12:04:42,132 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:42,132 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:42,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-02 12:04:42,341 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:42,341 INFO L82 PathProgramCache]: Analyzing trace with hash 2093026321, now seen corresponding path program 26 times [2021-05-02 12:04:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:42,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699996606] [2021-05-02 12:04:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:42,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:42,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699996606] [2021-05-02 12:04:42,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699996606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926670713] [2021-05-02 12:04:42,741 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 12:04:42,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:42,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:42,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926670713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:42,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:42,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 12:04:42,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406004360] [2021-05-02 12:04:42,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 12:04:42,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:42,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 12:04:42,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:04:42,955 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:43,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:43,084 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 12:04:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 12:04:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 12:04:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:43,085 INFO L225 Difference]: With dead ends: 74 [2021-05-02 12:04:43,085 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 12:04:43,086 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 12:04:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 12:04:43,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 12:04:43,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 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 12:04:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 12:04:43,088 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 12:04:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:43,088 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 12:04:43,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 12:04:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 12:04:43,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:43,089 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:43,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 12:04:43,309 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:43,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:43,309 INFO L82 PathProgramCache]: Analyzing trace with hash 512878323, now seen corresponding path program 27 times [2021-05-02 12:04:43,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:43,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278603806] [2021-05-02 12:04:43,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:43,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:43,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:43,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278603806] [2021-05-02 12:04:43,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278603806] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:43,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788105755] [2021-05-02 12:04:43,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:44,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-05-02 12:04:44,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 12:04:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:44,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788105755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:44,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:44,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2021-05-02 12:04:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706976248] [2021-05-02 12:04:44,825 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 12:04:44,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:44,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 12:04:44,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:04:44,826 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:44,942 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 12:04:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 12:04:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 12:04:44,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:44,943 INFO L225 Difference]: With dead ends: 76 [2021-05-02 12:04:44,943 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 12:04:44,944 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 12:04:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 12:04:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 12:04:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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 12:04:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 12:04:44,947 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 12:04:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:44,947 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 12:04:44,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 31 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 12:04:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 12:04:44,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:44,948 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:45,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 12:04:45,161 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:45,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:45,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1885892267, now seen corresponding path program 28 times [2021-05-02 12:04:45,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:45,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253154545] [2021-05-02 12:04:45,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:45,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:45,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:45,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253154545] [2021-05-02 12:04:45,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253154545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:45,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947852447] [2021-05-02 12:04:45,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:45,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:04:45,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:45,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 12:04:45,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:45,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:45,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947852447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:45,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:45,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-02 12:04:45,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913466359] [2021-05-02 12:04:45,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 12:04:45,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:45,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 12:04:45,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 12:04:45,838 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:45,945 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 12:04:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 12:04:45,945 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-02 12:04:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:45,945 INFO L225 Difference]: With dead ends: 78 [2021-05-02 12:04:45,945 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 12:04:45,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 418.5ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 12:04:45,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 12:04:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 12:04:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 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 12:04:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 12:04:45,948 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 12:04:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:45,949 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 12:04:45,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 12:04:45,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 12:04:45,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:45,949 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:46,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:46,169 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash -706991305, now seen corresponding path program 29 times [2021-05-02 12:04:46,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:46,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43313660] [2021-05-02 12:04:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:46,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:46,625 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:46,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:46,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43313660] [2021-05-02 12:04:46,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43313660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:46,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682607670] [2021-05-02 12:04:46,626 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:47,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-05-02 12:04:47,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:47,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 12:04:47,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:47,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:47,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682607670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:47,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:47,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 12:04:47,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528210232] [2021-05-02 12:04:47,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 12:04:47,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:47,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 12:04:47,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:04:47,368 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:47,510 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 12:04:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 12:04:47,511 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 12:04:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:47,511 INFO L225 Difference]: With dead ends: 80 [2021-05-02 12:04:47,511 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 12:04:47,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 12:04:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 12:04:47,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 12:04:47,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 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 12:04:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 12:04:47,515 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 12:04:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:47,515 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 12:04:47,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 33 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:47,515 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 12:04:47,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 12:04:47,515 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:47,516 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:47,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-02 12:04:47,729 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:47,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:47,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1654532967, now seen corresponding path program 30 times [2021-05-02 12:04:47,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:47,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255645084] [2021-05-02 12:04:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:48,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:48,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255645084] [2021-05-02 12:04:48,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255645084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:48,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369990372] [2021-05-02 12:04:48,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:53,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 12:04:53,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:53,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 12:04:53,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:53,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369990372] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:53,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:53,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2021-05-02 12:04:53,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644624430] [2021-05-02 12:04:53,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 12:04:53,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:53,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 12:04:53,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:04:53,189 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:53,342 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 12:04:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 12:04:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 12:04:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:53,343 INFO L225 Difference]: With dead ends: 82 [2021-05-02 12:04:53,343 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 12:04:53,343 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 477.1ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:04:53,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 12:04:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 12:04:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 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 12:04:53,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 12:04:53,346 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 12:04:53,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:53,346 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 12:04:53,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:53,346 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 12:04:53,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 12:04:53,347 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:53,347 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:53,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:53,561 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1709003397, now seen corresponding path program 31 times [2021-05-02 12:04:53,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:53,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619655740] [2021-05-02 12:04:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:54,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:54,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:54,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619655740] [2021-05-02 12:04:54,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619655740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:54,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020151773] [2021-05-02 12:04:54,046 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 12:04:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:54,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 12:04:54,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:54,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:54,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020151773] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:54,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:54,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 12:04:54,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868406956] [2021-05-02 12:04:54,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 12:04:54,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:54,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 12:04:54,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:04:54,289 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:54,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:54,449 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 12:04:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 12:04:54,449 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 12:04:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:54,450 INFO L225 Difference]: With dead ends: 84 [2021-05-02 12:04:54,450 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 12:04:54,450 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 12:04:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 12:04:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 12:04:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 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 12:04:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 12:04:54,453 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 12:04:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:54,453 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 12:04:54,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 35 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 12:04:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 12:04:54,453 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:54,453 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:54,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 12:04:54,661 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:54,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:54,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1779488221, now seen corresponding path program 32 times [2021-05-02 12:04:54,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:54,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766373528] [2021-05-02 12:04:54,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:55,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:55,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:55,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766373528] [2021-05-02 12:04:55,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766373528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:55,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877675769] [2021-05-02 12:04:55,215 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 12:04:55,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:55,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:55,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 12:04:55,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:55,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:55,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877675769] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:55,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:55,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 12:04:55,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428679483] [2021-05-02 12:04:55,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 12:04:55,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:55,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 12:04:55,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:04:55,451 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:55,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:55,583 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 12:04:55,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 12:04:55,583 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 12:04:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:55,584 INFO L225 Difference]: With dead ends: 86 [2021-05-02 12:04:55,584 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 12:04:55,584 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 12:04:55,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 12:04:55,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 12:04:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 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 12:04:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 12:04:55,586 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 12:04:55,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:55,587 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 12:04:55,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.054054054054054) internal successors, (76), 36 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 12:04:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 12:04:55,587 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:55,587 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:55,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 12:04:55,793 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:55,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:55,794 INFO L82 PathProgramCache]: Analyzing trace with hash -149525057, now seen corresponding path program 33 times [2021-05-02 12:04:55,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:55,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600886737] [2021-05-02 12:04:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:56,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:56,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:56,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600886737] [2021-05-02 12:04:56,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600886737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:56,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183532414] [2021-05-02 12:04:56,342 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 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 12:05:16,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 12:05:16,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:16,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 12:05:16,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:16,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:16,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183532414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:16,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:16,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2021-05-02 12:05:16,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809878369] [2021-05-02 12:05:16,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 12:05:16,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 12:05:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:05:16,946 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:17,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:17,069 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 12:05:17,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 12:05:17,069 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 12:05:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:17,070 INFO L225 Difference]: With dead ends: 88 [2021-05-02 12:05:17,070 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 12:05:17,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 492.3ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 12:05:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 12:05:17,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 12:05:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 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 12:05:17,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 12:05:17,073 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 12:05:17,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:17,073 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 12:05:17,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 37 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 12:05:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 12:05:17,074 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:17,074 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:17,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 12:05:17,277 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:17,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1494586657, now seen corresponding path program 34 times [2021-05-02 12:05:17,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:17,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721551384] [2021-05-02 12:05:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:17,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:17,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721551384] [2021-05-02 12:05:17,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721551384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:17,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923143560] [2021-05-02 12:05:17,853 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 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 12:05:17,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:05:17,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:17,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 12:05:17,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:17,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:17,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:18,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923143560] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:18,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:18,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2021-05-02 12:05:18,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285520976] [2021-05-02 12:05:18,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 12:05:18,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:18,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 12:05:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 12:05:18,071 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:18,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:18,216 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 12:05:18,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 12:05:18,216 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-02 12:05:18,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:18,217 INFO L225 Difference]: With dead ends: 90 [2021-05-02 12:05:18,217 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 12:05:18,217 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 12:05:18,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 12:05:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 12:05:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 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 12:05:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 12:05:18,226 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 12:05:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:18,226 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 12:05:18,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.051282051282051) internal successors, (80), 38 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 12:05:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 12:05:18,226 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:18,226 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:18,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 12:05:18,428 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:18,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:18,428 INFO L82 PathProgramCache]: Analyzing trace with hash 937978883, now seen corresponding path program 35 times [2021-05-02 12:05:18,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:18,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532398173] [2021-05-02 12:05:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:19,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:19,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:19,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:19,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532398173] [2021-05-02 12:05:19,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532398173] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:19,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832661455] [2021-05-02 12:05:19,134 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 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 12:05:20,091 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-05-02 12:05:20,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 12:05:20,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:20,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:20,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832661455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:20,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:20,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 12:05:20,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216889224] [2021-05-02 12:05:20,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 12:05:20,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:20,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 12:05:20,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:05:20,273 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:20,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:20,439 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 12:05:20,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 12:05:20,440 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 12:05:20,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:20,440 INFO L225 Difference]: With dead ends: 92 [2021-05-02 12:05:20,440 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 12:05:20,441 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 12:05:20,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 12:05:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 12:05:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 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 12:05:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 12:05:20,443 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 12:05:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:20,443 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 12:05:20,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.05) internal successors, (82), 39 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 12:05:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 12:05:20,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:20,443 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:20,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 12:05:20,644 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:20,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:20,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1386147227, now seen corresponding path program 36 times [2021-05-02 12:05:20,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:20,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162434362] [2021-05-02 12:05:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:21,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:21,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:21,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162434362] [2021-05-02 12:05:21,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162434362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:21,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821562373] [2021-05-02 12:05:21,272 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 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 12:05:49,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-05-02 12:05:49,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 12:05:49,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:49,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:49,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:49,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821562373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:49,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:49,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 41 [2021-05-02 12:05:49,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017082851] [2021-05-02 12:05:49,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 12:05:49,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:49,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 12:05:49,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:49,901 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:50,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:50,044 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 12:05:50,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 12:05:50,045 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 12:05:50,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:50,045 INFO L225 Difference]: With dead ends: 94 [2021-05-02 12:05:50,045 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 12:05:50,046 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 12:05:50,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 12:05:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 12:05:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 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 12:05:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 12:05:50,048 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 12:05:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:50,048 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 12:05:50,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.048780487804878) internal successors, (84), 40 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:50,048 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 12:05:50,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 12:05:50,049 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:50,049 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:50,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 12:05:50,257 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:50,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:50,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1488345017, now seen corresponding path program 37 times [2021-05-02 12:05:50,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:50,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201491388] [2021-05-02 12:05:50,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:50,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:50,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:50,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201491388] [2021-05-02 12:05:50,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201491388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:50,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813753361] [2021-05-02 12:05:50,953 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 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 12:05:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:51,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 12:05:51,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:51,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:51,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813753361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:51,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:51,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2021-05-02 12:05:51,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449978851] [2021-05-02 12:05:51,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 12:05:51,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:51,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 12:05:51,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 12:05:51,160 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:51,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:51,311 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 12:05:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 12:05:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-02 12:05:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:51,312 INFO L225 Difference]: With dead ends: 96 [2021-05-02 12:05:51,312 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 12:05:51,313 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 654.7ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 12:05:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 12:05:51,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 12:05:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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 12:05:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 12:05:51,315 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 12:05:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:51,316 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 12:05:51,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 12:05:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 12:05:51,316 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:51,316 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:51,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 12:05:51,533 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:51,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:51,534 INFO L82 PathProgramCache]: Analyzing trace with hash -916173399, now seen corresponding path program 38 times [2021-05-02 12:05:51,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:51,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94957506] [2021-05-02 12:05:51,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:52,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:52,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:52,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94957506] [2021-05-02 12:05:52,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94957506] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:52,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34962400] [2021-05-02 12:05:52,242 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 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 12:05:52,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:05:52,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:05:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 12:05:52,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:05:52,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:05:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:52,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34962400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:52,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:05:52,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 12:05:52,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262043107] [2021-05-02 12:05:52,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 12:05:52,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:05:52,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 12:05:52,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:05:52,468 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:52,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:05:52,634 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 12:05:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 12:05:52,634 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 12:05:52,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:05:52,635 INFO L225 Difference]: With dead ends: 98 [2021-05-02 12:05:52,635 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 12:05:52,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:05:52,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 12:05:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 12:05:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 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 12:05:52,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 12:05:52,639 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 12:05:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:05:52,639 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 12:05:52,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.046511627906977) internal successors, (88), 42 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:05:52,639 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 12:05:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 12:05:52,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:05:52,640 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:05:52,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 12:05:52,853 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:05:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:05:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash -815062389, now seen corresponding path program 39 times [2021-05-02 12:05:52,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:05:52,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687949196] [2021-05-02 12:05:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:05:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:53,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:05:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:05:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:05:53,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:05:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687949196] [2021-05-02 12:05:53,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687949196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:05:53,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990027006] [2021-05-02 12:05:53,599 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 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 12:06:50,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-05-02 12:06:50,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:06:50,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 41 conjunts are in the unsatisfiable core [2021-05-02 12:06:50,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:50,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:50,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:06:50,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990027006] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:50,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:50,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 44 [2021-05-02 12:06:50,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660948402] [2021-05-02 12:06:50,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 12:06:50,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 12:06:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:06:50,542 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:50,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:50,744 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 12:06:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 12:06:50,745 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 12:06:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:50,745 INFO L225 Difference]: With dead ends: 100 [2021-05-02 12:06:50,745 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 12:06:50,746 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 12:06:50,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 12:06:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 12:06:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 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 12:06:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 12:06:50,749 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 12:06:50,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:50,749 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 12:06:50,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:50,749 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 12:06:50,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 12:06:50,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:50,750 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:50,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:50,977 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:50,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:50,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1863337709, now seen corresponding path program 40 times [2021-05-02 12:06:50,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:50,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670283168] [2021-05-02 12:06:50,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:51,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:06:51,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:51,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670283168] [2021-05-02 12:06:51,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670283168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:51,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886819801] [2021-05-02 12:06:51,736 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 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 12:06:51,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:06:51,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:06:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 12:06:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:06:51,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:06:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:06:51,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886819801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:51,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:06:51,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2021-05-02 12:06:51,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279489183] [2021-05-02 12:06:51,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 12:06:51,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:06:51,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 12:06:51,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 12:06:51,985 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:52,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:06:52,116 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 12:06:52,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 12:06:52,116 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-02 12:06:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:06:52,117 INFO L225 Difference]: With dead ends: 102 [2021-05-02 12:06:52,117 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 12:06:52,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 713.4ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 12:06:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 12:06:52,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 12:06:52,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 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 12:06:52,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 12:06:52,120 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 12:06:52,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:06:52,120 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 12:06:52,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 44 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:06:52,120 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 12:06:52,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 12:06:52,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:06:52,121 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:06:52,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:06:52,321 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:06:52,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:06:52,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1174545713, now seen corresponding path program 41 times [2021-05-02 12:06:52,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:06:52,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140689425] [2021-05-02 12:06:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:06:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:53,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:06:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:06:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:06:53,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:06:53,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140689425] [2021-05-02 12:06:53,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140689425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:06:53,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363254424] [2021-05-02 12:06:53,124 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 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 12:07:02,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 12:07:02,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:07:02,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 12:07:02,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:07:02,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:07:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:02,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363254424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:02,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:07:02,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 12:07:02,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586804501] [2021-05-02 12:07:02,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 12:07:02,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:07:02,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 12:07:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:07:02,356 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:07:02,528 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 12:07:02,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 12:07:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 12:07:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:07:02,529 INFO L225 Difference]: With dead ends: 104 [2021-05-02 12:07:02,529 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 12:07:02,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 737.0ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 12:07:02,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 12:07:02,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 12:07:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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 12:07:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 12:07:02,532 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 12:07:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:07:02,533 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 12:07:02,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 45 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:07:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 12:07:02,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 12:07:02,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:07:02,533 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:07:02,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 12:07:02,741 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:07:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:07:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2752975, now seen corresponding path program 42 times [2021-05-02 12:07:02,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:07:02,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769348091] [2021-05-02 12:07:02,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:07:02,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:03,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:07:03,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:07:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:07:03,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:07:03,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769348091] [2021-05-02 12:07:03,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769348091] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:07:03,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326700987] [2021-05-02 12:07:03,611 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 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 12:08:10,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-05-02 12:08:10,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:08:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 12:08:10,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:08:10,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:08:10,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326700987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:10,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:08:10,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45] total 47 [2021-05-02 12:08:10,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096815077] [2021-05-02 12:08:10,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 12:08:10,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:08:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 12:08:10,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:08:10,783 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:10,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:08:10,956 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 12:08:10,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 12:08:10,957 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 12:08:10,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:08:10,957 INFO L225 Difference]: With dead ends: 106 [2021-05-02 12:08:10,957 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 12:08:10,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 814.2ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 12:08:10,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 12:08:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 12:08:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 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 12:08:10,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 12:08:10,960 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 12:08:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:08:10,960 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 12:08:10,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0425531914893615) internal successors, (96), 46 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:10,961 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 12:08:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 12:08:10,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:08:10,961 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:08:11,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:08:11,185 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:08:11,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:08:11,185 INFO L82 PathProgramCache]: Analyzing trace with hash 808636691, now seen corresponding path program 43 times [2021-05-02 12:08:11,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:08:11,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860754689] [2021-05-02 12:08:11,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:08:11,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:12,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:08:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:08:12,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:08:12,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860754689] [2021-05-02 12:08:12,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860754689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:12,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985555020] [2021-05-02 12:08:12,054 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 12:08:12,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:12,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 12:08:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:08:12,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:12,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:08:12,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985555020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:12,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:08:12,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 12:08:12,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956111666] [2021-05-02 12:08:12,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 12:08:12,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:08:12,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 12:08:12,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:08:12,298 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:08:12,480 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 12:08:12,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 12:08:12,481 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 12:08:12,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:08:12,481 INFO L225 Difference]: With dead ends: 108 [2021-05-02 12:08:12,481 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 12:08:12,482 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 821.8ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 12:08:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 12:08:12,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 12:08:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 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 12:08:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 12:08:12,484 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 12:08:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:08:12,484 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 12:08:12,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0416666666666665) internal successors, (98), 47 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:12,484 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 12:08:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 12:08:12,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:08:12,485 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:08:12,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:08:12,697 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:08:12,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:08:12,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1129942155, now seen corresponding path program 44 times [2021-05-02 12:08:12,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:08:12,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075891590] [2021-05-02 12:08:12,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:08:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:13,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:08:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:08:13,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:08:13,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075891590] [2021-05-02 12:08:13,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075891590] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:13,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714009534] [2021-05-02 12:08:13,630 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 12:08:13,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:08:13,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:08:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 12:08:13,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:08:13,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:08:13,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:08:13,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714009534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:13,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:08:13,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 12:08:13,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297127586] [2021-05-02 12:08:13,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 12:08:13,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:08:13,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 12:08:13,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:08:13,894 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:14,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:08:14,109 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 12:08:14,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 12:08:14,109 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 12:08:14,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:08:14,110 INFO L225 Difference]: With dead ends: 110 [2021-05-02 12:08:14,110 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 12:08:14,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 870.6ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 12:08:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 12:08:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 12:08:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 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 12:08:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 12:08:14,113 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 12:08:14,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:08:14,113 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 12:08:14,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 48 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:08:14,114 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 12:08:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 12:08:14,114 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:08:14,114 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:08:14,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-02 12:08:14,329 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:08:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:08:14,329 INFO L82 PathProgramCache]: Analyzing trace with hash -88406697, now seen corresponding path program 45 times [2021-05-02 12:08:14,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:08:14,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92365728] [2021-05-02 12:08:14,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:08:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:15,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:08:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:08:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:08:15,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:08:15,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92365728] [2021-05-02 12:08:15,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92365728] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:08:15,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531833248] [2021-05-02 12:08:15,271 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 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 12:10:23,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 12:10:23,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:23,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 12:10:23,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:23,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:23,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:24,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:24,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531833248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:24,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:24,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 50 [2021-05-02 12:10:24,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210684818] [2021-05-02 12:10:24,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 12:10:24,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:24,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 12:10:24,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:10:24,151 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:24,315 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 12:10:24,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 12:10:24,316 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 12:10:24,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:24,317 INFO L225 Difference]: With dead ends: 112 [2021-05-02 12:10:24,317 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 12:10:24,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 892.7ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 12:10:24,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 12:10:24,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 12:10:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 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 12:10:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 12:10:24,320 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 12:10:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:24,320 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 12:10:24,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.04) internal successors, (102), 49 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 12:10:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 12:10:24,321 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:24,321 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:24,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 12:10:24,546 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash 99788473, now seen corresponding path program 46 times [2021-05-02 12:10:24,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:24,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038734626] [2021-05-02 12:10:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:25,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:25,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:25,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038734626] [2021-05-02 12:10:25,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038734626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:25,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110314993] [2021-05-02 12:10:25,563 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 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 12:10:25,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:10:25,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 12:10:25,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:25,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:25,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110314993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:25,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:25,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-02 12:10:25,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576309067] [2021-05-02 12:10:25,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 12:10:25,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:25,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 12:10:25,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 12:10:25,870 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:26,083 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 12:10:26,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 12:10:26,084 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-02 12:10:26,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:26,085 INFO L225 Difference]: With dead ends: 114 [2021-05-02 12:10:26,085 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 12:10:26,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 964.3ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 12:10:26,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 12:10:26,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 12:10:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 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 12:10:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 12:10:26,088 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 12:10:26,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:26,088 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 12:10:26,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 50 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 12:10:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 12:10:26,089 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:26,089 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:26,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 12:10:26,297 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:26,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:26,297 INFO L82 PathProgramCache]: Analyzing trace with hash 566720411, now seen corresponding path program 47 times [2021-05-02 12:10:26,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:26,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080487955] [2021-05-02 12:10:26,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:26,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:27,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:27,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:27,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080487955] [2021-05-02 12:10:27,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080487955] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:27,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037770552] [2021-05-02 12:10:27,359 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 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 12:10:33,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-05-02 12:10:33,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:10:33,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 12:10:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:10:33,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:10:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:33,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037770552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:33,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:10:33,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 12:10:33,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319509960] [2021-05-02 12:10:33,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 12:10:33,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:10:33,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 12:10:33,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:10:33,789 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:10:34,036 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 12:10:34,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 12:10:34,036 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 12:10:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:10:34,037 INFO L225 Difference]: With dead ends: 116 [2021-05-02 12:10:34,037 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 12:10:34,037 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1010.5ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 12:10:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 12:10:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 12:10:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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 12:10:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 12:10:34,041 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 12:10:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:10:34,041 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 12:10:34,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0384615384615383) internal successors, (106), 51 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:10:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 12:10:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 12:10:34,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:10:34,042 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:10:34,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:10:34,257 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:10:34,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:10:34,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1683253251, now seen corresponding path program 48 times [2021-05-02 12:10:34,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:10:34,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541988583] [2021-05-02 12:10:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:10:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:35,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:10:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:10:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:10:35,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:10:35,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541988583] [2021-05-02 12:10:35,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541988583] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:10:35,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92596815] [2021-05-02 12:10:35,284 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 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 12:12:19,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-05-02 12:12:19,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:12:19,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 12:12:19,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:12:19,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:19,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:12:20,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92596815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:12:20,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:12:20,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 51] total 53 [2021-05-02 12:12:20,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611421425] [2021-05-02 12:12:20,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:12:20,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:12:20,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:12:20,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:12:20,087 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:12:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:12:20,297 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 12:12:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:12:20,298 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 12:12:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:12:20,298 INFO L225 Difference]: With dead ends: 118 [2021-05-02 12:12:20,298 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 12:12:20,299 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 959.0ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:12:20,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 12:12:20,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 12:12:20,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 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 12:12:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 12:12:20,302 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 12:12:20,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:12:20,302 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 12:12:20,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:12:20,302 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 12:12:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 12:12:20,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:12:20,303 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:12:20,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-02 12:12:20,529 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:12:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:12:20,529 INFO L82 PathProgramCache]: Analyzing trace with hash 755574751, now seen corresponding path program 49 times [2021-05-02 12:12:20,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:12:20,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229139610] [2021-05-02 12:12:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:12:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:12:21,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:12:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:12:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:12:21,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:12:21,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229139610] [2021-05-02 12:12:21,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229139610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:12:21,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778620203] [2021-05-02 12:12:21,656 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 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 12:12:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:12:21,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 12:12:21,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:12:21,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:12:21,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778620203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:12:21,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:12:21,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-02 12:12:21,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446333747] [2021-05-02 12:12:21,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 12:12:21,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:12:21,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 12:12:21,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 12:12:21,951 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:12:22,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:12:22,085 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 12:12:22,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 12:12:22,086 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-02 12:12:22,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:12:22,087 INFO L225 Difference]: With dead ends: 120 [2021-05-02 12:12:22,087 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 12:12:22,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 1076.3ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 12:12:22,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 12:12:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 12:12:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 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 12:12:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 12:12:22,090 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 12:12:22,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:12:22,090 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 12:12:22,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 53 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:12:22,091 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 12:12:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 12:12:22,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:12:22,091 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:12:22,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:12:22,305 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:12:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:12:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash -582858943, now seen corresponding path program 50 times [2021-05-02 12:12:22,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:12:22,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319907052] [2021-05-02 12:12:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:12:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:12:23,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:12:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:12:23,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:12:23,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:12:23,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319907052] [2021-05-02 12:12:23,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319907052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:12:23,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256714389] [2021-05-02 12:12:23,430 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 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 12:12:23,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:12:23,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:12:23,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 12:12:23,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:12:23,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:12:23,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256714389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:12:23,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:12:23,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 12:12:23,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896340577] [2021-05-02 12:12:23,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 12:12:23,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:12:23,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 12:12:23,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:12:23,679 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:12:23,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:12:23,941 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 12:12:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 12:12:23,942 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-02 12:12:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:12:23,943 INFO L225 Difference]: With dead ends: 122 [2021-05-02 12:12:23,943 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 12:12:23,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1061.7ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 12:12:23,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 12:12:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 12:12:23,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 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 12:12:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 12:12:23,947 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 12:12:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:12:23,947 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 12:12:23,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.036363636363636) internal successors, (112), 54 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:12:23,947 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 12:12:23,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 12:12:23,947 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:12:23,948 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:12:24,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:12:24,171 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:12:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:12:24,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1672549923, now seen corresponding path program 51 times [2021-05-02 12:12:24,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:12:24,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879731428] [2021-05-02 12:12:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:12:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:12:25,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:12:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:12:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:12:25,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:12:25,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879731428] [2021-05-02 12:12:25,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879731428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:12:25,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045636755] [2021-05-02 12:12:25,318 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 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