/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:15:24,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:15:24,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:15:24,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:15:24,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:15:24,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:15:24,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:15:24,467 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:15:24,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:15:24,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:15:24,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:15:24,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:15:24,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:15:24,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:15:24,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:15:24,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:15:24,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:15:24,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:15:24,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:15:24,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:15:24,508 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 13:15:24,551 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:15:24,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:15:24,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:15:24,554 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:15:24,554 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:15:24,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:15:24,555 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:15:24,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:15:24,555 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:15:24,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:15:24,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:15:24,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:15:24,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:15:24,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:15:24,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:15:24,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:15:24,557 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:15:24,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:15:24,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:15:24,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:15:24,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:15:24,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:15:24,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:15:24,559 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:15:24,559 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:15:24,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:15:24,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:15:24,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:15:24,577 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:15:24,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:15:25,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:15:25,014 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:15:25,015 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:15:25,016 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:15:25,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2021-05-02 13:15:25,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ef329b4a/fb72433422b94f96a168fc72cd5ab2eb/FLAG4b0e1f292 [2021-05-02 13:15:25,631 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:15:25,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2021-05-02 13:15:25,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ef329b4a/fb72433422b94f96a168fc72cd5ab2eb/FLAG4b0e1f292 [2021-05-02 13:15:25,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ef329b4a/fb72433422b94f96a168fc72cd5ab2eb [2021-05-02 13:15:25,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:15:25,991 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:15:25,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:15:25,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:15:26,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:15:26,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:15:25" (1/1) ... [2021-05-02 13:15:26,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40ceae38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26, skipping insertion in model container [2021-05-02 13:15:26,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:15:25" (1/1) ... [2021-05-02 13:15:26,011 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:15:26,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:15:26,181 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2021-05-02 13:15:26,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:15:26,210 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:15:26,244 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2021-05-02 13:15:26,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:15:26,295 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:15:26,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26 WrapperNode [2021-05-02 13:15:26,296 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:15:26,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:15:26,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:15:26,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:15:26,310 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (1/1) ... [2021-05-02 13:15:26,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (1/1) ... [2021-05-02 13:15:26,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (1/1) ... [2021-05-02 13:15:26,320 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (1/1) ... [2021-05-02 13:15:26,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (1/1) ... [2021-05-02 13:15:26,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (1/1) ... [2021-05-02 13:15:26,339 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (1/1) ... [2021-05-02 13:15:26,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:15:26,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:15:26,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:15:26,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:15:26,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (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 13:15:26,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:15:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:15:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:15:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:15:26,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:15:26,432 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:15:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:15:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:15:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:15:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:15:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:15:26,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:15:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:15:26,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:15:26,730 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:15:26,731 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:15:26,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:15:26 BoogieIcfgContainer [2021-05-02 13:15:26,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:15:26,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:15:26,734 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:15:26,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:15:26,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:15:25" (1/3) ... [2021-05-02 13:15:26,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de4b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:15:26, skipping insertion in model container [2021-05-02 13:15:26,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:15:26" (2/3) ... [2021-05-02 13:15:26,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de4b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:15:26, skipping insertion in model container [2021-05-02 13:15:26,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:15:26" (3/3) ... [2021-05-02 13:15:26,740 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2021-05-02 13:15:26,746 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:15:26,751 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:15:26,769 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:15:26,789 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:15:26,790 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:15:26,790 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:15:26,790 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:15:26,790 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:15:26,790 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:15:26,790 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:15:26,790 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:15:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 13:15:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:15:26,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:26,809 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:26,809 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:26,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:26,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2021-05-02 13:15:26,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:26,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899141529] [2021-05-02 13:15:26,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:27,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:27,176 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 13:15:27,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:27,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899141529] [2021-05-02 13:15:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899141529] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:15:27,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:15:27,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:15:27,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011623873] [2021-05-02 13:15:27,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:15:27,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:27,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:15:27,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:15:27,206 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:27,289 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-02 13:15:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:15:27,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:15:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:27,302 INFO L225 Difference]: With dead ends: 32 [2021-05-02 13:15:27,303 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 13:15:27,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:15:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 13:15:27,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 13:15:27,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 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 13:15:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-02 13:15:27,347 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-02 13:15:27,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:27,348 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-02 13:15:27,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-02 13:15:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:15:27,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:27,350 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:27,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:15:27,351 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:27,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2021-05-02 13:15:27,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:27,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15080097] [2021-05-02 13:15:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:27,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:27,500 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 13:15:27,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:27,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15080097] [2021-05-02 13:15:27,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15080097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:15:27,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:15:27,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:15:27,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006666406] [2021-05-02 13:15:27,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:15:27,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:27,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:15:27,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:15:27,505 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:27,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:27,595 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-05-02 13:15:27,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:15:27,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:15:27,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:27,597 INFO L225 Difference]: With dead ends: 22 [2021-05-02 13:15:27,597 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 13:15:27,599 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:15:27,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 13:15:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 13:15:27,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 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 13:15:27,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 13:15:27,605 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-02 13:15:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:27,605 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 13:15:27,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:15:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 13:15:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 13:15:27,606 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:27,606 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:27,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:15:27,606 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:27,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2021-05-02 13:15:27,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:27,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320435543] [2021-05-02 13:15:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:27,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:27,750 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 13:15:27,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:27,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320435543] [2021-05-02 13:15:27,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320435543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:27,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602345031] [2021-05-02 13:15:27,752 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 13:15:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:27,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 13:15:27,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:27,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:27,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:27,957 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 13:15:27,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602345031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:27,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:27,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 13:15:27,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160345936] [2021-05-02 13:15:27,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:15:27,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:27,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:15:27,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:15:27,960 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 13:15:28,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:28,064 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-05-02 13:15:28,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:15:28,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 13 [2021-05-02 13:15:28,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:28,066 INFO L225 Difference]: With dead ends: 24 [2021-05-02 13:15:28,066 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 13:15:28,067 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:15:28,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 13:15:28,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 13:15:28,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 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 13:15:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 13:15:28,072 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2021-05-02 13:15:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:28,072 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 13:15:28,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 13:15:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 13:15:28,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 13:15:28,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:28,073 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:28,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 13:15:28,297 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:28,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1002491197, now seen corresponding path program 2 times [2021-05-02 13:15:28,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:28,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254147166] [2021-05-02 13:15:28,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:28,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:28,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 13:15:28,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:28,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254147166] [2021-05-02 13:15:28,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254147166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:15:28,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:15:28,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 13:15:28,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807353645] [2021-05-02 13:15:28,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 13:15:28,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:28,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 13:15:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 13:15:28,379 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 13:15:28,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:28,436 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-05-02 13:15:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 13:15:28,436 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 13:15:28,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:28,437 INFO L225 Difference]: With dead ends: 24 [2021-05-02 13:15:28,437 INFO L226 Difference]: Without dead ends: 19 [2021-05-02 13:15:28,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:15:28,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-02 13:15:28,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-05-02 13:15:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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 13:15:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-05-02 13:15:28,461 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2021-05-02 13:15:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:28,461 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-05-02 13:15:28,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 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 13:15:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-05-02 13:15:28,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:15:28,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:28,462 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:28,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 13:15:28,463 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:28,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:28,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1870563496, now seen corresponding path program 1 times [2021-05-02 13:15:28,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:28,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175164393] [2021-05-02 13:15:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:28,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:28,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:15:28,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:28,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175164393] [2021-05-02 13:15:28,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175164393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:28,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492153025] [2021-05-02 13:15:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:15:28,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:28,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:28,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:28,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:28,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:15:28,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492153025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:28,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:28,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 13:15:28,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902885112] [2021-05-02 13:15:28,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 13:15:28,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:28,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 13:15:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 13:15:28,810 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 13:15:28,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:28,966 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-05-02 13:15:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 13:15:28,968 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 13:15:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:28,971 INFO L225 Difference]: With dead ends: 28 [2021-05-02 13:15:28,972 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 13:15:28,975 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:15:28,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 13:15:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-02 13:15:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 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 13:15:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-05-02 13:15:28,990 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-05-02 13:15:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:28,991 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-05-02 13:15:28,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 13:15:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-05-02 13:15:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-02 13:15:28,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:28,992 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:29,213 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:29,213 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:29,214 INFO L82 PathProgramCache]: Analyzing trace with hash -402805515, now seen corresponding path program 2 times [2021-05-02 13:15:29,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:29,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960853472] [2021-05-02 13:15:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:29,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:15:29,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:29,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960853472] [2021-05-02 13:15:29,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960853472] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:29,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515779591] [2021-05-02 13:15:29,354 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 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 13:15:29,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:15:29,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:29,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:15:29,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:29,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:15:29,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515779591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:29,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:29,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 13:15:29,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646353812] [2021-05-02 13:15:29,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:15:29,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:29,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:15:29,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:15:29,498 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 13:15:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:29,662 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 13:15:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:15:29,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 19 [2021-05-02 13:15:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:29,664 INFO L225 Difference]: With dead ends: 30 [2021-05-02 13:15:29,664 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 13:15:29,664 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:15:29,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 13:15:29,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 13:15:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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 13:15:29,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-05-02 13:15:29,670 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2021-05-02 13:15:29,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:29,670 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-05-02 13:15:29,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 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 13:15:29,671 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-05-02 13:15:29,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 13:15:29,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:29,671 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:29,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:29,873 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:29,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:29,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1363341138, now seen corresponding path program 3 times [2021-05-02 13:15:29,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:29,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808932490] [2021-05-02 13:15:29,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:29,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:29,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:29,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:15:29,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:29,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808932490] [2021-05-02 13:15:29,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808932490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:29,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109935154] [2021-05-02 13:15:29,956 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 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 13:15:30,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 13:15:30,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:30,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 13:15:30,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:30,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 13:15:30,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109935154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:30,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:30,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4] total 10 [2021-05-02 13:15:30,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193845817] [2021-05-02 13:15:30,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:15:30,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:30,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:15:30,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:15:30,080 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 13:15:30,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:30,345 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 13:15:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:15:30,346 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 21 [2021-05-02 13:15:30,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:30,349 INFO L225 Difference]: With dead ends: 35 [2021-05-02 13:15:30,349 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 13:15:30,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-02 13:15:30,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 13:15:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-05-02 13:15:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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 13:15:30,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-05-02 13:15:30,366 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 21 [2021-05-02 13:15:30,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:30,366 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-05-02 13:15:30,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 13:15:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-05-02 13:15:30,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 13:15:30,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:30,368 INFO L523 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:30,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:30,585 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash 871773194, now seen corresponding path program 4 times [2021-05-02 13:15:30,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:30,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657996700] [2021-05-02 13:15:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:30,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:30,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:30,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657996700] [2021-05-02 13:15:30,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657996700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:30,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560687401] [2021-05-02 13:15:30,704 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 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 13:15:30,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:15:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:15:30,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:30,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:30,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560687401] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:30,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:30,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 13:15:30,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013746727] [2021-05-02 13:15:30,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:15:30,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:30,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:15:30,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:15:30,861 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 13:15:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:31,064 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-05-02 13:15:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:15:31,065 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 25 [2021-05-02 13:15:31,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:31,065 INFO L225 Difference]: With dead ends: 38 [2021-05-02 13:15:31,066 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 13:15:31,066 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 205.4ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:15:31,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 13:15:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-02 13:15:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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 13:15:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-05-02 13:15:31,072 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 25 [2021-05-02 13:15:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:31,072 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-05-02 13:15:31,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 13:15:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-05-02 13:15:31,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:15:31,073 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:31,073 INFO L523 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:31,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:31,289 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:31,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:31,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1751481511, now seen corresponding path program 5 times [2021-05-02 13:15:31,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:31,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291242540] [2021-05-02 13:15:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:31,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:31,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:31,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291242540] [2021-05-02 13:15:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291242540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:31,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716778180] [2021-05-02 13:15:31,398 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 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 13:15:31,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-02 13:15:31,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:31,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:15:31,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:31,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:31,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716778180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:31,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:31,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 13:15:31,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342350682] [2021-05-02 13:15:31,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:15:31,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:31,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:15:31,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:15:31,551 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 13:15:31,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:31,815 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-05-02 13:15:31,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:15:31,816 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 27 [2021-05-02 13:15:31,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:31,817 INFO L225 Difference]: With dead ends: 40 [2021-05-02 13:15:31,817 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 13:15:31,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 248.9ms TimeCoverageRelationStatistics Valid=118, Invalid=188, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:15:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 13:15:31,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 13:15:31,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 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 13:15:31,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-05-02 13:15:31,823 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-05-02 13:15:31,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:31,824 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-05-02 13:15:31,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 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 13:15:31,824 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-05-02 13:15:31,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 13:15:31,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:31,825 INFO L523 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:32,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:32,029 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1042616836, now seen corresponding path program 6 times [2021-05-02 13:15:32,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:32,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212206057] [2021-05-02 13:15:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:32,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:32,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:32,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212206057] [2021-05-02 13:15:32,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212206057] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:32,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891265608] [2021-05-02 13:15:32,142 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 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 13:15:32,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-02 13:15:32,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:15:32,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:32,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:32,344 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 13:15:32,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891265608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:32,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:32,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-05-02 13:15:32,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712505611] [2021-05-02 13:15:32,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 13:15:32,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 13:15:32,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:15:32,346 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 13:15:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:32,699 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-05-02 13:15:32,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 13:15:32,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 29 [2021-05-02 13:15:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:32,701 INFO L225 Difference]: With dead ends: 46 [2021-05-02 13:15:32,701 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 13:15:32,702 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 341.1ms TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:15:32,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 13:15:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-02 13:15:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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 13:15:32,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-05-02 13:15:32,708 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 29 [2021-05-02 13:15:32,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:32,708 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-05-02 13:15:32,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 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 13:15:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-05-02 13:15:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 13:15:32,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:32,709 INFO L523 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:32,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 13:15:32,934 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:32,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:32,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1006616219, now seen corresponding path program 7 times [2021-05-02 13:15:32,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:32,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171175220] [2021-05-02 13:15:32,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:33,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:33,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:33,131 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:33,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:33,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171175220] [2021-05-02 13:15:33,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171175220] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:33,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995048540] [2021-05-02 13:15:33,132 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 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 13:15:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:15:33,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:33,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:33,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995048540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:33,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:33,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-02 13:15:33,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521072671] [2021-05-02 13:15:33,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 13:15:33,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:33,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 13:15:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:15:33,305 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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 13:15:33,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:33,693 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2021-05-02 13:15:33,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 13:15:33,694 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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 35 [2021-05-02 13:15:33,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:33,695 INFO L225 Difference]: With dead ends: 48 [2021-05-02 13:15:33,695 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 13:15:33,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 388.5ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-05-02 13:15:33,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 13:15:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 13:15:33,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 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 13:15:33,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-05-02 13:15:33,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 35 [2021-05-02 13:15:33,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:33,702 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-05-02 13:15:33,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 states have internal predecessors, (35), 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 13:15:33,702 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-05-02 13:15:33,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 13:15:33,703 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:33,703 INFO L523 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:33,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 13:15:33,904 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:33,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:33,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1808357640, now seen corresponding path program 8 times [2021-05-02 13:15:33,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:33,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076907610] [2021-05-02 13:15:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:34,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:34,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:34,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076907610] [2021-05-02 13:15:34,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076907610] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:34,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716266041] [2021-05-02 13:15:34,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:34,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:15:34,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:34,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:15:34,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:34,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:34,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716266041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:34,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:34,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-02 13:15:34,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556488609] [2021-05-02 13:15:34,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 13:15:34,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:34,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 13:15:34,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:15:34,263 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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 13:15:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:34,680 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-05-02 13:15:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 13:15:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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 37 [2021-05-02 13:15:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:34,682 INFO L225 Difference]: With dead ends: 50 [2021-05-02 13:15:34,682 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 13:15:34,683 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=288, Invalid=468, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:15:34,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 13:15:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-05-02 13:15:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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 13:15:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 13:15:34,689 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2021-05-02 13:15:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:34,689 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 13:15:34,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 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 13:15:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 13:15:34,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 13:15:34,690 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:34,690 INFO L523 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:34,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:34,909 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:34,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:34,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1168839659, now seen corresponding path program 9 times [2021-05-02 13:15:34,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:34,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539975691] [2021-05-02 13:15:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:35,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:35,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 39 proven. 156 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:15:35,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539975691] [2021-05-02 13:15:35,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539975691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507796855] [2021-05-02 13:15:35,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:35,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 13:15:35,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:35,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 13:15:35,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:35,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 60 proven. 4 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-05-02 13:15:35,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507796855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:35,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:35,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2021-05-02 13:15:35,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118438712] [2021-05-02 13:15:35,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:15:35,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:35,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:15:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:15:35,293 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 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 13:15:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:35,838 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-05-02 13:15:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 13:15:35,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 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 39 [2021-05-02 13:15:35,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:35,840 INFO L225 Difference]: With dead ends: 55 [2021-05-02 13:15:35,840 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 13:15:35,841 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:15:35,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 13:15:35,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-05-02 13:15:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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 13:15:35,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-05-02 13:15:35,847 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 39 [2021-05-02 13:15:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:35,847 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-05-02 13:15:35,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 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 13:15:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-05-02 13:15:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 13:15:35,848 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:35,848 INFO L523 BasicCegarLoop]: trace histogram [16, 13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:36,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:36,062 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:36,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:36,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1872080589, now seen corresponding path program 10 times [2021-05-02 13:15:36,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:36,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610359775] [2021-05-02 13:15:36,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:36,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:36,243 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:15:36,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:36,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610359775] [2021-05-02 13:15:36,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610359775] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:36,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083283556] [2021-05-02 13:15:36,244 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 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 13:15:36,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:15:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:36,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:15:36,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:36,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:15:36,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083283556] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:36,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:36,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-05-02 13:15:36,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965497438] [2021-05-02 13:15:36,431 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 13:15:36,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:36,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 13:15:36,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 13:15:36,432 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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 13:15:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:36,879 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-02 13:15:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 13:15:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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 43 [2021-05-02 13:15:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:36,881 INFO L225 Difference]: With dead ends: 58 [2021-05-02 13:15:36,881 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 13:15:36,882 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=377, Invalid=615, Unknown=0, NotChecked=0, Total=992 [2021-05-02 13:15:36,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 13:15:36,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-05-02 13:15:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 13:15:36,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-05-02 13:15:36,909 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 43 [2021-05-02 13:15:36,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:36,910 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-05-02 13:15:36,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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 13:15:36,910 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-05-02 13:15:36,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-02 13:15:36,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:36,911 INFO L523 BasicCegarLoop]: trace histogram [17, 14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:37,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 13:15:37,125 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:37,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 323021354, now seen corresponding path program 11 times [2021-05-02 13:15:37,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:37,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613647407] [2021-05-02 13:15:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:37,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:15:37,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:37,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613647407] [2021-05-02 13:15:37,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613647407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:37,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063278333] [2021-05-02 13:15:37,302 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 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 13:15:37,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-05-02 13:15:37,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:37,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:15:37,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:37,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 75 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:15:37,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063278333] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:37,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:37,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2021-05-02 13:15:37,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266957152] [2021-05-02 13:15:37,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 13:15:37,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:37,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 13:15:37,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 13:15:37,469 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 13:15:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:37,937 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-05-02 13:15:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 13:15:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 45 [2021-05-02 13:15:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:37,939 INFO L225 Difference]: With dead ends: 60 [2021-05-02 13:15:37,939 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 13:15:37,941 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 499.5ms TimeCoverageRelationStatistics Valid=426, Invalid=696, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:15:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 13:15:37,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 13:15:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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 13:15:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-05-02 13:15:37,950 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 45 [2021-05-02 13:15:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:37,950 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-05-02 13:15:37,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 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 13:15:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-05-02 13:15:37,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 13:15:37,952 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:37,952 INFO L523 BasicCegarLoop]: trace histogram [18, 15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:38,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:15:38,165 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:38,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:38,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2030748231, now seen corresponding path program 12 times [2021-05-02 13:15:38,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:38,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395056980] [2021-05-02 13:15:38,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:38,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 80 proven. 240 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 13:15:38,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:38,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395056980] [2021-05-02 13:15:38,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395056980] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:38,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31710447] [2021-05-02 13:15:38,418 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 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 13:15:38,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-05-02 13:15:38,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:38,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 13:15:38,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:38,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:38,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:38,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:38,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:38,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:38,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:38,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:38,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 105 proven. 9 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-05-02 13:15:38,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31710447] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:38,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:38,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 6] total 23 [2021-05-02 13:15:38,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469675991] [2021-05-02 13:15:38,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 13:15:38,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:38,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 13:15:38,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 13:15:38,656 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 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 13:15:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:39,376 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-05-02 13:15:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 13:15:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 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 47 [2021-05-02 13:15:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:39,377 INFO L225 Difference]: With dead ends: 65 [2021-05-02 13:15:39,377 INFO L226 Difference]: Without dead ends: 53 [2021-05-02 13:15:39,378 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 825.1ms TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:15:39,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-05-02 13:15:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2021-05-02 13:15:39,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 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 13:15:39,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-05-02 13:15:39,384 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 47 [2021-05-02 13:15:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:39,384 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-05-02 13:15:39,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 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 13:15:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-05-02 13:15:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 13:15:39,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:39,385 INFO L523 BasicCegarLoop]: trace histogram [20, 16, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:39,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 13:15:39,612 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:39,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:39,613 INFO L82 PathProgramCache]: Analyzing trace with hash -505883777, now seen corresponding path program 13 times [2021-05-02 13:15:39,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:39,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177094565] [2021-05-02 13:15:39,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:39,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 13:15:39,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:39,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177094565] [2021-05-02 13:15:39,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177094565] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:39,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487235011] [2021-05-02 13:15:39,822 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 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 13:15:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:39,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:15:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:39,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:39,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:40,009 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 119 proven. 272 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 13:15:40,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487235011] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:40,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:40,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2021-05-02 13:15:40,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243512173] [2021-05-02 13:15:40,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 13:15:40,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 13:15:40,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 13:15:40,012 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 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 13:15:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:40,608 INFO L93 Difference]: Finished difference Result 68 states and 77 transitions. [2021-05-02 13:15:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 13:15:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 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 51 [2021-05-02 13:15:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:40,609 INFO L225 Difference]: With dead ends: 68 [2021-05-02 13:15:40,610 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 13:15:40,610 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 635.7ms TimeCoverageRelationStatistics Valid=533, Invalid=873, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 13:15:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 13:15:40,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-05-02 13:15:40,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 13:15:40,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2021-05-02 13:15:40,617 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 51 [2021-05-02 13:15:40,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:40,617 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2021-05-02 13:15:40,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 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 13:15:40,617 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2021-05-02 13:15:40,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 13:15:40,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:40,618 INFO L523 BasicCegarLoop]: trace histogram [21, 17, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:40,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:40,841 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1291149788, now seen corresponding path program 14 times [2021-05-02 13:15:40,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:40,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422938385] [2021-05-02 13:15:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:41,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 13:15:41,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:41,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422938385] [2021-05-02 13:15:41,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422938385] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:41,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619999578] [2021-05-02 13:15:41,079 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 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 13:15:41,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:15:41,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:15:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:41,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 126 proven. 306 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 13:15:41,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619999578] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:41,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:41,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2021-05-02 13:15:41,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985081056] [2021-05-02 13:15:41,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 13:15:41,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 13:15:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 13:15:41,250 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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 13:15:41,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:41,930 INFO L93 Difference]: Finished difference Result 70 states and 79 transitions. [2021-05-02 13:15:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 13:15:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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 53 [2021-05-02 13:15:41,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:41,931 INFO L225 Difference]: With dead ends: 70 [2021-05-02 13:15:41,931 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:15:41,932 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 741.0ms TimeCoverageRelationStatistics Valid=591, Invalid=969, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:15:41,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:15:41,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 13:15:41,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 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 13:15:41,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-05-02 13:15:41,937 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 53 [2021-05-02 13:15:41,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:41,938 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-05-02 13:15:41,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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 13:15:41,938 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-05-02 13:15:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 13:15:41,938 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:41,939 INFO L523 BasicCegarLoop]: trace histogram [22, 18, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:42,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 13:15:42,145 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:42,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1663552761, now seen corresponding path program 15 times [2021-05-02 13:15:42,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:42,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873858977] [2021-05-02 13:15:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:42,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 133 proven. 342 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 13:15:42,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:42,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873858977] [2021-05-02 13:15:42,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873858977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:42,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298975479] [2021-05-02 13:15:42,414 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 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 13:15:42,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 13:15:42,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:42,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 13:15:42,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:42,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 162 proven. 16 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2021-05-02 13:15:42,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298975479] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:42,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:42,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2021-05-02 13:15:42,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098587917] [2021-05-02 13:15:42,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 13:15:42,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:42,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 13:15:42,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 13:15:42,681 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 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 13:15:43,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:43,575 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-05-02 13:15:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 13:15:43,576 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 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 55 [2021-05-02 13:15:43,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:43,577 INFO L225 Difference]: With dead ends: 75 [2021-05-02 13:15:43,577 INFO L226 Difference]: Without dead ends: 61 [2021-05-02 13:15:43,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1036.4ms TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 13:15:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-05-02 13:15:43,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-05-02 13:15:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 55 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 13:15:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-02 13:15:43,597 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 55 [2021-05-02 13:15:43,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:43,598 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-02 13:15:43,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 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 13:15:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-02 13:15:43,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 13:15:43,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:43,600 INFO L523 BasicCegarLoop]: trace histogram [24, 19, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:43,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:43,822 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash 214240433, now seen corresponding path program 16 times [2021-05-02 13:15:43,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:43,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441542428] [2021-05-02 13:15:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:44,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:15:44,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:44,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441542428] [2021-05-02 13:15:44,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441542428] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:44,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673116808] [2021-05-02 13:15:44,094 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 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 13:15:44,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:15:44,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:44,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:15:44,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:44,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 180 proven. 380 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:15:44,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673116808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:44,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:44,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2021-05-02 13:15:44,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524056539] [2021-05-02 13:15:44,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 13:15:44,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:44,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 13:15:44,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 13:15:44,276 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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 13:15:44,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:44,992 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2021-05-02 13:15:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 13:15:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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 59 [2021-05-02 13:15:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:44,993 INFO L225 Difference]: With dead ends: 78 [2021-05-02 13:15:44,993 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 13:15:44,994 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 791.3ms TimeCoverageRelationStatistics Valid=716, Invalid=1176, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 13:15:44,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 13:15:44,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-05-02 13:15:44,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.105263157894737) internal successors, (63), 57 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 13:15:44,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2021-05-02 13:15:45,000 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 59 [2021-05-02 13:15:45,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:45,000 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2021-05-02 13:15:45,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 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 13:15:45,000 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2021-05-02 13:15:45,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 13:15:45,001 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:45,001 INFO L523 BasicCegarLoop]: trace histogram [25, 20, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:45,229 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:45,229 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:45,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1850732046, now seen corresponding path program 17 times [2021-05-02 13:15:45,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:45,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353424210] [2021-05-02 13:15:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:45,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:15:45,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:45,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353424210] [2021-05-02 13:15:45,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353424210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:45,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977654456] [2021-05-02 13:15:45,497 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:45,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-05-02 13:15:45,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:45,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:15:45,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:45,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 189 proven. 420 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:15:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977654456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:45,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:45,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2021-05-02 13:15:45,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552733028] [2021-05-02 13:15:45,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 13:15:45,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:45,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 13:15:45,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 13:15:45,695 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 13:15:46,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:46,452 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2021-05-02 13:15:46,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 13:15:46,453 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 61 [2021-05-02 13:15:46,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:46,454 INFO L225 Difference]: With dead ends: 80 [2021-05-02 13:15:46,454 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 13:15:46,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 833.6ms TimeCoverageRelationStatistics Valid=783, Invalid=1287, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:15:46,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 13:15:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-05-02 13:15:46,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 59 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 13:15:46,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2021-05-02 13:15:46,459 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 61 [2021-05-02 13:15:46,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:46,460 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2021-05-02 13:15:46,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 13:15:46,460 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2021-05-02 13:15:46,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-05-02 13:15:46,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:46,461 INFO L523 BasicCegarLoop]: trace histogram [26, 21, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:46,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 13:15:46,662 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:46,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:46,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1733825493, now seen corresponding path program 18 times [2021-05-02 13:15:46,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:46,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910246507] [2021-05-02 13:15:46,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:46,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:46,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 198 proven. 462 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 13:15:46,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:46,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910246507] [2021-05-02 13:15:46,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910246507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:46,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613781328] [2021-05-02 13:15:46,958 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 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 13:15:47,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-05-02 13:15:47,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:47,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 13:15:47,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:47,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 231 proven. 25 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2021-05-02 13:15:47,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613781328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:47,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:47,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2021-05-02 13:15:47,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797117242] [2021-05-02 13:15:47,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 13:15:47,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:47,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 13:15:47,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:15:47,296 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 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 13:15:48,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:48,444 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2021-05-02 13:15:48,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 13:15:48,444 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 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 63 [2021-05-02 13:15:48,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:48,445 INFO L225 Difference]: With dead ends: 85 [2021-05-02 13:15:48,445 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 13:15:48,447 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1333.4ms TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 13:15:48,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 13:15:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 13:15:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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 13:15:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2021-05-02 13:15:48,451 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 63 [2021-05-02 13:15:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:48,451 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2021-05-02 13:15:48,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 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 13:15:48,451 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2021-05-02 13:15:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-02 13:15:48,452 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:48,452 INFO L523 BasicCegarLoop]: trace histogram [28, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:48,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:48,677 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:48,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1943943779, now seen corresponding path program 19 times [2021-05-02 13:15:48,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:48,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683788671] [2021-05-02 13:15:48,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:48,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 13:15:48,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:48,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683788671] [2021-05-02 13:15:48,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683788671] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:48,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662282168] [2021-05-02 13:15:48,994 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 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 13:15:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:49,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 13:15:49,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:49,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 253 proven. 506 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 13:15:49,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662282168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:49,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:49,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2021-05-02 13:15:49,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550422125] [2021-05-02 13:15:49,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 13:15:49,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:49,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 13:15:49,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 13:15:49,208 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 13:15:49,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:49,975 INFO L93 Difference]: Finished difference Result 88 states and 101 transitions. [2021-05-02 13:15:49,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 13:15:49,976 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 67 [2021-05-02 13:15:49,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:49,977 INFO L225 Difference]: With dead ends: 88 [2021-05-02 13:15:49,977 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 13:15:49,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 891.1ms TimeCoverageRelationStatistics Valid=926, Invalid=1524, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 13:15:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 13:15:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-05-02 13:15:49,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.1076923076923078) internal successors, (72), 65 states have internal predecessors, (72), 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 13:15:49,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-05-02 13:15:49,983 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 67 [2021-05-02 13:15:49,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:49,983 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-05-02 13:15:49,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 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 13:15:49,983 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-05-02 13:15:49,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 13:15:49,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:49,984 INFO L523 BasicCegarLoop]: trace histogram [29, 23, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:50,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 13:15:50,209 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:50,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:50,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1378586944, now seen corresponding path program 20 times [2021-05-02 13:15:50,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:50,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979394824] [2021-05-02 13:15:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:50,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 13:15:50,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:50,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979394824] [2021-05-02 13:15:50,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979394824] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:50,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023744423] [2021-05-02 13:15:50,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:50,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:15:50,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:50,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:15:50,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:50,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 264 proven. 552 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 13:15:50,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023744423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:50,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:50,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2021-05-02 13:15:50,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207368093] [2021-05-02 13:15:50,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 13:15:50,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:50,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 13:15:50,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 13:15:50,818 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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 13:15:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:51,732 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2021-05-02 13:15:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 13:15:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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 69 [2021-05-02 13:15:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:51,734 INFO L225 Difference]: With dead ends: 90 [2021-05-02 13:15:51,734 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 13:15:51,735 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1080.2ms TimeCoverageRelationStatistics Valid=1002, Invalid=1650, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:15:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 13:15:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-05-02 13:15:51,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.1044776119402986) internal successors, (74), 67 states have internal predecessors, (74), 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 13:15:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2021-05-02 13:15:51,740 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 69 [2021-05-02 13:15:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:51,740 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2021-05-02 13:15:51,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 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 13:15:51,741 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2021-05-02 13:15:51,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 13:15:51,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:51,741 INFO L523 BasicCegarLoop]: trace histogram [30, 24, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:51,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 13:15:51,942 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:51,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:51,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1125056477, now seen corresponding path program 21 times [2021-05-02 13:15:51,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:51,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504699735] [2021-05-02 13:15:51,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:52,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 275 proven. 600 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 13:15:52,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:52,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504699735] [2021-05-02 13:15:52,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504699735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:52,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652917458] [2021-05-02 13:15:52,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:52,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-05-02 13:15:52,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:52,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:15:52,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:52,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 312 proven. 36 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2021-05-02 13:15:52,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652917458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:52,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:52,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9] total 35 [2021-05-02 13:15:52,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520528845] [2021-05-02 13:15:52,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 13:15:52,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:52,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 13:15:52,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 13:15:52,627 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 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 13:15:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:53,799 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-05-02 13:15:53,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 13:15:53,800 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 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 71 [2021-05-02 13:15:53,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:53,801 INFO L225 Difference]: With dead ends: 95 [2021-05-02 13:15:53,801 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 13:15:53,802 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 1472.4ms TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 13:15:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 13:15:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-05-02 13:15:53,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 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 13:15:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2021-05-02 13:15:53,807 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 71 [2021-05-02 13:15:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:53,807 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2021-05-02 13:15:53,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 34 states have internal predecessors, (77), 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 13:15:53,808 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2021-05-02 13:15:53,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 13:15:53,808 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:53,808 INFO L523 BasicCegarLoop]: trace histogram [32, 25, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:54,016 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:54,017 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:54,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1647328405, now seen corresponding path program 22 times [2021-05-02 13:15:54,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:54,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201062938] [2021-05-02 13:15:54,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:54,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:54,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 13:15:54,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:54,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201062938] [2021-05-02 13:15:54,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201062938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:54,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569761922] [2021-05-02 13:15:54,395 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 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 13:15:54,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:15:54,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:54,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:15:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:54,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 338 proven. 650 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 13:15:54,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569761922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:54,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:54,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2021-05-02 13:15:54,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493022982] [2021-05-02 13:15:54,590 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 13:15:54,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 13:15:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 13:15:54,591 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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 13:15:55,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:55,396 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2021-05-02 13:15:55,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 13:15:55,396 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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 75 [2021-05-02 13:15:55,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:55,397 INFO L225 Difference]: With dead ends: 98 [2021-05-02 13:15:55,397 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 13:15:55,398 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1055.1ms TimeCoverageRelationStatistics Valid=1163, Invalid=1917, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 13:15:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 13:15:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-05-02 13:15:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 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 13:15:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2021-05-02 13:15:55,402 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 75 [2021-05-02 13:15:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:55,403 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2021-05-02 13:15:55,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 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 13:15:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2021-05-02 13:15:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 13:15:55,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:55,403 INFO L523 BasicCegarLoop]: trace histogram [33, 26, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:55,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 13:15:55,609 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash 160351218, now seen corresponding path program 23 times [2021-05-02 13:15:55,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:55,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811691808] [2021-05-02 13:15:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:55,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 13:15:55,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:55,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811691808] [2021-05-02 13:15:55,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811691808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:55,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093376144] [2021-05-02 13:15:55,978 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 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 13:15:56,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-05-02 13:15:56,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:56,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:15:56,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:56,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:56,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 351 proven. 702 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 13:15:56,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093376144] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:56,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:56,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2021-05-02 13:15:56,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251191163] [2021-05-02 13:15:56,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 13:15:56,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:56,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 13:15:56,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 13:15:56,202 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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 13:15:57,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:57,172 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2021-05-02 13:15:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 13:15:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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 77 [2021-05-02 13:15:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:57,173 INFO L225 Difference]: With dead ends: 100 [2021-05-02 13:15:57,173 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 13:15:57,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1115.7ms TimeCoverageRelationStatistics Valid=1248, Invalid=2058, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:15:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 13:15:57,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-05-02 13:15:57,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 75 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 13:15:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-05-02 13:15:57,179 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 77 [2021-05-02 13:15:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:57,179 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-05-02 13:15:57,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 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 13:15:57,179 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-05-02 13:15:57,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 13:15:57,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:57,180 INFO L523 BasicCegarLoop]: trace histogram [34, 27, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:57,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:15:57,380 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:57,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1399384079, now seen corresponding path program 24 times [2021-05-02 13:15:57,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:57,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935512876] [2021-05-02 13:15:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:57,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:57,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:15:57,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:15:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 364 proven. 756 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-02 13:15:57,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:15:57,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935512876] [2021-05-02 13:15:57,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935512876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:57,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396569718] [2021-05-02 13:15:57,778 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 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 13:15:57,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-05-02 13:15:57,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:15:57,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:15:57,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:15:57,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:57,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:57,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:57,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:57,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:57,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:15:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 405 proven. 49 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2021-05-02 13:15:58,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396569718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:15:58,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:15:58,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 10] total 39 [2021-05-02 13:15:58,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196337394] [2021-05-02 13:15:58,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 13:15:58,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:15:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 13:15:58,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 13:15:58,193 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 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 13:15:59,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:15:59,549 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2021-05-02 13:15:59,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 13:15:59,550 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 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 79 [2021-05-02 13:15:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:15:59,551 INFO L225 Difference]: With dead ends: 105 [2021-05-02 13:15:59,551 INFO L226 Difference]: Without dead ends: 85 [2021-05-02 13:15:59,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1735.1ms TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 13:15:59,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-02 13:15:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-05-02 13:15:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.1139240506329113) internal successors, (88), 79 states have internal predecessors, (88), 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 13:15:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-05-02 13:15:59,561 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 79 [2021-05-02 13:15:59,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:15:59,561 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-05-02 13:15:59,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.1794871794871793) internal successors, (85), 38 states have internal predecessors, (85), 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 13:15:59,561 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-05-02 13:15:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-02 13:15:59,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:15:59,562 INFO L523 BasicCegarLoop]: trace histogram [36, 28, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:15:59,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 13:15:59,777 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:15:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:15:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash 676262727, now seen corresponding path program 25 times [2021-05-02 13:15:59,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:15:59,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252207334] [2021-05-02 13:15:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:15:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:00,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:16:00,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:00,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252207334] [2021-05-02 13:16:00,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252207334] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:00,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895488120] [2021-05-02 13:16:00,246 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 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 13:16:00,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:00,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:16:00,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:00,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 435 proven. 812 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:16:00,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895488120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:00,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:00,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2021-05-02 13:16:00,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149490609] [2021-05-02 13:16:00,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 13:16:00,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 13:16:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 13:16:00,451 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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 13:16:01,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:01,472 INFO L93 Difference]: Finished difference Result 108 states and 125 transitions. [2021-05-02 13:16:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 13:16:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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 83 [2021-05-02 13:16:01,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:01,473 INFO L225 Difference]: With dead ends: 108 [2021-05-02 13:16:01,473 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 13:16:01,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1315.1ms TimeCoverageRelationStatistics Valid=1427, Invalid=2355, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 13:16:01,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 13:16:01,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-05-02 13:16:01,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 states have internal predecessors, (90), 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 13:16:01,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2021-05-02 13:16:01,479 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 83 [2021-05-02 13:16:01,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:01,479 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2021-05-02 13:16:01,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 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 13:16:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2021-05-02 13:16:01,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 13:16:01,480 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:01,480 INFO L523 BasicCegarLoop]: trace histogram [37, 29, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:01,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 13:16:01,689 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:01,689 INFO L82 PathProgramCache]: Analyzing trace with hash -2062365276, now seen corresponding path program 26 times [2021-05-02 13:16:01,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:01,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942368904] [2021-05-02 13:16:01,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:02,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:02,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:16:02,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:02,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942368904] [2021-05-02 13:16:02,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942368904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:02,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661281316] [2021-05-02 13:16:02,121 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 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 13:16:02,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:16:02,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:16:02,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:02,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 450 proven. 870 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:16:02,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661281316] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:02,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:02,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2021-05-02 13:16:02,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987185998] [2021-05-02 13:16:02,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 13:16:02,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:02,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 13:16:02,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 13:16:02,334 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 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 13:16:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:03,331 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2021-05-02 13:16:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 13:16:03,331 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 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 85 [2021-05-02 13:16:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:03,332 INFO L225 Difference]: With dead ends: 110 [2021-05-02 13:16:03,332 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 13:16:03,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1281.2ms TimeCoverageRelationStatistics Valid=1521, Invalid=2511, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:16:03,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 13:16:03,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-02 13:16:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.108433734939759) internal successors, (92), 83 states have internal predecessors, (92), 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 13:16:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2021-05-02 13:16:03,338 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 85 [2021-05-02 13:16:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:03,338 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2021-05-02 13:16:03,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 33 states have internal predecessors, (73), 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 13:16:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2021-05-02 13:16:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-02 13:16:03,339 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:03,339 INFO L523 BasicCegarLoop]: trace histogram [38, 30, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:03,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:03,540 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:03,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1068923711, now seen corresponding path program 27 times [2021-05-02 13:16:03,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:03,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250313112] [2021-05-02 13:16:03,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:03,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:04,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 465 proven. 930 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-05-02 13:16:04,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:04,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250313112] [2021-05-02 13:16:04,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250313112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:04,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520746174] [2021-05-02 13:16:04,056 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 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 13:16:04,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-05-02 13:16:04,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:04,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 13:16:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:04,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 510 proven. 64 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-05-02 13:16:04,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520746174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:04,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:04,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2021-05-02 13:16:04,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046260181] [2021-05-02 13:16:04,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 13:16:04,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 13:16:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:16:04,508 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 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 13:16:06,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:06,120 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2021-05-02 13:16:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 13:16:06,120 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 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 87 [2021-05-02 13:16:06,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:06,121 INFO L225 Difference]: With dead ends: 115 [2021-05-02 13:16:06,121 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 13:16:06,122 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 2146.2ms TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 13:16:06,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 13:16:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 13:16:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 87 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 13:16:06,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-02 13:16:06,127 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 87 [2021-05-02 13:16:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:06,127 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-02 13:16:06,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.1627906976744184) internal successors, (93), 42 states have internal predecessors, (93), 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 13:16:06,127 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-02 13:16:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-02 13:16:06,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:06,128 INFO L523 BasicCegarLoop]: trace histogram [40, 31, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:06,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:06,333 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash -631882119, now seen corresponding path program 28 times [2021-05-02 13:16:06,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:06,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319178765] [2021-05-02 13:16:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:06,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 13:16:06,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:06,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319178765] [2021-05-02 13:16:06,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319178765] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:06,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231888422] [2021-05-02 13:16:06,833 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 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 13:16:06,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:16:06,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:06,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:16:06,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:06,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:06,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 544 proven. 992 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 13:16:07,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231888422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:07,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:07,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2021-05-02 13:16:07,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697947391] [2021-05-02 13:16:07,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 13:16:07,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:07,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 13:16:07,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 13:16:07,105 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 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 13:16:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:08,273 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2021-05-02 13:16:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 13:16:08,273 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 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 91 [2021-05-02 13:16:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:08,274 INFO L225 Difference]: With dead ends: 118 [2021-05-02 13:16:08,274 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 13:16:08,275 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1463.5ms TimeCoverageRelationStatistics Valid=1718, Invalid=2838, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 13:16:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 13:16:08,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-05-02 13:16:08,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 89 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 13:16:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-05-02 13:16:08,279 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 91 [2021-05-02 13:16:08,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:08,279 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-05-02 13:16:08,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 states have internal predecessors, (77), 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 13:16:08,279 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-05-02 13:16:08,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-02 13:16:08,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:08,280 INFO L523 BasicCegarLoop]: trace histogram [41, 32, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:08,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-05-02 13:16:08,481 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -411276330, now seen corresponding path program 29 times [2021-05-02 13:16:08,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:08,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258373795] [2021-05-02 13:16:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:09,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 13:16:09,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:09,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258373795] [2021-05-02 13:16:09,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258373795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:09,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957367706] [2021-05-02 13:16:09,033 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 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 13:16:09,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-05-02 13:16:09,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:09,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:16:09,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:09,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 561 proven. 1056 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 13:16:09,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957367706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:09,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:09,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2021-05-02 13:16:09,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549439797] [2021-05-02 13:16:09,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 13:16:09,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:09,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 13:16:09,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 13:16:09,317 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 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 13:16:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:10,506 INFO L93 Difference]: Finished difference Result 120 states and 139 transitions. [2021-05-02 13:16:10,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 13:16:10,506 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 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 93 [2021-05-02 13:16:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:10,507 INFO L225 Difference]: With dead ends: 120 [2021-05-02 13:16:10,507 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 13:16:10,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1565.9ms TimeCoverageRelationStatistics Valid=1821, Invalid=3009, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:16:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 13:16:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-05-02 13:16:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 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 13:16:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2021-05-02 13:16:10,512 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 93 [2021-05-02 13:16:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:10,512 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2021-05-02 13:16:10,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.135135135135135) internal successors, (79), 36 states have internal predecessors, (79), 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 13:16:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2021-05-02 13:16:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 13:16:10,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:10,513 INFO L523 BasicCegarLoop]: trace histogram [42, 33, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:10,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:10,725 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:10,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:10,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1137489395, now seen corresponding path program 30 times [2021-05-02 13:16:10,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:10,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749274376] [2021-05-02 13:16:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:11,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:11,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:11,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 578 proven. 1122 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-02 13:16:11,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:11,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749274376] [2021-05-02 13:16:11,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749274376] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:11,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270041967] [2021-05-02 13:16:11,274 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 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 13:16:11,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 39 check-sat command(s) [2021-05-02 13:16:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 13:16:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:11,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 627 proven. 81 refuted. 0 times theorem prover too weak. 1056 trivial. 0 not checked. [2021-05-02 13:16:11,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270041967] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:11,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:11,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 12] total 47 [2021-05-02 13:16:11,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767259108] [2021-05-02 13:16:11,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 13:16:11,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:11,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 13:16:11,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 13:16:11,794 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 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 13:16:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:13,591 INFO L93 Difference]: Finished difference Result 125 states and 147 transitions. [2021-05-02 13:16:13,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 13:16:13,592 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 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 95 [2021-05-02 13:16:13,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:13,592 INFO L225 Difference]: With dead ends: 125 [2021-05-02 13:16:13,592 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 13:16:13,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 979 ImplicationChecksByTransitivity, 2381.2ms TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 13:16:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 13:16:13,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2021-05-02 13:16:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.1157894736842104) internal successors, (106), 95 states have internal predecessors, (106), 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 13:16:13,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2021-05-02 13:16:13,598 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 95 [2021-05-02 13:16:13,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:13,598 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2021-05-02 13:16:13,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.148936170212766) internal successors, (101), 46 states have internal predecessors, (101), 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 13:16:13,598 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2021-05-02 13:16:13,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-02 13:16:13,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:13,599 INFO L523 BasicCegarLoop]: trace histogram [44, 34, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:13,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-02 13:16:13,813 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1914044885, now seen corresponding path program 31 times [2021-05-02 13:16:13,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:13,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055504487] [2021-05-02 13:16:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:14,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 13:16:14,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:14,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055504487] [2021-05-02 13:16:14,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055504487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:14,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459516341] [2021-05-02 13:16:14,430 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 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 13:16:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:14,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 13:16:14,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:14,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 665 proven. 1190 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 13:16:14,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459516341] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:14,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:14,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2021-05-02 13:16:14,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828018203] [2021-05-02 13:16:14,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 13:16:14,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:14,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 13:16:14,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 13:16:14,673 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 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 13:16:15,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:15,972 INFO L93 Difference]: Finished difference Result 128 states and 149 transitions. [2021-05-02 13:16:15,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 13:16:15,973 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 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 99 [2021-05-02 13:16:15,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:15,973 INFO L225 Difference]: With dead ends: 128 [2021-05-02 13:16:15,973 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 13:16:15,974 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1735.5ms TimeCoverageRelationStatistics Valid=2036, Invalid=3366, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 13:16:15,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 13:16:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-05-02 13:16:15,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 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 13:16:15,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2021-05-02 13:16:15,979 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 99 [2021-05-02 13:16:15,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:15,979 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2021-05-02 13:16:15,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 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 13:16:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2021-05-02 13:16:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-02 13:16:15,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:15,980 INFO L523 BasicCegarLoop]: trace histogram [45, 35, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:16,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-02 13:16:16,185 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:16,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:16,185 INFO L82 PathProgramCache]: Analyzing trace with hash -110133624, now seen corresponding path program 32 times [2021-05-02 13:16:16,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:16,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953930527] [2021-05-02 13:16:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:16,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 13:16:16,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:16,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953930527] [2021-05-02 13:16:16,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953930527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:16,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081089580] [2021-05-02 13:16:16,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:16,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:16:16,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:16,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:16:16,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:16,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:16,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 684 proven. 1260 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 13:16:17,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081089580] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:17,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:17,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2021-05-02 13:16:17,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259982008] [2021-05-02 13:16:17,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 13:16:17,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:17,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 13:16:17,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 13:16:17,017 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 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 13:16:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:18,393 INFO L93 Difference]: Finished difference Result 130 states and 151 transitions. [2021-05-02 13:16:18,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 13:16:18,395 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 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 101 [2021-05-02 13:16:18,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:18,396 INFO L225 Difference]: With dead ends: 130 [2021-05-02 13:16:18,396 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 13:16:18,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1725.6ms TimeCoverageRelationStatistics Valid=2148, Invalid=3552, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:16:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 13:16:18,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-05-02 13:16:18,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.1111111111111112) internal successors, (110), 99 states have internal predecessors, (110), 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 13:16:18,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 114 transitions. [2021-05-02 13:16:18,402 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 114 transitions. Word has length 101 [2021-05-02 13:16:18,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:18,403 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 114 transitions. [2021-05-02 13:16:18,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 states have internal predecessors, (85), 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 13:16:18,403 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 114 transitions. [2021-05-02 13:16:18,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 13:16:18,403 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:18,403 INFO L523 BasicCegarLoop]: trace histogram [46, 36, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:18,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 13:16:18,625 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:18,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1718199387, now seen corresponding path program 33 times [2021-05-02 13:16:18,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:18,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297030064] [2021-05-02 13:16:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:18,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:19,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 703 proven. 1332 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 13:16:19,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:19,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297030064] [2021-05-02 13:16:19,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297030064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:19,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79944853] [2021-05-02 13:16:19,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:19,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-05-02 13:16:19,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:19,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 13:16:19,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:19,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:19,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 756 proven. 100 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2021-05-02 13:16:19,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79944853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:19,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:19,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 13] total 51 [2021-05-02 13:16:19,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716843174] [2021-05-02 13:16:19,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 13:16:19,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:19,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 13:16:19,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 13:16:19,923 INFO L87 Difference]: Start difference. First operand 104 states and 114 transitions. Second operand has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 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 13:16:22,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:22,239 INFO L93 Difference]: Finished difference Result 135 states and 159 transitions. [2021-05-02 13:16:22,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 13:16:22,240 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 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 103 [2021-05-02 13:16:22,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:22,241 INFO L225 Difference]: With dead ends: 135 [2021-05-02 13:16:22,241 INFO L226 Difference]: Without dead ends: 109 [2021-05-02 13:16:22,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 3063.9ms TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 13:16:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-02 13:16:22,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2021-05-02 13:16:22,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.116504854368932) internal successors, (115), 103 states have internal predecessors, (115), 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 13:16:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2021-05-02 13:16:22,247 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 103 [2021-05-02 13:16:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:22,247 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2021-05-02 13:16:22,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.1372549019607843) internal successors, (109), 50 states have internal predecessors, (109), 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 13:16:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2021-05-02 13:16:22,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 13:16:22,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:22,248 INFO L523 BasicCegarLoop]: trace histogram [48, 37, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:22,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 13:16:22,473 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash 406196829, now seen corresponding path program 34 times [2021-05-02 13:16:22,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:22,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144845486] [2021-05-02 13:16:22,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:23,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:23,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:16:23,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:23,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144845486] [2021-05-02 13:16:23,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144845486] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:23,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11776413] [2021-05-02 13:16:23,134 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 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 13:16:23,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:16:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 13:16:23,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:23,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 798 proven. 1406 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:16:23,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11776413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:23,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:23,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 42 [2021-05-02 13:16:23,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639650133] [2021-05-02 13:16:23,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 13:16:23,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:23,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 13:16:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 13:16:23,407 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 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 13:16:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:24,937 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2021-05-02 13:16:24,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 13:16:24,937 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 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 107 [2021-05-02 13:16:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:24,938 INFO L225 Difference]: With dead ends: 138 [2021-05-02 13:16:24,938 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 13:16:24,939 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 848 ImplicationChecksByTransitivity, 1982.1ms TimeCoverageRelationStatistics Valid=2381, Invalid=3939, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 13:16:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 13:16:24,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 13:16:24,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.1142857142857143) internal successors, (117), 105 states have internal predecessors, (117), 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 13:16:24,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-02 13:16:24,944 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 107 [2021-05-02 13:16:24,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:24,944 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-02 13:16:24,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 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 13:16:24,944 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-02 13:16:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-02 13:16:24,945 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:24,945 INFO L523 BasicCegarLoop]: trace histogram [49, 38, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:25,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-02 13:16:25,169 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1125639610, now seen corresponding path program 35 times [2021-05-02 13:16:25,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:25,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485411843] [2021-05-02 13:16:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:25,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:16:25,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:25,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485411843] [2021-05-02 13:16:25,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485411843] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:25,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863199148] [2021-05-02 13:16:25,901 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 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 13:16:25,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 50 check-sat command(s) [2021-05-02 13:16:25,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:25,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 13:16:25,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:25,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:25,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:25,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:25,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 819 proven. 1482 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:16:26,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863199148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:26,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:26,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 43 [2021-05-02 13:16:26,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290068745] [2021-05-02 13:16:26,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 13:16:26,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:26,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 13:16:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 13:16:26,215 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 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 13:16:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:27,774 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2021-05-02 13:16:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 13:16:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 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 109 [2021-05-02 13:16:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:27,775 INFO L225 Difference]: With dead ends: 140 [2021-05-02 13:16:27,775 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 13:16:27,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 2019.9ms TimeCoverageRelationStatistics Valid=2502, Invalid=4140, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:16:27,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 13:16:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 13:16:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 107 states have internal predecessors, (119), 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 13:16:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2021-05-02 13:16:27,780 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 123 transitions. Word has length 109 [2021-05-02 13:16:27,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:27,780 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 123 transitions. [2021-05-02 13:16:27,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 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 13:16:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 123 transitions. [2021-05-02 13:16:27,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 13:16:27,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:27,781 INFO L523 BasicCegarLoop]: trace histogram [50, 39, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:28,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 13:16:28,006 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:28,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1020417495, now seen corresponding path program 36 times [2021-05-02 13:16:28,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:28,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026873930] [2021-05-02 13:16:28,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:28,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:28,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 840 proven. 1560 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-05-02 13:16:28,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:28,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026873930] [2021-05-02 13:16:28,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026873930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:28,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003632081] [2021-05-02 13:16:28,756 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 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 13:16:28,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2021-05-02 13:16:28,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:28,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 13:16:28,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:28,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:28,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 897 proven. 121 refuted. 0 times theorem prover too weak. 1482 trivial. 0 not checked. [2021-05-02 13:16:29,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003632081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:29,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:29,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 14] total 55 [2021-05-02 13:16:29,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388901899] [2021-05-02 13:16:29,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 13:16:29,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:29,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 13:16:29,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 13:16:29,429 INFO L87 Difference]: Start difference. First operand 112 states and 123 transitions. Second operand has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 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 13:16:32,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:32,082 INFO L93 Difference]: Finished difference Result 145 states and 171 transitions. [2021-05-02 13:16:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 13:16:32,082 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 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 111 [2021-05-02 13:16:32,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:32,083 INFO L225 Difference]: With dead ends: 145 [2021-05-02 13:16:32,083 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 13:16:32,084 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 3435.3ms TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 13:16:32,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 13:16:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-05-02 13:16:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.117117117117117) internal successors, (124), 111 states have internal predecessors, (124), 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 13:16:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-05-02 13:16:32,089 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 111 [2021-05-02 13:16:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:32,089 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-05-02 13:16:32,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 54 states have internal predecessors, (117), 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 13:16:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-05-02 13:16:32,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-02 13:16:32,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:32,090 INFO L523 BasicCegarLoop]: trace histogram [52, 40, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:32,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-02 13:16:32,305 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1273912079, now seen corresponding path program 37 times [2021-05-02 13:16:32,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:32,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226437295] [2021-05-02 13:16:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:33,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:33,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 13:16:33,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226437295] [2021-05-02 13:16:33,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226437295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:33,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099640445] [2021-05-02 13:16:33,154 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 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 13:16:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:33,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 13:16:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:33,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 943 proven. 1640 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 13:16:33,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099640445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:33,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:33,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 45 [2021-05-02 13:16:33,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485719663] [2021-05-02 13:16:33,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 13:16:33,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:33,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 13:16:33,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 13:16:33,459 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 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 13:16:35,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:35,139 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2021-05-02 13:16:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 13:16:35,139 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 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 115 [2021-05-02 13:16:35,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:35,140 INFO L225 Difference]: With dead ends: 148 [2021-05-02 13:16:35,140 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 13:16:35,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 2243.8ms TimeCoverageRelationStatistics Valid=2753, Invalid=4557, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 13:16:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 13:16:35,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-05-02 13:16:35,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.1150442477876106) internal successors, (126), 113 states have internal predecessors, (126), 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 13:16:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2021-05-02 13:16:35,151 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 115 [2021-05-02 13:16:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:35,151 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2021-05-02 13:16:35,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.111111111111111) internal successors, (95), 44 states have internal predecessors, (95), 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 13:16:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2021-05-02 13:16:35,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-05-02 13:16:35,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:35,152 INFO L523 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:35,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:35,361 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:35,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1244234092, now seen corresponding path program 38 times [2021-05-02 13:16:35,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:35,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264541062] [2021-05-02 13:16:35,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:36,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 13:16:36,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:36,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264541062] [2021-05-02 13:16:36,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264541062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:36,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143238581] [2021-05-02 13:16:36,208 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 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 13:16:36,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:16:36,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 13:16:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:36,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 966 proven. 1722 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 13:16:36,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143238581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:36,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:36,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 46 [2021-05-02 13:16:36,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759054577] [2021-05-02 13:16:36,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 13:16:36,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 13:16:36,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 13:16:36,520 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 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 13:16:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:38,247 INFO L93 Difference]: Finished difference Result 150 states and 175 transitions. [2021-05-02 13:16:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 13:16:38,248 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 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 117 [2021-05-02 13:16:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:38,248 INFO L225 Difference]: With dead ends: 150 [2021-05-02 13:16:38,248 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 13:16:38,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 2310.6ms TimeCoverageRelationStatistics Valid=2883, Invalid=4773, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:16:38,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 13:16:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-05-02 13:16:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.1130434782608696) internal successors, (128), 115 states have internal predecessors, (128), 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 13:16:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2021-05-02 13:16:38,254 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 117 [2021-05-02 13:16:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:38,255 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2021-05-02 13:16:38,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 states have internal predecessors, (97), 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 13:16:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2021-05-02 13:16:38,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-05-02 13:16:38,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:38,256 INFO L523 BasicCegarLoop]: trace histogram [54, 42, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:38,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:38,456 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:38,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1506507639, now seen corresponding path program 39 times [2021-05-02 13:16:38,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:38,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826260161] [2021-05-02 13:16:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:39,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 989 proven. 1806 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-02 13:16:39,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:39,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826260161] [2021-05-02 13:16:39,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826260161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:39,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380569511] [2021-05-02 13:16:39,254 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 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 13:16:39,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2021-05-02 13:16:39,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:39,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 13:16:39,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:39,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:39,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 1050 proven. 144 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2021-05-02 13:16:39,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380569511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:39,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:39,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 15] total 59 [2021-05-02 13:16:39,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422776770] [2021-05-02 13:16:39,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 13:16:39,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:39,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 13:16:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 13:16:39,970 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 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 13:16:42,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:42,631 INFO L93 Difference]: Finished difference Result 155 states and 183 transitions. [2021-05-02 13:16:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 13:16:42,632 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 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 119 [2021-05-02 13:16:42,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:42,632 INFO L225 Difference]: With dead ends: 155 [2021-05-02 13:16:42,633 INFO L226 Difference]: Without dead ends: 125 [2021-05-02 13:16:42,634 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1582 ImplicationChecksByTransitivity, 3631.9ms TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 13:16:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-05-02 13:16:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-05-02 13:16:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.1176470588235294) internal successors, (133), 119 states have internal predecessors, (133), 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 13:16:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 137 transitions. [2021-05-02 13:16:42,639 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 137 transitions. Word has length 119 [2021-05-02 13:16:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:42,639 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 137 transitions. [2021-05-02 13:16:42,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.1186440677966103) internal successors, (125), 58 states have internal predecessors, (125), 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 13:16:42,640 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 137 transitions. [2021-05-02 13:16:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-02 13:16:42,640 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:42,640 INFO L523 BasicCegarLoop]: trace histogram [56, 43, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:42,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:42,849 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1219577791, now seen corresponding path program 40 times [2021-05-02 13:16:42,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:42,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838497790] [2021-05-02 13:16:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:43,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:43,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 13:16:43,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:43,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838497790] [2021-05-02 13:16:43,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838497790] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:43,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240256668] [2021-05-02 13:16:43,874 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 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 13:16:43,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:16:43,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 13:16:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:43,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:43,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:44,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 1100 proven. 1892 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 13:16:44,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240256668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:44,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:44,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 48 [2021-05-02 13:16:44,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48663049] [2021-05-02 13:16:44,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 13:16:44,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:44,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 13:16:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 13:16:44,166 INFO L87 Difference]: Start difference. First operand 124 states and 137 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 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 13:16:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:45,954 INFO L93 Difference]: Finished difference Result 158 states and 185 transitions. [2021-05-02 13:16:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 13:16:45,954 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 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 123 [2021-05-02 13:16:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:45,955 INFO L225 Difference]: With dead ends: 158 [2021-05-02 13:16:45,955 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 13:16:45,956 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 2473.7ms TimeCoverageRelationStatistics Valid=3152, Invalid=5220, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 13:16:45,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 13:16:45,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-05-02 13:16:45,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.115702479338843) internal successors, (135), 121 states have internal predecessors, (135), 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 13:16:45,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 139 transitions. [2021-05-02 13:16:45,962 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 139 transitions. Word has length 123 [2021-05-02 13:16:45,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:45,962 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 139 transitions. [2021-05-02 13:16:45,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 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 13:16:45,962 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 139 transitions. [2021-05-02 13:16:45,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-02 13:16:45,963 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:45,963 INFO L523 BasicCegarLoop]: trace histogram [57, 44, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:46,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-05-02 13:16:46,177 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1340092830, now seen corresponding path program 41 times [2021-05-02 13:16:46,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:46,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431939278] [2021-05-02 13:16:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:47,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:47,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 13:16:47,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:47,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431939278] [2021-05-02 13:16:47,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431939278] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:47,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836481214] [2021-05-02 13:16:47,078 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 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 13:16:47,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 58 check-sat command(s) [2021-05-02 13:16:47,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:47,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-02 13:16:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:47,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:47,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 1125 proven. 1980 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 13:16:47,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836481214] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:47,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:47,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47] total 49 [2021-05-02 13:16:47,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875075957] [2021-05-02 13:16:47,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 13:16:47,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:47,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 13:16:47,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 13:16:47,378 INFO L87 Difference]: Start difference. First operand 126 states and 139 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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 13:16:49,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:49,357 INFO L93 Difference]: Finished difference Result 160 states and 187 transitions. [2021-05-02 13:16:49,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 13:16:49,357 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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 125 [2021-05-02 13:16:49,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:49,358 INFO L225 Difference]: With dead ends: 160 [2021-05-02 13:16:49,358 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 13:16:49,358 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 2562.8ms TimeCoverageRelationStatistics Valid=3291, Invalid=5451, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:16:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 13:16:49,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2021-05-02 13:16:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 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 13:16:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2021-05-02 13:16:49,364 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 125 [2021-05-02 13:16:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:49,365 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2021-05-02 13:16:49,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 48 states have internal predecessors, (103), 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 13:16:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2021-05-02 13:16:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-05-02 13:16:49,365 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:49,366 INFO L523 BasicCegarLoop]: trace histogram [58, 45, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:49,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:49,589 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:49,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:49,590 INFO L82 PathProgramCache]: Analyzing trace with hash 167299003, now seen corresponding path program 42 times [2021-05-02 13:16:49,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:49,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219083684] [2021-05-02 13:16:49,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:50,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1150 proven. 2070 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 13:16:50,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:50,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219083684] [2021-05-02 13:16:50,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219083684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:50,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273521503] [2021-05-02 13:16:50,634 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 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 13:16:50,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-05-02 13:16:50,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 13:16:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:50,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:50,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:50,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:50,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:50,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:50,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:51,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 1215 proven. 169 refuted. 0 times theorem prover too weak. 1980 trivial. 0 not checked. [2021-05-02 13:16:51,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273521503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:51,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:51,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 16] total 63 [2021-05-02 13:16:51,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105484079] [2021-05-02 13:16:51,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 13:16:51,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 13:16:51,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 13:16:51,520 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 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 13:16:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:54,524 INFO L93 Difference]: Finished difference Result 165 states and 195 transitions. [2021-05-02 13:16:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 13:16:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 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 127 [2021-05-02 13:16:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:54,525 INFO L225 Difference]: With dead ends: 165 [2021-05-02 13:16:54,525 INFO L226 Difference]: Without dead ends: 133 [2021-05-02 13:16:54,526 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 4211.9ms TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 13:16:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-02 13:16:54,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-05-02 13:16:54,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.1181102362204725) internal successors, (142), 127 states have internal predecessors, (142), 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 13:16:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2021-05-02 13:16:54,532 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 127 [2021-05-02 13:16:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:54,532 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2021-05-02 13:16:54,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.111111111111111) internal successors, (133), 62 states have internal predecessors, (133), 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 13:16:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2021-05-02 13:16:54,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-05-02 13:16:54,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:54,533 INFO L523 BasicCegarLoop]: trace histogram [60, 46, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:54,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:54,753 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:54,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:54,753 INFO L82 PathProgramCache]: Analyzing trace with hash -501544461, now seen corresponding path program 43 times [2021-05-02 13:16:54,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:54,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531565477] [2021-05-02 13:16:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:55,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:16:55,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531565477] [2021-05-02 13:16:55,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531565477] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:55,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894441073] [2021-05-02 13:16:55,793 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 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 13:16:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:55,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 13:16:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:55,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:55,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 1269 proven. 2162 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:16:56,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894441073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:56,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:56,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49] total 51 [2021-05-02 13:16:56,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890452841] [2021-05-02 13:16:56,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 13:16:56,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:56,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 13:16:56,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 13:16:56,098 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 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 13:16:58,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:16:58,113 INFO L93 Difference]: Finished difference Result 168 states and 197 transitions. [2021-05-02 13:16:58,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 13:16:58,113 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 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 131 [2021-05-02 13:16:58,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:16:58,114 INFO L225 Difference]: With dead ends: 168 [2021-05-02 13:16:58,114 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 13:16:58,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 2774.6ms TimeCoverageRelationStatistics Valid=3578, Invalid=5928, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 13:16:58,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 13:16:58,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2021-05-02 13:16:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.1162790697674418) internal successors, (144), 129 states have internal predecessors, (144), 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 13:16:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 148 transitions. [2021-05-02 13:16:58,119 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 148 transitions. Word has length 131 [2021-05-02 13:16:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:16:58,120 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 148 transitions. [2021-05-02 13:16:58,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 50 states have internal predecessors, (107), 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 13:16:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 148 transitions. [2021-05-02 13:16:58,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-02 13:16:58,121 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:16:58,121 INFO L523 BasicCegarLoop]: trace histogram [61, 47, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:16:58,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 13:16:58,337 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:16:58,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:16:58,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1895836080, now seen corresponding path program 44 times [2021-05-02 13:16:58,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:16:58,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035162235] [2021-05-02 13:16:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:16:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:59,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:16:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:16:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:16:59,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:16:59,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035162235] [2021-05-02 13:16:59,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035162235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:59,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831169569] [2021-05-02 13:16:59,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:16:59,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:16:59,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:16:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 13:16:59,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:16:59,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:16:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1296 proven. 2256 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:16:59,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831169569] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:16:59,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:16:59,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 52 [2021-05-02 13:16:59,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087950690] [2021-05-02 13:16:59,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 13:16:59,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:16:59,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 13:16:59,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 13:16:59,695 INFO L87 Difference]: Start difference. First operand 134 states and 148 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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 13:17:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:01,712 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2021-05-02 13:17:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 13:17:01,713 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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 133 [2021-05-02 13:17:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:01,714 INFO L225 Difference]: With dead ends: 170 [2021-05-02 13:17:01,714 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 13:17:01,714 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 2859.1ms TimeCoverageRelationStatistics Valid=3726, Invalid=6174, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:17:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 13:17:01,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-02 13:17:01,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 131 states have internal predecessors, (146), 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 13:17:01,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2021-05-02 13:17:01,719 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 150 transitions. Word has length 133 [2021-05-02 13:17:01,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:01,719 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 150 transitions. [2021-05-02 13:17:01,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 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 13:17:01,719 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 150 transitions. [2021-05-02 13:17:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-05-02 13:17:01,720 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:01,720 INFO L523 BasicCegarLoop]: trace histogram [62, 48, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:01,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-02 13:17:01,921 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:01,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:01,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1780285587, now seen corresponding path program 45 times [2021-05-02 13:17:01,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:01,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439316309] [2021-05-02 13:17:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:02,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1323 proven. 2352 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 13:17:02,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439316309] [2021-05-02 13:17:02,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439316309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:02,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881262830] [2021-05-02 13:17:02,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:03,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-05-02 13:17:03,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:03,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:17:03,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:03,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 1392 proven. 196 refuted. 0 times theorem prover too weak. 2256 trivial. 0 not checked. [2021-05-02 13:17:03,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881262830] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:03,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:03,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 17] total 67 [2021-05-02 13:17:03,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058068370] [2021-05-02 13:17:03,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 13:17:03,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:03,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 13:17:03,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 13:17:03,900 INFO L87 Difference]: Start difference. First operand 136 states and 150 transitions. Second operand has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 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 13:17:07,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:07,168 INFO L93 Difference]: Finished difference Result 175 states and 207 transitions. [2021-05-02 13:17:07,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 13:17:07,168 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 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 135 [2021-05-02 13:17:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:07,169 INFO L225 Difference]: With dead ends: 175 [2021-05-02 13:17:07,169 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 13:17:07,170 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 4671.5ms TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 13:17:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 13:17:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-05-02 13:17:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.1185185185185185) internal successors, (151), 135 states have internal predecessors, (151), 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 13:17:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 155 transitions. [2021-05-02 13:17:07,175 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 155 transitions. Word has length 135 [2021-05-02 13:17:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:07,175 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 155 transitions. [2021-05-02 13:17:07,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.1044776119402986) internal successors, (141), 66 states have internal predecessors, (141), 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 13:17:07,175 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 155 transitions. [2021-05-02 13:17:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-02 13:17:07,176 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:07,176 INFO L523 BasicCegarLoop]: trace histogram [64, 49, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:07,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-05-02 13:17:07,377 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:07,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:07,388 INFO L82 PathProgramCache]: Analyzing trace with hash 194981925, now seen corresponding path program 46 times [2021-05-02 13:17:07,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:07,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517089268] [2021-05-02 13:17:07,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:08,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 13:17:08,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:08,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517089268] [2021-05-02 13:17:08,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517089268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:08,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009680930] [2021-05-02 13:17:08,564 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 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 13:17:08,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:17:08,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:08,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 13:17:08,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:08,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 1450 proven. 2450 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 13:17:08,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009680930] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:08,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:08,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 54 [2021-05-02 13:17:08,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622592297] [2021-05-02 13:17:08,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 13:17:08,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:08,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 13:17:08,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 13:17:08,871 INFO L87 Difference]: Start difference. First operand 140 states and 155 transitions. Second operand has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 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 13:17:11,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:11,082 INFO L93 Difference]: Finished difference Result 178 states and 209 transitions. [2021-05-02 13:17:11,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 13:17:11,082 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 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 139 [2021-05-02 13:17:11,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:11,083 INFO L225 Difference]: With dead ends: 178 [2021-05-02 13:17:11,083 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 13:17:11,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 3019.0ms TimeCoverageRelationStatistics Valid=4031, Invalid=6681, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 13:17:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 13:17:11,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-02 13:17:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.1167883211678833) internal successors, (153), 137 states have internal predecessors, (153), 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 13:17:11,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2021-05-02 13:17:11,089 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 139 [2021-05-02 13:17:11,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:11,089 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2021-05-02 13:17:11,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 53 states have internal predecessors, (113), 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 13:17:11,089 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2021-05-02 13:17:11,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-05-02 13:17:11,090 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:11,090 INFO L523 BasicCegarLoop]: trace histogram [65, 50, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:11,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:11,313 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:11,313 INFO L82 PathProgramCache]: Analyzing trace with hash -103526526, now seen corresponding path program 47 times [2021-05-02 13:17:11,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:11,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588211863] [2021-05-02 13:17:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:12,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1479 proven. 2550 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 13:17:12,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588211863] [2021-05-02 13:17:12,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588211863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:12,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119139458] [2021-05-02 13:17:12,846 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 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 13:17:12,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-05-02 13:17:12,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:12,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 13:17:12,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:12,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:12,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 1479 proven. 2550 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 13:17:13,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119139458] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:13,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:13,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53] total 55 [2021-05-02 13:17:13,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777556999] [2021-05-02 13:17:13,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 13:17:13,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:13,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 13:17:13,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 13:17:13,234 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 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 13:17:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:16,169 INFO L93 Difference]: Finished difference Result 180 states and 211 transitions. [2021-05-02 13:17:16,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 13:17:16,170 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 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 141 [2021-05-02 13:17:16,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:16,171 INFO L225 Difference]: With dead ends: 180 [2021-05-02 13:17:16,171 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 13:17:16,172 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1472 ImplicationChecksByTransitivity, 4009.1ms TimeCoverageRelationStatistics Valid=4188, Invalid=6942, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:17:16,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 13:17:16,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2021-05-02 13:17:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.1151079136690647) internal successors, (155), 139 states have internal predecessors, (155), 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 13:17:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2021-05-02 13:17:16,178 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 159 transitions. Word has length 141 [2021-05-02 13:17:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:16,178 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 159 transitions. [2021-05-02 13:17:16,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.090909090909091) internal successors, (115), 54 states have internal predecessors, (115), 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 13:17:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 159 transitions. [2021-05-02 13:17:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-05-02 13:17:16,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:16,179 INFO L523 BasicCegarLoop]: trace histogram [66, 51, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:16,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:16,402 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:16,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:16,402 INFO L82 PathProgramCache]: Analyzing trace with hash 792660895, now seen corresponding path program 48 times [2021-05-02 13:17:16,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:16,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370666407] [2021-05-02 13:17:16,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:17,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:17,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:17,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1508 proven. 2652 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-05-02 13:17:17,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370666407] [2021-05-02 13:17:17,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370666407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:17,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833006522] [2021-05-02 13:17:17,928 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 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 13:17:18,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2021-05-02 13:17:18,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:18,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 13:17:18,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:18,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:18,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:19,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 1581 proven. 225 refuted. 0 times theorem prover too weak. 2550 trivial. 0 not checked. [2021-05-02 13:17:19,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833006522] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:19,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:19,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 18] total 71 [2021-05-02 13:17:19,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019700907] [2021-05-02 13:17:19,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 13:17:19,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:19,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 13:17:19,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 13:17:19,087 INFO L87 Difference]: Start difference. First operand 144 states and 159 transitions. Second operand has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 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 13:17:22,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:22,698 INFO L93 Difference]: Finished difference Result 185 states and 219 transitions. [2021-05-02 13:17:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 13:17:22,699 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 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 143 [2021-05-02 13:17:22,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:22,700 INFO L225 Difference]: With dead ends: 185 [2021-05-02 13:17:22,700 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 13:17:22,701 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2329 ImplicationChecksByTransitivity, 5515.6ms TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 13:17:22,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 13:17:22,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-05-02 13:17:22,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.118881118881119) internal successors, (160), 143 states have internal predecessors, (160), 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 13:17:22,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 164 transitions. [2021-05-02 13:17:22,707 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 164 transitions. Word has length 143 [2021-05-02 13:17:22,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:22,708 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 164 transitions. [2021-05-02 13:17:22,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0985915492957745) internal successors, (149), 70 states have internal predecessors, (149), 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 13:17:22,708 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 164 transitions. [2021-05-02 13:17:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-05-02 13:17:22,709 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:22,709 INFO L523 BasicCegarLoop]: trace histogram [68, 52, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:22,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:22,925 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1756302039, now seen corresponding path program 49 times [2021-05-02 13:17:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:22,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034389687] [2021-05-02 13:17:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:24,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1643 proven. 2756 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-05-02 13:17:24,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:24,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034389687] [2021-05-02 13:17:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034389687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:24,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876381748] [2021-05-02 13:17:24,136 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 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 13:17:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:24,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 13:17:24,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:24,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 1643 proven. 2756 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-05-02 13:17:24,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876381748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:24,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:24,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 55] total 57 [2021-05-02 13:17:24,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556006031] [2021-05-02 13:17:24,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 13:17:24,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:24,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 13:17:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 13:17:24,450 INFO L87 Difference]: Start difference. First operand 148 states and 164 transitions. Second operand has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 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 13:17:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:26,797 INFO L93 Difference]: Finished difference Result 188 states and 221 transitions. [2021-05-02 13:17:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 13:17:26,797 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 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 147 [2021-05-02 13:17:26,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:26,798 INFO L225 Difference]: With dead ends: 188 [2021-05-02 13:17:26,798 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 13:17:26,798 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 3325.9ms TimeCoverageRelationStatistics Valid=4511, Invalid=7479, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 13:17:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 13:17:26,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-05-02 13:17:26,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 145 states have internal predecessors, (162), 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 13:17:26,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 166 transitions. [2021-05-02 13:17:26,803 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 166 transitions. Word has length 147 [2021-05-02 13:17:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:26,803 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 166 transitions. [2021-05-02 13:17:26,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.087719298245614) internal successors, (119), 56 states have internal predecessors, (119), 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 13:17:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 166 transitions. [2021-05-02 13:17:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-05-02 13:17:26,804 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:26,804 INFO L523 BasicCegarLoop]: trace histogram [69, 53, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:27,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:27,021 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash 2016509236, now seen corresponding path program 50 times [2021-05-02 13:17:27,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:27,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473080586] [2021-05-02 13:17:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:28,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:28,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1674 proven. 2862 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-05-02 13:17:28,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:28,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473080586] [2021-05-02 13:17:28,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473080586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:28,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838046119] [2021-05-02 13:17:28,307 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:28,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:17:28,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:28,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 55 conjunts are in the unsatisfiable core [2021-05-02 13:17:28,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:28,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 1674 proven. 2862 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-05-02 13:17:28,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838046119] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:28,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:28,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56] total 58 [2021-05-02 13:17:28,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470606574] [2021-05-02 13:17:28,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 13:17:28,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:28,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 13:17:28,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 13:17:28,711 INFO L87 Difference]: Start difference. First operand 150 states and 166 transitions. Second operand has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 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 13:17:31,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:31,366 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2021-05-02 13:17:31,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 13:17:31,367 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 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 149 [2021-05-02 13:17:31,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:31,367 INFO L225 Difference]: With dead ends: 190 [2021-05-02 13:17:31,368 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 13:17:31,368 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 3588.1ms TimeCoverageRelationStatistics Valid=4677, Invalid=7755, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 13:17:31,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 13:17:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-05-02 13:17:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.1156462585034013) internal successors, (164), 147 states have internal predecessors, (164), 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 13:17:31,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2021-05-02 13:17:31,373 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 149 [2021-05-02 13:17:31,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:31,373 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2021-05-02 13:17:31,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.086206896551724) internal successors, (121), 57 states have internal predecessors, (121), 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 13:17:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2021-05-02 13:17:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-02 13:17:31,374 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:31,374 INFO L523 BasicCegarLoop]: trace histogram [70, 54, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:31,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-05-02 13:17:31,575 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:31,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1327444911, now seen corresponding path program 51 times [2021-05-02 13:17:31,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:31,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426740655] [2021-05-02 13:17:31,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:32,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1705 proven. 2970 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-05-02 13:17:32,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:32,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426740655] [2021-05-02 13:17:32,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426740655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:32,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681017782] [2021-05-02 13:17:32,894 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:32,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-05-02 13:17:32,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:32,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:17:32,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:33,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:33,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1782 proven. 256 refuted. 0 times theorem prover too weak. 2862 trivial. 0 not checked. [2021-05-02 13:17:34,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681017782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:34,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:34,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 19] total 75 [2021-05-02 13:17:34,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721129152] [2021-05-02 13:17:34,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 13:17:34,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:34,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 13:17:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 13:17:34,008 INFO L87 Difference]: Start difference. First operand 152 states and 168 transitions. Second operand has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 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 13:17:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:38,270 INFO L93 Difference]: Finished difference Result 195 states and 231 transitions. [2021-05-02 13:17:38,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 13:17:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 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 151 [2021-05-02 13:17:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:38,271 INFO L225 Difference]: With dead ends: 195 [2021-05-02 13:17:38,271 INFO L226 Difference]: Without dead ends: 157 [2021-05-02 13:17:38,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2610 ImplicationChecksByTransitivity, 5961.9ms TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2021-05-02 13:17:38,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-02 13:17:38,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2021-05-02 13:17:38,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.119205298013245) internal successors, (169), 151 states have internal predecessors, (169), 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 13:17:38,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 173 transitions. [2021-05-02 13:17:38,277 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 173 transitions. Word has length 151 [2021-05-02 13:17:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:38,277 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 173 transitions. [2021-05-02 13:17:38,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0933333333333333) internal successors, (157), 74 states have internal predecessors, (157), 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 13:17:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 173 transitions. [2021-05-02 13:17:38,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-05-02 13:17:38,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:38,278 INFO L523 BasicCegarLoop]: trace histogram [72, 55, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:38,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:38,483 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:38,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:38,484 INFO L82 PathProgramCache]: Analyzing trace with hash -509183479, now seen corresponding path program 52 times [2021-05-02 13:17:38,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:38,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419197545] [2021-05-02 13:17:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:39,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1848 proven. 3080 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:17:39,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:39,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419197545] [2021-05-02 13:17:39,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419197545] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:39,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553491923] [2021-05-02 13:17:39,881 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:39,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:17:39,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 57 conjunts are in the unsatisfiable core [2021-05-02 13:17:39,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:39,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:39,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:40,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 1848 proven. 3080 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:17:40,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553491923] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:40,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:40,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58] total 60 [2021-05-02 13:17:40,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870690401] [2021-05-02 13:17:40,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 13:17:40,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:40,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 13:17:40,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 13:17:40,241 INFO L87 Difference]: Start difference. First operand 156 states and 173 transitions. Second operand has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 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 13:17:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:42,848 INFO L93 Difference]: Finished difference Result 198 states and 233 transitions. [2021-05-02 13:17:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 13:17:42,849 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 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 155 [2021-05-02 13:17:42,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:42,849 INFO L225 Difference]: With dead ends: 198 [2021-05-02 13:17:42,849 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 13:17:42,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 3728.7ms TimeCoverageRelationStatistics Valid=5018, Invalid=8322, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 13:17:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 13:17:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2021-05-02 13:17:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1176470588235294) internal successors, (171), 153 states have internal predecessors, (171), 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 13:17:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 175 transitions. [2021-05-02 13:17:42,855 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 175 transitions. Word has length 155 [2021-05-02 13:17:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:42,855 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 175 transitions. [2021-05-02 13:17:42,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0833333333333335) internal successors, (125), 59 states have internal predecessors, (125), 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 13:17:42,855 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 175 transitions. [2021-05-02 13:17:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-02 13:17:42,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:42,856 INFO L523 BasicCegarLoop]: trace histogram [73, 56, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:43,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-02 13:17:43,056 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:43,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1519173786, now seen corresponding path program 53 times [2021-05-02 13:17:43,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:43,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144320384] [2021-05-02 13:17:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:44,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1881 proven. 3192 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:17:44,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:44,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144320384] [2021-05-02 13:17:44,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144320384] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:44,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181844791] [2021-05-02 13:17:44,407 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:44,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 74 check-sat command(s) [2021-05-02 13:17:44,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:44,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-02 13:17:44,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:44,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 1881 proven. 3192 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:17:44,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181844791] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:44,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:44,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59] total 61 [2021-05-02 13:17:44,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225807364] [2021-05-02 13:17:44,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 13:17:44,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:44,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 13:17:44,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 13:17:44,761 INFO L87 Difference]: Start difference. First operand 158 states and 175 transitions. Second operand has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 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 13:17:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:47,440 INFO L93 Difference]: Finished difference Result 200 states and 235 transitions. [2021-05-02 13:17:47,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 13:17:47,440 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 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 157 [2021-05-02 13:17:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:47,441 INFO L225 Difference]: With dead ends: 200 [2021-05-02 13:17:47,441 INFO L226 Difference]: Without dead ends: 160 [2021-05-02 13:17:47,442 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 3729.9ms TimeCoverageRelationStatistics Valid=5193, Invalid=8613, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 13:17:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-02 13:17:47,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-05-02 13:17:47,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 155 states have internal predecessors, (173), 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 13:17:47,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 177 transitions. [2021-05-02 13:17:47,446 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 177 transitions. Word has length 157 [2021-05-02 13:17:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:47,446 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 177 transitions. [2021-05-02 13:17:47,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.081967213114754) internal successors, (127), 60 states have internal predecessors, (127), 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 13:17:47,447 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 177 transitions. [2021-05-02 13:17:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-05-02 13:17:47,447 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:47,447 INFO L523 BasicCegarLoop]: trace histogram [74, 57, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:47,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-02 13:17:47,648 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:47,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:47,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1457249917, now seen corresponding path program 54 times [2021-05-02 13:17:47,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:47,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500227831] [2021-05-02 13:17:47,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:47,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:49,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:49,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 1914 proven. 3306 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-05-02 13:17:49,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:49,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500227831] [2021-05-02 13:17:49,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500227831] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:49,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905538594] [2021-05-02 13:17:49,027 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:49,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 71 check-sat command(s) [2021-05-02 13:17:49,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:17:49,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 13:17:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:49,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:49,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 1995 proven. 289 refuted. 0 times theorem prover too weak. 3192 trivial. 0 not checked. [2021-05-02 13:17:50,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905538594] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:50,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:50,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 20] total 79 [2021-05-02 13:17:50,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902434241] [2021-05-02 13:17:50,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 13:17:50,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 13:17:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 13:17:50,274 INFO L87 Difference]: Start difference. First operand 160 states and 177 transitions. Second operand has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 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 13:17:54,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:54,597 INFO L93 Difference]: Finished difference Result 205 states and 243 transitions. [2021-05-02 13:17:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 13:17:54,597 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 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 159 [2021-05-02 13:17:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:54,598 INFO L225 Difference]: With dead ends: 205 [2021-05-02 13:17:54,598 INFO L226 Difference]: Without dead ends: 165 [2021-05-02 13:17:54,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2907 ImplicationChecksByTransitivity, 6218.6ms TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2021-05-02 13:17:54,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-05-02 13:17:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-05-02 13:17:54,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.119496855345912) internal successors, (178), 159 states have internal predecessors, (178), 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 13:17:54,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2021-05-02 13:17:54,607 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 159 [2021-05-02 13:17:54,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:54,607 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2021-05-02 13:17:54,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.088607594936709) internal successors, (165), 78 states have internal predecessors, (165), 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 13:17:54,607 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2021-05-02 13:17:54,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-05-02 13:17:54,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:54,608 INFO L523 BasicCegarLoop]: trace histogram [76, 58, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:17:54,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:54,813 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:17:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:17:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1349082555, now seen corresponding path program 55 times [2021-05-02 13:17:54,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:17:54,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935568714] [2021-05-02 13:17:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:17:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:56,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:17:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:56,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2065 proven. 3422 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-05-02 13:17:56,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:17:56,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935568714] [2021-05-02 13:17:56,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935568714] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:56,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357561126] [2021-05-02 13:17:56,350 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:17:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:17:56,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 60 conjunts are in the unsatisfiable core [2021-05-02 13:17:56,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:17:56,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:17:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 2065 proven. 3422 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-05-02 13:17:56,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357561126] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:17:56,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:17:56,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 61] total 63 [2021-05-02 13:17:56,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717814861] [2021-05-02 13:17:56,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 13:17:56,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:17:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 13:17:56,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 13:17:56,758 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 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 13:17:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:17:59,813 INFO L93 Difference]: Finished difference Result 208 states and 245 transitions. [2021-05-02 13:17:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 13:17:59,813 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 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 163 [2021-05-02 13:17:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:17:59,814 INFO L225 Difference]: With dead ends: 208 [2021-05-02 13:17:59,814 INFO L226 Difference]: Without dead ends: 166 [2021-05-02 13:17:59,815 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 4202.2ms TimeCoverageRelationStatistics Valid=5552, Invalid=9210, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 13:17:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-02 13:17:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2021-05-02 13:17:59,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.1180124223602483) internal successors, (180), 161 states have internal predecessors, (180), 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 13:17:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 184 transitions. [2021-05-02 13:17:59,829 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 184 transitions. Word has length 163 [2021-05-02 13:17:59,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:17:59,829 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 184 transitions. [2021-05-02 13:17:59,829 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 62 states have internal predecessors, (131), 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 13:17:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 184 transitions. [2021-05-02 13:17:59,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-05-02 13:17:59,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:17:59,831 INFO L523 BasicCegarLoop]: trace histogram [77, 59, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:00,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 13:18:00,031 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:00,032 INFO L82 PathProgramCache]: Analyzing trace with hash 243103256, now seen corresponding path program 56 times [2021-05-02 13:18:00,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:00,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451369652] [2021-05-02 13:18:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:01,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2100 proven. 3540 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-05-02 13:18:01,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:01,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451369652] [2021-05-02 13:18:01,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451369652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822786023] [2021-05-02 13:18:01,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:01,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:18:01,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 13:18:01,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:01,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:01,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:02,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2100 proven. 3540 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-05-02 13:18:02,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822786023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:02,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:02,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62] total 64 [2021-05-02 13:18:02,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995472375] [2021-05-02 13:18:02,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 13:18:02,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:02,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 13:18:02,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 13:18:02,047 INFO L87 Difference]: Start difference. First operand 166 states and 184 transitions. Second operand has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 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 13:18:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:05,112 INFO L93 Difference]: Finished difference Result 210 states and 247 transitions. [2021-05-02 13:18:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 13:18:05,112 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 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 165 [2021-05-02 13:18:05,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:05,113 INFO L225 Difference]: With dead ends: 210 [2021-05-02 13:18:05,113 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 13:18:05,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 4330.9ms TimeCoverageRelationStatistics Valid=5736, Invalid=9516, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 13:18:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 13:18:05,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-05-02 13:18:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.116564417177914) internal successors, (182), 163 states have internal predecessors, (182), 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 13:18:05,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 186 transitions. [2021-05-02 13:18:05,122 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 186 transitions. Word has length 165 [2021-05-02 13:18:05,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:05,122 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 186 transitions. [2021-05-02 13:18:05,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.078125) internal successors, (133), 63 states have internal predecessors, (133), 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 13:18:05,123 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 186 transitions. [2021-05-02 13:18:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-05-02 13:18:05,123 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:05,123 INFO L523 BasicCegarLoop]: trace histogram [78, 60, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:05,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:05,341 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1746080971, now seen corresponding path program 57 times [2021-05-02 13:18:05,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:05,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028841927] [2021-05-02 13:18:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:05,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:07,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:07,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2135 proven. 3660 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-05-02 13:18:07,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:07,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028841927] [2021-05-02 13:18:07,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028841927] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:07,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720144012] [2021-05-02 13:18:07,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:07,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2021-05-02 13:18:07,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:07,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 13:18:07,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:07,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:07,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 2220 proven. 324 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2021-05-02 13:18:08,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720144012] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:08,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:08,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 21] total 83 [2021-05-02 13:18:08,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742441284] [2021-05-02 13:18:08,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 13:18:08,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:08,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 13:18:08,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 13:18:08,448 INFO L87 Difference]: Start difference. First operand 168 states and 186 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 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 13:18:13,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:13,434 INFO L93 Difference]: Finished difference Result 215 states and 255 transitions. [2021-05-02 13:18:13,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 13:18:13,434 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 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 167 [2021-05-02 13:18:13,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:13,435 INFO L225 Difference]: With dead ends: 215 [2021-05-02 13:18:13,435 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 13:18:13,436 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3220 ImplicationChecksByTransitivity, 7301.0ms TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2021-05-02 13:18:13,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 13:18:13,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2021-05-02 13:18:13,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.1197604790419162) internal successors, (187), 167 states have internal predecessors, (187), 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 13:18:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 191 transitions. [2021-05-02 13:18:13,443 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 191 transitions. Word has length 167 [2021-05-02 13:18:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:13,443 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 191 transitions. [2021-05-02 13:18:13,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 82 states have internal predecessors, (173), 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 13:18:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 191 transitions. [2021-05-02 13:18:13,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-05-02 13:18:13,444 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:13,444 INFO L523 BasicCegarLoop]: trace histogram [80, 61, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:13,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-05-02 13:18:13,661 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:13,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:13,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1046713837, now seen corresponding path program 58 times [2021-05-02 13:18:13,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:13,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138188350] [2021-05-02 13:18:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:15,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2294 proven. 3782 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 13:18:15,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:15,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138188350] [2021-05-02 13:18:15,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138188350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:15,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024224496] [2021-05-02 13:18:15,306 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:15,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:18:15,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:15,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 13:18:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:15,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:15,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 2294 proven. 3782 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 13:18:15,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024224496] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:15,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:15,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 66 [2021-05-02 13:18:15,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667535289] [2021-05-02 13:18:15,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 13:18:15,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:15,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 13:18:15,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 13:18:15,729 INFO L87 Difference]: Start difference. First operand 172 states and 191 transitions. Second operand has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 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 13:18:19,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:19,005 INFO L93 Difference]: Finished difference Result 218 states and 257 transitions. [2021-05-02 13:18:19,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 13:18:19,005 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 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 171 [2021-05-02 13:18:19,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:19,006 INFO L225 Difference]: With dead ends: 218 [2021-05-02 13:18:19,006 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 13:18:19,007 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2132 ImplicationChecksByTransitivity, 4504.6ms TimeCoverageRelationStatistics Valid=6113, Invalid=10143, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 13:18:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 13:18:19,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-05-02 13:18:19,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.1183431952662721) internal successors, (189), 169 states have internal predecessors, (189), 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 13:18:19,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 193 transitions. [2021-05-02 13:18:19,014 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 193 transitions. Word has length 171 [2021-05-02 13:18:19,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:19,014 INFO L480 AbstractCegarLoop]: Abstraction has 174 states and 193 transitions. [2021-05-02 13:18:19,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0757575757575757) internal successors, (137), 65 states have internal predecessors, (137), 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 13:18:19,015 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 193 transitions. [2021-05-02 13:18:19,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-05-02 13:18:19,015 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:19,015 INFO L523 BasicCegarLoop]: trace histogram [81, 62, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:19,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:19,229 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:19,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:19,229 INFO L82 PathProgramCache]: Analyzing trace with hash -272891574, now seen corresponding path program 59 times [2021-05-02 13:18:19,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:19,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989649291] [2021-05-02 13:18:19,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:20,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2331 proven. 3906 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 13:18:20,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:20,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989649291] [2021-05-02 13:18:20,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989649291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:20,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949272549] [2021-05-02 13:18:20,895 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:21,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 82 check-sat command(s) [2021-05-02 13:18:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:21,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 64 conjunts are in the unsatisfiable core [2021-05-02 13:18:21,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:21,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 2331 proven. 3906 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 13:18:21,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949272549] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:21,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:21,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65] total 67 [2021-05-02 13:18:21,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706024547] [2021-05-02 13:18:21,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 13:18:21,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:21,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 13:18:21,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 13:18:21,326 INFO L87 Difference]: Start difference. First operand 174 states and 193 transitions. Second operand has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 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 13:18:24,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:24,627 INFO L93 Difference]: Finished difference Result 220 states and 259 transitions. [2021-05-02 13:18:24,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 13:18:24,628 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 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 173 [2021-05-02 13:18:24,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:24,629 INFO L225 Difference]: With dead ends: 220 [2021-05-02 13:18:24,629 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 13:18:24,629 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 4576.9ms TimeCoverageRelationStatistics Valid=6306, Invalid=10464, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 13:18:24,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 13:18:24,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2021-05-02 13:18:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.1169590643274854) internal successors, (191), 171 states have internal predecessors, (191), 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 13:18:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 195 transitions. [2021-05-02 13:18:24,635 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 195 transitions. Word has length 173 [2021-05-02 13:18:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:24,635 INFO L480 AbstractCegarLoop]: Abstraction has 176 states and 195 transitions. [2021-05-02 13:18:24,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.074626865671642) internal successors, (139), 66 states have internal predecessors, (139), 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 13:18:24,635 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 195 transitions. [2021-05-02 13:18:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-05-02 13:18:24,636 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:24,636 INFO L523 BasicCegarLoop]: trace histogram [82, 63, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:24,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-02 13:18:24,861 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:24,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:24,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1398339225, now seen corresponding path program 60 times [2021-05-02 13:18:24,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:24,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370803706] [2021-05-02 13:18:24,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:26,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:26,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2368 proven. 4032 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-05-02 13:18:26,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:26,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370803706] [2021-05-02 13:18:26,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370803706] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:26,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260982552] [2021-05-02 13:18:26,608 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:26,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-05-02 13:18:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:26,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:18:26,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:26,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:26,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:27,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:28,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 2457 proven. 361 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2021-05-02 13:18:28,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260982552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:28,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:28,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 22] total 87 [2021-05-02 13:18:28,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608361314] [2021-05-02 13:18:28,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 13:18:28,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:28,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 13:18:28,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 13:18:28,217 INFO L87 Difference]: Start difference. First operand 176 states and 195 transitions. Second operand has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 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 13:18:33,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:33,727 INFO L93 Difference]: Finished difference Result 225 states and 267 transitions. [2021-05-02 13:18:33,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 13:18:33,728 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 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 175 [2021-05-02 13:18:33,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:33,729 INFO L225 Difference]: With dead ends: 225 [2021-05-02 13:18:33,730 INFO L226 Difference]: Without dead ends: 181 [2021-05-02 13:18:33,731 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3549 ImplicationChecksByTransitivity, 7928.2ms TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2021-05-02 13:18:33,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-02 13:18:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-05-02 13:18:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.12) internal successors, (196), 175 states have internal predecessors, (196), 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 13:18:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 200 transitions. [2021-05-02 13:18:33,738 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 200 transitions. Word has length 175 [2021-05-02 13:18:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:33,738 INFO L480 AbstractCegarLoop]: Abstraction has 180 states and 200 transitions. [2021-05-02 13:18:33,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 86 states have internal predecessors, (181), 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 13:18:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 200 transitions. [2021-05-02 13:18:33,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-05-02 13:18:33,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:33,739 INFO L523 BasicCegarLoop]: trace histogram [84, 64, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:33,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:33,943 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:33,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:33,943 INFO L82 PathProgramCache]: Analyzing trace with hash 579404447, now seen corresponding path program 61 times [2021-05-02 13:18:33,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:33,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457464029] [2021-05-02 13:18:33,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:35,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2535 proven. 4160 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:18:35,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:35,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457464029] [2021-05-02 13:18:35,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457464029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:35,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33853519] [2021-05-02 13:18:35,947 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:36,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 66 conjunts are in the unsatisfiable core [2021-05-02 13:18:36,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:36,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 2535 proven. 4160 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:18:36,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33853519] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:36,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:36,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67] total 69 [2021-05-02 13:18:36,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292077137] [2021-05-02 13:18:36,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 13:18:36,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:36,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 13:18:36,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 13:18:36,465 INFO L87 Difference]: Start difference. First operand 180 states and 200 transitions. Second operand has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 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 13:18:40,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:40,055 INFO L93 Difference]: Finished difference Result 228 states and 269 transitions. [2021-05-02 13:18:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 13:18:40,056 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 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 179 [2021-05-02 13:18:40,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:40,057 INFO L225 Difference]: With dead ends: 228 [2021-05-02 13:18:40,057 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 13:18:40,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2333 ImplicationChecksByTransitivity, 5129.2ms TimeCoverageRelationStatistics Valid=6701, Invalid=11121, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 13:18:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 13:18:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2021-05-02 13:18:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.11864406779661) internal successors, (198), 177 states have internal predecessors, (198), 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 13:18:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 202 transitions. [2021-05-02 13:18:40,064 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 202 transitions. Word has length 179 [2021-05-02 13:18:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:40,064 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 202 transitions. [2021-05-02 13:18:40,064 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.072463768115942) internal successors, (143), 68 states have internal predecessors, (143), 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 13:18:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 202 transitions. [2021-05-02 13:18:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-05-02 13:18:40,066 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:40,066 INFO L523 BasicCegarLoop]: trace histogram [85, 65, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:40,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-02 13:18:40,268 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:40,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1931657468, now seen corresponding path program 62 times [2021-05-02 13:18:40,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:40,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894487209] [2021-05-02 13:18:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:40,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:42,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2574 proven. 4290 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:18:42,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:42,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894487209] [2021-05-02 13:18:42,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894487209] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:42,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503641397] [2021-05-02 13:18:42,304 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:42,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:18:42,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:42,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-02 13:18:42,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:42,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:42,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 2574 proven. 4290 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:18:42,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503641397] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:42,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:42,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68] total 70 [2021-05-02 13:18:42,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635821134] [2021-05-02 13:18:42,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 13:18:42,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:42,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 13:18:42,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 13:18:42,799 INFO L87 Difference]: Start difference. First operand 182 states and 202 transitions. Second operand has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 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 13:18:46,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:46,386 INFO L93 Difference]: Finished difference Result 230 states and 271 transitions. [2021-05-02 13:18:46,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 13:18:46,386 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 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 181 [2021-05-02 13:18:46,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:46,387 INFO L225 Difference]: With dead ends: 230 [2021-05-02 13:18:46,387 INFO L226 Difference]: Without dead ends: 184 [2021-05-02 13:18:46,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2402 ImplicationChecksByTransitivity, 5226.4ms TimeCoverageRelationStatistics Valid=6903, Invalid=11457, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 13:18:46,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-02 13:18:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-05-02 13:18:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.1173184357541899) internal successors, (200), 179 states have internal predecessors, (200), 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 13:18:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 204 transitions. [2021-05-02 13:18:46,396 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 204 transitions. Word has length 181 [2021-05-02 13:18:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:46,397 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 204 transitions. [2021-05-02 13:18:46,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0714285714285716) internal successors, (145), 69 states have internal predecessors, (145), 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 13:18:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 204 transitions. [2021-05-02 13:18:46,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-05-02 13:18:46,398 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:46,398 INFO L523 BasicCegarLoop]: trace histogram [86, 66, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:46,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:46,623 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:46,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:46,624 INFO L82 PathProgramCache]: Analyzing trace with hash 71719961, now seen corresponding path program 63 times [2021-05-02 13:18:46,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:46,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011196499] [2021-05-02 13:18:46,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:48,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 2613 proven. 4422 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-02 13:18:48,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:48,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011196499] [2021-05-02 13:18:48,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011196499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:48,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565822046] [2021-05-02 13:18:48,538 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:48,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-05-02 13:18:48,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:48,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:18:48,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:48,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:48,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:48,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:48,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:48,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:48,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:49,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:50,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 2706 proven. 400 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2021-05-02 13:18:50,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565822046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:50,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:50,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 23] total 91 [2021-05-02 13:18:50,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163246175] [2021-05-02 13:18:50,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 13:18:50,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:50,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 13:18:50,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 13:18:50,422 INFO L87 Difference]: Start difference. First operand 184 states and 204 transitions. Second operand has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 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 13:18:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:18:57,043 INFO L93 Difference]: Finished difference Result 235 states and 279 transitions. [2021-05-02 13:18:57,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 13:18:57,043 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 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 183 [2021-05-02 13:18:57,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:18:57,044 INFO L225 Difference]: With dead ends: 235 [2021-05-02 13:18:57,044 INFO L226 Difference]: Without dead ends: 189 [2021-05-02 13:18:57,045 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 9398.4ms TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2021-05-02 13:18:57,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-05-02 13:18:57,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2021-05-02 13:18:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.1202185792349726) internal successors, (205), 183 states have internal predecessors, (205), 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 13:18:57,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 209 transitions. [2021-05-02 13:18:57,053 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 209 transitions. Word has length 183 [2021-05-02 13:18:57,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:18:57,053 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 209 transitions. [2021-05-02 13:18:57,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.076923076923077) internal successors, (189), 90 states have internal predecessors, (189), 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 13:18:57,053 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 209 transitions. [2021-05-02 13:18:57,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-05-02 13:18:57,054 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:18:57,054 INFO L523 BasicCegarLoop]: trace histogram [88, 67, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:18:57,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-02 13:18:57,278 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:18:57,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:18:57,278 INFO L82 PathProgramCache]: Analyzing trace with hash 525698001, now seen corresponding path program 64 times [2021-05-02 13:18:57,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:18:57,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336299456] [2021-05-02 13:18:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:18:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:59,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:18:59,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:18:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2788 proven. 4556 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-05-02 13:18:59,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:18:59,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336299456] [2021-05-02 13:18:59,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336299456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:59,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962646002] [2021-05-02 13:18:59,225 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:18:59,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:18:59,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:18:59,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 69 conjunts are in the unsatisfiable core [2021-05-02 13:18:59,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:18:59,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:18:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 2788 proven. 4556 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-05-02 13:18:59,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962646002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:18:59,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:18:59,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70] total 72 [2021-05-02 13:18:59,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018983941] [2021-05-02 13:18:59,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 13:18:59,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:18:59,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 13:18:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 13:18:59,668 INFO L87 Difference]: Start difference. First operand 188 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 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 13:19:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:03,429 INFO L93 Difference]: Finished difference Result 238 states and 281 transitions. [2021-05-02 13:19:03,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 13:19:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 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 187 [2021-05-02 13:19:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:03,430 INFO L225 Difference]: With dead ends: 238 [2021-05-02 13:19:03,431 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 13:19:03,432 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2543 ImplicationChecksByTransitivity, 5291.2ms TimeCoverageRelationStatistics Valid=7316, Invalid=12144, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 13:19:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 13:19:03,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2021-05-02 13:19:03,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.1189189189189188) internal successors, (207), 185 states have internal predecessors, (207), 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 13:19:03,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 211 transitions. [2021-05-02 13:19:03,440 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 211 transitions. Word has length 187 [2021-05-02 13:19:03,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:03,440 INFO L480 AbstractCegarLoop]: Abstraction has 190 states and 211 transitions. [2021-05-02 13:19:03,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0694444444444446) internal successors, (149), 71 states have internal predecessors, (149), 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 13:19:03,440 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 211 transitions. [2021-05-02 13:19:03,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-05-02 13:19:03,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:03,441 INFO L523 BasicCegarLoop]: trace histogram [89, 68, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:03,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-05-02 13:19:03,657 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:03,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:03,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1848481070, now seen corresponding path program 65 times [2021-05-02 13:19:03,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:03,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348179687] [2021-05-02 13:19:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:05,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2829 proven. 4692 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-05-02 13:19:05,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:05,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348179687] [2021-05-02 13:19:05,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348179687] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:05,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427387885] [2021-05-02 13:19:05,696 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:05,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2021-05-02 13:19:05,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:05,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-02 13:19:05,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:05,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:05,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 2829 proven. 4692 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-05-02 13:19:06,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427387885] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:06,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:06,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71] total 73 [2021-05-02 13:19:06,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135314804] [2021-05-02 13:19:06,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 13:19:06,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:06,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 13:19:06,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 13:19:06,168 INFO L87 Difference]: Start difference. First operand 190 states and 211 transitions. Second operand has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 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 13:19:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:10,052 INFO L93 Difference]: Finished difference Result 240 states and 283 transitions. [2021-05-02 13:19:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 13:19:10,052 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 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 189 [2021-05-02 13:19:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:10,053 INFO L225 Difference]: With dead ends: 240 [2021-05-02 13:19:10,053 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 13:19:10,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 5483.6ms TimeCoverageRelationStatistics Valid=7527, Invalid=12495, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 13:19:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 13:19:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-05-02 13:19:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.1176470588235294) internal successors, (209), 187 states have internal predecessors, (209), 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 13:19:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 213 transitions. [2021-05-02 13:19:10,059 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 213 transitions. Word has length 189 [2021-05-02 13:19:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:10,059 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 213 transitions. [2021-05-02 13:19:10,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 72 states have internal predecessors, (151), 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 13:19:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 213 transitions. [2021-05-02 13:19:10,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-05-02 13:19:10,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:10,060 INFO L523 BasicCegarLoop]: trace histogram [90, 69, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:10,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-02 13:19:10,261 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:10,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:10,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1732690763, now seen corresponding path program 66 times [2021-05-02 13:19:10,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:10,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252324837] [2021-05-02 13:19:10,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:12,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 2870 proven. 4830 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-05-02 13:19:12,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:12,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252324837] [2021-05-02 13:19:12,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252324837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:12,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819579084] [2021-05-02 13:19:12,560 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:12,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2021-05-02 13:19:12,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:12,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 13:19:12,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:12,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:12,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:13,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 2967 proven. 441 refuted. 0 times theorem prover too weak. 4692 trivial. 0 not checked. [2021-05-02 13:19:14,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819579084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:14,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:14,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 24] total 95 [2021-05-02 13:19:14,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761942768] [2021-05-02 13:19:14,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 13:19:14,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:14,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 13:19:14,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 13:19:14,472 INFO L87 Difference]: Start difference. First operand 192 states and 213 transitions. Second operand has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 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 13:19:20,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:20,789 INFO L93 Difference]: Finished difference Result 245 states and 291 transitions. [2021-05-02 13:19:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 13:19:20,790 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 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 191 [2021-05-02 13:19:20,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:20,790 INFO L225 Difference]: With dead ends: 245 [2021-05-02 13:19:20,791 INFO L226 Difference]: Without dead ends: 197 [2021-05-02 13:19:20,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4255 ImplicationChecksByTransitivity, 9559.9ms TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2021-05-02 13:19:20,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-05-02 13:19:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2021-05-02 13:19:20,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.1204188481675392) internal successors, (214), 191 states have internal predecessors, (214), 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 13:19:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 218 transitions. [2021-05-02 13:19:20,799 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 218 transitions. Word has length 191 [2021-05-02 13:19:20,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:20,799 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 218 transitions. [2021-05-02 13:19:20,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 94 states have internal predecessors, (197), 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 13:19:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 218 transitions. [2021-05-02 13:19:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-05-02 13:19:20,800 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:20,800 INFO L523 BasicCegarLoop]: trace histogram [92, 70, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:21,001 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:21,001 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:21,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:21,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1087175043, now seen corresponding path program 67 times [2021-05-02 13:19:21,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:21,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231815691] [2021-05-02 13:19:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:23,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3053 proven. 4970 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 13:19:23,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:23,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231815691] [2021-05-02 13:19:23,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231815691] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:23,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643372363] [2021-05-02 13:19:23,369 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:23,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 13:19:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:23,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:23,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 3053 proven. 4970 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 13:19:23,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643372363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:23,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:23,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73] total 75 [2021-05-02 13:19:23,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469764534] [2021-05-02 13:19:23,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 13:19:23,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:23,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 13:19:23,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 13:19:23,834 INFO L87 Difference]: Start difference. First operand 196 states and 218 transitions. Second operand has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 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 13:19:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:28,420 INFO L93 Difference]: Finished difference Result 248 states and 293 transitions. [2021-05-02 13:19:28,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 13:19:28,420 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 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 195 [2021-05-02 13:19:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:28,421 INFO L225 Difference]: With dead ends: 248 [2021-05-02 13:19:28,421 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 13:19:28,422 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 6463.2ms TimeCoverageRelationStatistics Valid=7958, Invalid=13212, Unknown=0, NotChecked=0, Total=21170 [2021-05-02 13:19:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 13:19:28,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2021-05-02 13:19:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.1191709844559585) internal successors, (216), 193 states have internal predecessors, (216), 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 13:19:28,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2021-05-02 13:19:28,430 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 195 [2021-05-02 13:19:28,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:28,430 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2021-05-02 13:19:28,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.066666666666667) internal successors, (155), 74 states have internal predecessors, (155), 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 13:19:28,430 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2021-05-02 13:19:28,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-05-02 13:19:28,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:28,431 INFO L523 BasicCegarLoop]: trace histogram [93, 71, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:28,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:28,653 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:28,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:28,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1612685856, now seen corresponding path program 68 times [2021-05-02 13:19:28,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:28,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611278865] [2021-05-02 13:19:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:30,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3096 proven. 5112 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 13:19:30,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:30,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611278865] [2021-05-02 13:19:30,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611278865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:30,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683620415] [2021-05-02 13:19:30,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:30,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:19:30,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:30,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 73 conjunts are in the unsatisfiable core [2021-05-02 13:19:30,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:30,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:30,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 3096 proven. 5112 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 13:19:31,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683620415] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:31,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:31,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74] total 76 [2021-05-02 13:19:31,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998752026] [2021-05-02 13:19:31,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 13:19:31,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 13:19:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 13:19:31,256 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 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 13:19:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:35,348 INFO L93 Difference]: Finished difference Result 250 states and 295 transitions. [2021-05-02 13:19:35,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 13:19:35,348 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 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 197 [2021-05-02 13:19:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:35,349 INFO L225 Difference]: With dead ends: 250 [2021-05-02 13:19:35,349 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 13:19:35,350 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 5893.5ms TimeCoverageRelationStatistics Valid=8178, Invalid=13578, Unknown=0, NotChecked=0, Total=21756 [2021-05-02 13:19:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 13:19:35,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-05-02 13:19:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.117948717948718) internal successors, (218), 195 states have internal predecessors, (218), 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 13:19:35,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 222 transitions. [2021-05-02 13:19:35,358 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 222 transitions. Word has length 197 [2021-05-02 13:19:35,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:35,358 INFO L480 AbstractCegarLoop]: Abstraction has 200 states and 222 transitions. [2021-05-02 13:19:35,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 75 states have internal predecessors, (157), 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 13:19:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 222 transitions. [2021-05-02 13:19:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-05-02 13:19:35,359 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:35,359 INFO L523 BasicCegarLoop]: trace histogram [94, 72, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:35,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:35,573 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:35,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2018763011, now seen corresponding path program 69 times [2021-05-02 13:19:35,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:35,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425213853] [2021-05-02 13:19:35,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:35,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:37,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 3139 proven. 5256 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-05-02 13:19:37,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:37,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425213853] [2021-05-02 13:19:37,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425213853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:37,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623443] [2021-05-02 13:19:37,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:37,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-05-02 13:19:37,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:37,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:19:37,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:38,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:38,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:39,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 3240 proven. 484 refuted. 0 times theorem prover too weak. 5112 trivial. 0 not checked. [2021-05-02 13:19:39,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:39,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:39,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 25] total 99 [2021-05-02 13:19:39,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636882881] [2021-05-02 13:19:39,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 13:19:39,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:39,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 13:19:39,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 13:19:39,783 INFO L87 Difference]: Start difference. First operand 200 states and 222 transitions. Second operand has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 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 13:19:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:46,967 INFO L93 Difference]: Finished difference Result 255 states and 303 transitions. [2021-05-02 13:19:46,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 13:19:46,968 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 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 199 [2021-05-02 13:19:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:46,968 INFO L225 Difference]: With dead ends: 255 [2021-05-02 13:19:46,968 INFO L226 Difference]: Without dead ends: 205 [2021-05-02 13:19:46,970 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 10407.5ms TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2021-05-02 13:19:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-02 13:19:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2021-05-02 13:19:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.120603015075377) internal successors, (223), 199 states have internal predecessors, (223), 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 13:19:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 227 transitions. [2021-05-02 13:19:46,978 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 227 transitions. Word has length 199 [2021-05-02 13:19:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:46,978 INFO L480 AbstractCegarLoop]: Abstraction has 204 states and 227 transitions. [2021-05-02 13:19:46,978 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 98 states have internal predecessors, (205), 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 13:19:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 227 transitions. [2021-05-02 13:19:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2021-05-02 13:19:46,979 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:46,979 INFO L523 BasicCegarLoop]: trace histogram [96, 73, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:47,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-05-02 13:19:47,201 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:47,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:47,201 INFO L82 PathProgramCache]: Analyzing trace with hash 981156789, now seen corresponding path program 70 times [2021-05-02 13:19:47,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:47,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426210283] [2021-05-02 13:19:47,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:49,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:49,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3330 proven. 5402 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 13:19:49,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:49,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426210283] [2021-05-02 13:19:49,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426210283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:49,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368891256] [2021-05-02 13:19:49,653 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:49,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:19:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 75 conjunts are in the unsatisfiable core [2021-05-02 13:19:49,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:49,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:49,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 3330 proven. 5402 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 13:19:50,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368891256] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:50,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:50,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76] total 78 [2021-05-02 13:19:50,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314514183] [2021-05-02 13:19:50,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 13:19:50,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 13:19:50,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 13:19:50,092 INFO L87 Difference]: Start difference. First operand 204 states and 227 transitions. Second operand has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 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 13:19:54,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:19:54,686 INFO L93 Difference]: Finished difference Result 258 states and 305 transitions. [2021-05-02 13:19:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 13:19:54,687 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 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 203 [2021-05-02 13:19:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:19:54,688 INFO L225 Difference]: With dead ends: 258 [2021-05-02 13:19:54,688 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 13:19:54,689 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2990 ImplicationChecksByTransitivity, 6579.2ms TimeCoverageRelationStatistics Valid=8627, Invalid=14325, Unknown=0, NotChecked=0, Total=22952 [2021-05-02 13:19:54,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 13:19:54,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2021-05-02 13:19:54,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.1194029850746268) internal successors, (225), 201 states have internal predecessors, (225), 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 13:19:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 229 transitions. [2021-05-02 13:19:54,694 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 229 transitions. Word has length 203 [2021-05-02 13:19:54,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:19:54,694 INFO L480 AbstractCegarLoop]: Abstraction has 206 states and 229 transitions. [2021-05-02 13:19:54,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 77 states have internal predecessors, (161), 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 13:19:54,694 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 229 transitions. [2021-05-02 13:19:54,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-05-02 13:19:54,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:19:54,695 INFO L523 BasicCegarLoop]: trace histogram [97, 74, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:19:54,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:54,897 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:19:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:19:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1858534162, now seen corresponding path program 71 times [2021-05-02 13:19:54,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:19:54,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392996867] [2021-05-02 13:19:54,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:19:54,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:57,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:19:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:19:57,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3375 proven. 5550 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 13:19:57,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:19:57,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392996867] [2021-05-02 13:19:57,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392996867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:57,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190855168] [2021-05-02 13:19:57,394 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:19:57,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 98 check-sat command(s) [2021-05-02 13:19:57,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:19:57,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 76 conjunts are in the unsatisfiable core [2021-05-02 13:19:57,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:19:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:19:57,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 3375 proven. 5550 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 13:19:57,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190855168] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:19:57,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:19:57,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 77] total 79 [2021-05-02 13:19:57,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273980720] [2021-05-02 13:19:57,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 13:19:57,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:19:57,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 13:19:57,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 13:19:57,935 INFO L87 Difference]: Start difference. First operand 206 states and 229 transitions. Second operand has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 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 13:20:03,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:03,406 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2021-05-02 13:20:03,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 13:20:03,407 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 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 205 [2021-05-02 13:20:03,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:03,408 INFO L225 Difference]: With dead ends: 260 [2021-05-02 13:20:03,408 INFO L226 Difference]: Without dead ends: 208 [2021-05-02 13:20:03,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 7434.8ms TimeCoverageRelationStatistics Valid=8856, Invalid=14706, Unknown=0, NotChecked=0, Total=23562 [2021-05-02 13:20:03,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-02 13:20:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-05-02 13:20:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.1182266009852218) internal successors, (227), 203 states have internal predecessors, (227), 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 13:20:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 231 transitions. [2021-05-02 13:20:03,415 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 231 transitions. Word has length 205 [2021-05-02 13:20:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:03,415 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 231 transitions. [2021-05-02 13:20:03,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 78 states have internal predecessors, (163), 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 13:20:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 231 transitions. [2021-05-02 13:20:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-05-02 13:20:03,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:03,416 INFO L523 BasicCegarLoop]: trace histogram [98, 75, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:03,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:03,644 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:03,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:03,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1090367697, now seen corresponding path program 72 times [2021-05-02 13:20:03,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:03,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983769411] [2021-05-02 13:20:03,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:06,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 3420 proven. 5700 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-05-02 13:20:06,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:06,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983769411] [2021-05-02 13:20:06,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983769411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:06,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578897491] [2021-05-02 13:20:06,758 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:06,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-05-02 13:20:06,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:06,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:20:06,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:07,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:07,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:08,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 3525 proven. 529 refuted. 0 times theorem prover too weak. 5550 trivial. 0 not checked. [2021-05-02 13:20:09,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578897491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:09,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:09,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 26] total 103 [2021-05-02 13:20:09,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635289339] [2021-05-02 13:20:09,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 13:20:09,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:09,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 13:20:09,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 13:20:09,628 INFO L87 Difference]: Start difference. First operand 208 states and 231 transitions. Second operand has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 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 13:20:17,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:17,588 INFO L93 Difference]: Finished difference Result 265 states and 315 transitions. [2021-05-02 13:20:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 13:20:17,589 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 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 207 [2021-05-02 13:20:17,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:17,590 INFO L225 Difference]: With dead ends: 265 [2021-05-02 13:20:17,590 INFO L226 Difference]: Without dead ends: 213 [2021-05-02 13:20:17,591 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5025 ImplicationChecksByTransitivity, 12564.5ms TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2021-05-02 13:20:17,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-05-02 13:20:17,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2021-05-02 13:20:17,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.1207729468599035) internal successors, (232), 207 states have internal predecessors, (232), 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 13:20:17,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2021-05-02 13:20:17,598 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 207 [2021-05-02 13:20:17,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:17,598 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2021-05-02 13:20:17,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0679611650485437) internal successors, (213), 102 states have internal predecessors, (213), 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 13:20:17,598 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2021-05-02 13:20:17,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-05-02 13:20:17,599 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:17,599 INFO L523 BasicCegarLoop]: trace histogram [100, 76, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:17,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:17,813 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:17,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1519107481, now seen corresponding path program 73 times [2021-05-02 13:20:17,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:17,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097315868] [2021-05-02 13:20:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:20,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:20,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:20,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3619 proven. 5852 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-05-02 13:20:20,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:20,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097315868] [2021-05-02 13:20:20,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097315868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:20,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36747511] [2021-05-02 13:20:20,572 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:20,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 78 conjunts are in the unsatisfiable core [2021-05-02 13:20:20,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:20,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:20,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 3619 proven. 5852 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-05-02 13:20:21,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36747511] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:21,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:21,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 79] total 81 [2021-05-02 13:20:21,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754658490] [2021-05-02 13:20:21,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 13:20:21,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:21,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 13:20:21,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 13:20:21,082 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 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 13:20:26,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:26,081 INFO L93 Difference]: Finished difference Result 268 states and 317 transitions. [2021-05-02 13:20:26,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 13:20:26,081 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 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 211 [2021-05-02 13:20:26,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:26,082 INFO L225 Difference]: With dead ends: 268 [2021-05-02 13:20:26,082 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 13:20:26,083 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3227 ImplicationChecksByTransitivity, 7190.8ms TimeCoverageRelationStatistics Valid=9323, Invalid=15483, Unknown=0, NotChecked=0, Total=24806 [2021-05-02 13:20:26,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 13:20:26,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-05-02 13:20:26,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.1196172248803828) internal successors, (234), 209 states have internal predecessors, (234), 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 13:20:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 238 transitions. [2021-05-02 13:20:26,092 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 238 transitions. Word has length 211 [2021-05-02 13:20:26,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:26,092 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 238 transitions. [2021-05-02 13:20:26,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0617283950617282) internal successors, (167), 80 states have internal predecessors, (167), 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 13:20:26,092 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 238 transitions. [2021-05-02 13:20:26,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-05-02 13:20:26,093 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:26,093 INFO L523 BasicCegarLoop]: trace histogram [101, 77, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:26,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-02 13:20:26,315 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:26,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:26,315 INFO L82 PathProgramCache]: Analyzing trace with hash 653610180, now seen corresponding path program 74 times [2021-05-02 13:20:26,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:26,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143585675] [2021-05-02 13:20:26,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:29,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3666 proven. 6006 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-05-02 13:20:29,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:29,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143585675] [2021-05-02 13:20:29,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143585675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:29,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748191974] [2021-05-02 13:20:29,209 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:29,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:20:29,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:29,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 79 conjunts are in the unsatisfiable core [2021-05-02 13:20:29,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:29,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 3666 proven. 6006 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-05-02 13:20:29,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748191974] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:29,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:29,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80] total 82 [2021-05-02 13:20:29,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104465950] [2021-05-02 13:20:29,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 13:20:29,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:29,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 13:20:29,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 13:20:29,847 INFO L87 Difference]: Start difference. First operand 214 states and 238 transitions. Second operand has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 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 13:20:35,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:35,374 INFO L93 Difference]: Finished difference Result 270 states and 319 transitions. [2021-05-02 13:20:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 13:20:35,375 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 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 213 [2021-05-02 13:20:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:35,375 INFO L225 Difference]: With dead ends: 270 [2021-05-02 13:20:35,375 INFO L226 Difference]: Without dead ends: 216 [2021-05-02 13:20:35,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 8033.2ms TimeCoverageRelationStatistics Valid=9561, Invalid=15879, Unknown=0, NotChecked=0, Total=25440 [2021-05-02 13:20:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-02 13:20:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-05-02 13:20:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.1184834123222749) internal successors, (236), 211 states have internal predecessors, (236), 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 13:20:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 240 transitions. [2021-05-02 13:20:35,385 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 240 transitions. Word has length 213 [2021-05-02 13:20:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:35,385 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 240 transitions. [2021-05-02 13:20:35,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 81 states have internal predecessors, (169), 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 13:20:35,385 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 240 transitions. [2021-05-02 13:20:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-05-02 13:20:35,386 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:35,386 INFO L523 BasicCegarLoop]: trace histogram [102, 78, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:35,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:35,601 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:35,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:35,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1281176545, now seen corresponding path program 75 times [2021-05-02 13:20:35,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:35,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739991478] [2021-05-02 13:20:35,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:38,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 3713 proven. 6162 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-05-02 13:20:38,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:38,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739991478] [2021-05-02 13:20:38,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739991478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:38,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349276353] [2021-05-02 13:20:38,399 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:38,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2021-05-02 13:20:38,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:38,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 13:20:38,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:38,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:38,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:38,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:38,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:38,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:38,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:38,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:38,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:39,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 3822 proven. 576 refuted. 0 times theorem prover too weak. 6006 trivial. 0 not checked. [2021-05-02 13:20:40,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349276353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:40,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:40,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 27] total 107 [2021-05-02 13:20:40,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905633809] [2021-05-02 13:20:40,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 13:20:40,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:40,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 13:20:40,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 13:20:40,913 INFO L87 Difference]: Start difference. First operand 216 states and 240 transitions. Second operand has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 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 13:20:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:49,312 INFO L93 Difference]: Finished difference Result 275 states and 327 transitions. [2021-05-02 13:20:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-02 13:20:49,312 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 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 215 [2021-05-02 13:20:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:49,313 INFO L225 Difference]: With dead ends: 275 [2021-05-02 13:20:49,313 INFO L226 Difference]: Without dead ends: 221 [2021-05-02 13:20:49,315 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5434 ImplicationChecksByTransitivity, 12493.2ms TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2021-05-02 13:20:49,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-05-02 13:20:49,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2021-05-02 13:20:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1209302325581396) internal successors, (241), 215 states have internal predecessors, (241), 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 13:20:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 245 transitions. [2021-05-02 13:20:49,321 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 245 transitions. Word has length 215 [2021-05-02 13:20:49,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:49,321 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 245 transitions. [2021-05-02 13:20:49,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 106 states have internal predecessors, (221), 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 13:20:49,321 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 245 transitions. [2021-05-02 13:20:49,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-05-02 13:20:49,322 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:49,322 INFO L523 BasicCegarLoop]: trace histogram [104, 79, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:49,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:49,523 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:49,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1101802087, now seen corresponding path program 76 times [2021-05-02 13:20:49,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:49,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42561052] [2021-05-02 13:20:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:53,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:20:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:20:53,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3920 proven. 6320 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-05-02 13:20:53,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:20:53,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42561052] [2021-05-02 13:20:53,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42561052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:53,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434027683] [2021-05-02 13:20:53,225 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:20:53,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:20:53,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:20:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 81 conjunts are in the unsatisfiable core [2021-05-02 13:20:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:20:53,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:20:53,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 3920 proven. 6320 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-05-02 13:20:53,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434027683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:20:53,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:20:53,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 82] total 84 [2021-05-02 13:20:53,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987367286] [2021-05-02 13:20:53,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 13:20:53,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:20:53,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 13:20:53,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 13:20:53,749 INFO L87 Difference]: Start difference. First operand 220 states and 245 transitions. Second operand has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 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 13:20:58,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:20:58,891 INFO L93 Difference]: Finished difference Result 278 states and 329 transitions. [2021-05-02 13:20:58,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 13:20:58,892 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 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 219 [2021-05-02 13:20:58,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:20:58,892 INFO L225 Difference]: With dead ends: 278 [2021-05-02 13:20:58,892 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 13:20:58,893 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3473 ImplicationChecksByTransitivity, 8460.8ms TimeCoverageRelationStatistics Valid=10046, Invalid=16686, Unknown=0, NotChecked=0, Total=26732 [2021-05-02 13:20:58,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 13:20:58,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-05-02 13:20:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.119815668202765) internal successors, (243), 217 states have internal predecessors, (243), 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 13:20:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 247 transitions. [2021-05-02 13:20:58,899 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 247 transitions. Word has length 219 [2021-05-02 13:20:58,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:20:58,899 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 247 transitions. [2021-05-02 13:20:58,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 83 states have internal predecessors, (173), 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 13:20:58,899 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 247 transitions. [2021-05-02 13:20:58,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-05-02 13:20:58,900 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:20:58,900 INFO L523 BasicCegarLoop]: trace histogram [105, 80, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:20:59,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-02 13:20:59,123 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:20:59,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:20:59,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1207487754, now seen corresponding path program 77 times [2021-05-02 13:20:59,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:20:59,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635019544] [2021-05-02 13:20:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:20:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:02,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 3969 proven. 6480 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-05-02 13:21:02,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:02,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635019544] [2021-05-02 13:21:02,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635019544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:02,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790893752] [2021-05-02 13:21:02,406 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:02,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 106 check-sat command(s) [2021-05-02 13:21:02,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:21:02,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 82 conjunts are in the unsatisfiable core [2021-05-02 13:21:02,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:02,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 3969 proven. 6480 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-05-02 13:21:02,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790893752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:02,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:02,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 83] total 85 [2021-05-02 13:21:02,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965485625] [2021-05-02 13:21:02,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 13:21:02,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 13:21:02,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 13:21:02,986 INFO L87 Difference]: Start difference. First operand 222 states and 247 transitions. Second operand has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 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 13:21:08,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:08,549 INFO L93 Difference]: Finished difference Result 280 states and 331 transitions. [2021-05-02 13:21:08,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 13:21:08,550 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 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 221 [2021-05-02 13:21:08,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:08,551 INFO L225 Difference]: With dead ends: 280 [2021-05-02 13:21:08,551 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 13:21:08,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3557 ImplicationChecksByTransitivity, 8456.8ms TimeCoverageRelationStatistics Valid=10293, Invalid=17097, Unknown=0, NotChecked=0, Total=27390 [2021-05-02 13:21:08,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 13:21:08,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-05-02 13:21:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.1187214611872147) internal successors, (245), 219 states have internal predecessors, (245), 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 13:21:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 249 transitions. [2021-05-02 13:21:08,558 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 249 transitions. Word has length 221 [2021-05-02 13:21:08,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:08,558 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 249 transitions. [2021-05-02 13:21:08,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0588235294117645) internal successors, (175), 84 states have internal predecessors, (175), 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 13:21:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 249 transitions. [2021-05-02 13:21:08,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-05-02 13:21:08,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:08,559 INFO L523 BasicCegarLoop]: trace histogram [106, 81, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:08,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:08,769 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:08,769 INFO L82 PathProgramCache]: Analyzing trace with hash 307801363, now seen corresponding path program 78 times [2021-05-02 13:21:08,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:08,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879732064] [2021-05-02 13:21:08,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:12,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 4018 proven. 6642 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-05-02 13:21:12,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:12,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879732064] [2021-05-02 13:21:12,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879732064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:12,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351812118] [2021-05-02 13:21:12,090 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:12,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2021-05-02 13:21:12,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:21:12,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 13:21:12,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:12,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:12,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:13,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:14,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 4131 proven. 625 refuted. 0 times theorem prover too weak. 6480 trivial. 0 not checked. [2021-05-02 13:21:15,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351812118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:15,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:15,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 28] total 111 [2021-05-02 13:21:15,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479021971] [2021-05-02 13:21:15,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 13:21:15,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:15,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 13:21:15,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 13:21:15,098 INFO L87 Difference]: Start difference. First operand 224 states and 249 transitions. Second operand has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 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 13:21:24,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:24,611 INFO L93 Difference]: Finished difference Result 285 states and 339 transitions. [2021-05-02 13:21:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 13:21:24,612 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 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 223 [2021-05-02 13:21:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:24,612 INFO L225 Difference]: With dead ends: 285 [2021-05-02 13:21:24,613 INFO L226 Difference]: Without dead ends: 229 [2021-05-02 13:21:24,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5859 ImplicationChecksByTransitivity, 14507.1ms TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2021-05-02 13:21:24,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-02 13:21:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2021-05-02 13:21:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.1210762331838564) internal successors, (250), 223 states have internal predecessors, (250), 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 13:21:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 254 transitions. [2021-05-02 13:21:24,623 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 254 transitions. Word has length 223 [2021-05-02 13:21:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:24,623 INFO L480 AbstractCegarLoop]: Abstraction has 228 states and 254 transitions. [2021-05-02 13:21:24,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.063063063063063) internal successors, (229), 110 states have internal predecessors, (229), 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 13:21:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 254 transitions. [2021-05-02 13:21:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2021-05-02 13:21:24,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:24,624 INFO L523 BasicCegarLoop]: trace histogram [108, 82, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:24,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:24,848 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1556226741, now seen corresponding path program 79 times [2021-05-02 13:21:24,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:24,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159815007] [2021-05-02 13:21:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:28,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4233 proven. 6806 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-05-02 13:21:28,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:28,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159815007] [2021-05-02 13:21:28,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159815007] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:28,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605921550] [2021-05-02 13:21:28,650 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 84 conjunts are in the unsatisfiable core [2021-05-02 13:21:28,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:28,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:28,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 4233 proven. 6806 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-05-02 13:21:29,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605921550] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:29,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:29,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 85] total 87 [2021-05-02 13:21:29,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130055377] [2021-05-02 13:21:29,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 13:21:29,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:29,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 13:21:29,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 13:21:29,249 INFO L87 Difference]: Start difference. First operand 228 states and 254 transitions. Second operand has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 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 13:21:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:35,365 INFO L93 Difference]: Finished difference Result 288 states and 341 transitions. [2021-05-02 13:21:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 13:21:35,365 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 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 227 [2021-05-02 13:21:35,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:35,366 INFO L225 Difference]: With dead ends: 288 [2021-05-02 13:21:35,366 INFO L226 Difference]: Without dead ends: 230 [2021-05-02 13:21:35,367 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3728 ImplicationChecksByTransitivity, 9501.5ms TimeCoverageRelationStatistics Valid=10796, Invalid=17934, Unknown=0, NotChecked=0, Total=28730 [2021-05-02 13:21:35,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-02 13:21:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2021-05-02 13:21:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.12) internal successors, (252), 225 states have internal predecessors, (252), 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 13:21:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 256 transitions. [2021-05-02 13:21:35,374 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 256 transitions. Word has length 227 [2021-05-02 13:21:35,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:35,375 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 256 transitions. [2021-05-02 13:21:35,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.057471264367816) internal successors, (179), 86 states have internal predecessors, (179), 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 13:21:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 256 transitions. [2021-05-02 13:21:35,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-05-02 13:21:35,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:35,376 INFO L523 BasicCegarLoop]: trace histogram [109, 83, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:35,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:35,589 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:35,589 INFO L82 PathProgramCache]: Analyzing trace with hash -215970392, now seen corresponding path program 80 times [2021-05-02 13:21:35,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:35,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386152009] [2021-05-02 13:21:35,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:39,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:39,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4284 proven. 6972 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-05-02 13:21:39,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:39,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386152009] [2021-05-02 13:21:39,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386152009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:39,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243881711] [2021-05-02 13:21:39,254 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:39,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:21:39,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:21:39,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 85 conjunts are in the unsatisfiable core [2021-05-02 13:21:39,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:39,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 4284 proven. 6972 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-05-02 13:21:39,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243881711] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:39,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:39,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86] total 88 [2021-05-02 13:21:39,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137581043] [2021-05-02 13:21:39,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 13:21:39,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:39,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 13:21:39,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 13:21:39,901 INFO L87 Difference]: Start difference. First operand 230 states and 256 transitions. Second operand has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 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 13:21:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:21:46,274 INFO L93 Difference]: Finished difference Result 290 states and 343 transitions. [2021-05-02 13:21:46,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 13:21:46,275 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 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 229 [2021-05-02 13:21:46,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:21:46,276 INFO L225 Difference]: With dead ends: 290 [2021-05-02 13:21:46,276 INFO L226 Difference]: Without dead ends: 232 [2021-05-02 13:21:46,277 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 9554.4ms TimeCoverageRelationStatistics Valid=11052, Invalid=18360, Unknown=0, NotChecked=0, Total=29412 [2021-05-02 13:21:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-02 13:21:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2021-05-02 13:21:46,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.118942731277533) internal successors, (254), 227 states have internal predecessors, (254), 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 13:21:46,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 258 transitions. [2021-05-02 13:21:46,283 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 258 transitions. Word has length 229 [2021-05-02 13:21:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:21:46,283 INFO L480 AbstractCegarLoop]: Abstraction has 232 states and 258 transitions. [2021-05-02 13:21:46,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0568181818181817) internal successors, (181), 87 states have internal predecessors, (181), 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 13:21:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 258 transitions. [2021-05-02 13:21:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-05-02 13:21:46,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:21:46,284 INFO L523 BasicCegarLoop]: trace histogram [110, 84, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:21:46,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:46,485 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:21:46,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:21:46,486 INFO L82 PathProgramCache]: Analyzing trace with hash -719807803, now seen corresponding path program 81 times [2021-05-02 13:21:46,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:21:46,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079523741] [2021-05-02 13:21:46,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:21:46,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:50,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:21:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:21:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 4335 proven. 7140 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2021-05-02 13:21:50,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:21:50,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079523741] [2021-05-02 13:21:50,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079523741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:50,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638701123] [2021-05-02 13:21:50,080 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:21:50,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2021-05-02 13:21:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:21:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:21:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:21:50,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:50,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:51,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:52,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:53,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:53,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:53,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:53,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:21:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 4452 proven. 676 refuted. 0 times theorem prover too weak. 6972 trivial. 0 not checked. [2021-05-02 13:21:53,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638701123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:21:53,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:21:53,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 29] total 115 [2021-05-02 13:21:53,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050148032] [2021-05-02 13:21:53,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-02 13:21:53,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:21:53,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-02 13:21:53,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 13:21:53,366 INFO L87 Difference]: Start difference. First operand 232 states and 258 transitions. Second operand has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 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 13:22:04,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:04,193 INFO L93 Difference]: Finished difference Result 295 states and 351 transitions. [2021-05-02 13:22:04,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 13:22:04,194 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 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 231 [2021-05-02 13:22:04,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:04,195 INFO L225 Difference]: With dead ends: 295 [2021-05-02 13:22:04,195 INFO L226 Difference]: Without dead ends: 237 [2021-05-02 13:22:04,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6300 ImplicationChecksByTransitivity, 16290.9ms TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2021-05-02 13:22:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-02 13:22:04,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2021-05-02 13:22:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.121212121212121) internal successors, (259), 231 states have internal predecessors, (259), 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 13:22:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 263 transitions. [2021-05-02 13:22:04,203 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 263 transitions. Word has length 231 [2021-05-02 13:22:04,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:04,204 INFO L480 AbstractCegarLoop]: Abstraction has 236 states and 263 transitions. [2021-05-02 13:22:04,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.0608695652173914) internal successors, (237), 114 states have internal predecessors, (237), 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 13:22:04,204 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 263 transitions. [2021-05-02 13:22:04,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-05-02 13:22:04,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:04,205 INFO L523 BasicCegarLoop]: trace histogram [112, 85, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:04,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:04,405 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:04,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:04,406 INFO L82 PathProgramCache]: Analyzing trace with hash 299776381, now seen corresponding path program 82 times [2021-05-02 13:22:04,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:04,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673397250] [2021-05-02 13:22:04,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:08,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 4558 proven. 7310 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-05-02 13:22:08,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:08,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673397250] [2021-05-02 13:22:08,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673397250] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:08,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147954858] [2021-05-02 13:22:08,318 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:08,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:22:08,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:22:08,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 87 conjunts are in the unsatisfiable core [2021-05-02 13:22:08,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:08,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:08,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 4558 proven. 7310 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-05-02 13:22:09,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147954858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:09,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:09,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88] total 90 [2021-05-02 13:22:09,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015170987] [2021-05-02 13:22:09,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 13:22:09,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:09,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 13:22:09,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 13:22:09,005 INFO L87 Difference]: Start difference. First operand 236 states and 263 transitions. Second operand has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 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 13:22:16,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:16,041 INFO L93 Difference]: Finished difference Result 298 states and 353 transitions. [2021-05-02 13:22:16,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 13:22:16,042 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 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 235 [2021-05-02 13:22:16,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:16,043 INFO L225 Difference]: With dead ends: 298 [2021-05-02 13:22:16,043 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 13:22:16,044 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3992 ImplicationChecksByTransitivity, 10416.1ms TimeCoverageRelationStatistics Valid=11573, Invalid=19227, Unknown=0, NotChecked=0, Total=30800 [2021-05-02 13:22:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 13:22:16,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2021-05-02 13:22:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.1201716738197425) internal successors, (261), 233 states have internal predecessors, (261), 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 13:22:16,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 265 transitions. [2021-05-02 13:22:16,051 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 265 transitions. Word has length 235 [2021-05-02 13:22:16,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:16,052 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 265 transitions. [2021-05-02 13:22:16,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0555555555555554) internal successors, (185), 89 states have internal predecessors, (185), 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 13:22:16,052 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 265 transitions. [2021-05-02 13:22:16,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-05-02 13:22:16,053 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:16,053 INFO L523 BasicCegarLoop]: trace histogram [113, 86, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:16,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:16,277 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1223507162, now seen corresponding path program 83 times [2021-05-02 13:22:16,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:16,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410700822] [2021-05-02 13:22:16,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:20,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 4611 proven. 7482 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-05-02 13:22:20,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410700822] [2021-05-02 13:22:20,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410700822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978446758] [2021-05-02 13:22:20,463 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:20,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2021-05-02 13:22:20,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:22:20,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 88 conjunts are in the unsatisfiable core [2021-05-02 13:22:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:20,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:20,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 4611 proven. 7482 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-05-02 13:22:21,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978446758] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:21,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:21,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 89] total 91 [2021-05-02 13:22:21,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818323006] [2021-05-02 13:22:21,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 13:22:21,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 13:22:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 13:22:21,180 INFO L87 Difference]: Start difference. First operand 238 states and 265 transitions. Second operand has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 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 13:22:28,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:28,406 INFO L93 Difference]: Finished difference Result 300 states and 355 transitions. [2021-05-02 13:22:28,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 13:22:28,407 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 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 237 [2021-05-02 13:22:28,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:28,408 INFO L225 Difference]: With dead ends: 300 [2021-05-02 13:22:28,408 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 13:22:28,409 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4082 ImplicationChecksByTransitivity, 10856.0ms TimeCoverageRelationStatistics Valid=11838, Invalid=19668, Unknown=0, NotChecked=0, Total=31506 [2021-05-02 13:22:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 13:22:28,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2021-05-02 13:22:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.1191489361702127) internal successors, (263), 235 states have internal predecessors, (263), 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 13:22:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2021-05-02 13:22:28,415 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 237 [2021-05-02 13:22:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:28,415 INFO L480 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2021-05-02 13:22:28,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.0549450549450547) internal successors, (187), 90 states have internal predecessors, (187), 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 13:22:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2021-05-02 13:22:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-05-02 13:22:28,416 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:28,416 INFO L523 BasicCegarLoop]: trace histogram [114, 87, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:28,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-05-02 13:22:28,621 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:28,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:28,621 INFO L82 PathProgramCache]: Analyzing trace with hash -129442569, now seen corresponding path program 84 times [2021-05-02 13:22:28,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:28,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048523295] [2021-05-02 13:22:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:32,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 4664 proven. 7656 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-05-02 13:22:32,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048523295] [2021-05-02 13:22:32,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048523295] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:32,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387841762] [2021-05-02 13:22:32,681 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:32,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 111 check-sat command(s) [2021-05-02 13:22:32,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:22:32,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 13:22:32,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:33,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:33,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:34,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:35,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:36,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:36,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:36,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:36,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 4785 proven. 729 refuted. 0 times theorem prover too weak. 7482 trivial. 0 not checked. [2021-05-02 13:22:36,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387841762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:36,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:36,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 30] total 119 [2021-05-02 13:22:36,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442868527] [2021-05-02 13:22:36,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-02 13:22:36,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:36,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-02 13:22:36,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 13:22:36,376 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand has 119 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 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 13:22:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:22:48,631 INFO L93 Difference]: Finished difference Result 305 states and 363 transitions. [2021-05-02 13:22:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-02 13:22:48,632 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 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 239 [2021-05-02 13:22:48,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:22:48,633 INFO L225 Difference]: With dead ends: 305 [2021-05-02 13:22:48,633 INFO L226 Difference]: Without dead ends: 245 [2021-05-02 13:22:48,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6757 ImplicationChecksByTransitivity, 18376.4ms TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2021-05-02 13:22:48,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-02 13:22:48,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2021-05-02 13:22:48,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.1213389121338913) internal successors, (268), 239 states have internal predecessors, (268), 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 13:22:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 272 transitions. [2021-05-02 13:22:48,642 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 272 transitions. Word has length 239 [2021-05-02 13:22:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:22:48,643 INFO L480 AbstractCegarLoop]: Abstraction has 244 states and 272 transitions. [2021-05-02 13:22:48,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.0588235294117645) internal successors, (245), 118 states have internal predecessors, (245), 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 13:22:48,643 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 272 transitions. [2021-05-02 13:22:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-05-02 13:22:48,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:22:48,644 INFO L523 BasicCegarLoop]: trace histogram [116, 88, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:22:48,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:48,849 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:22:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:22:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1519859153, now seen corresponding path program 85 times [2021-05-02 13:22:48,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:22:48,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867851726] [2021-05-02 13:22:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:22:48,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:53,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:22:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:53,220 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 4895 proven. 7832 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-05-02 13:22:53,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:22:53,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867851726] [2021-05-02 13:22:53,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867851726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:53,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386237964] [2021-05-02 13:22:53,221 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:22:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:22:53,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 90 conjunts are in the unsatisfiable core [2021-05-02 13:22:53,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:22:53,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:22:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 4895 proven. 7832 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-05-02 13:22:53,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386237964] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:22:53,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:22:53,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 91] total 93 [2021-05-02 13:22:53,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130140378] [2021-05-02 13:22:53,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 13:22:53,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:22:53,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 13:22:53,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 13:22:53,895 INFO L87 Difference]: Start difference. First operand 244 states and 272 transitions. Second operand has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 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 13:23:01,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:23:01,452 INFO L93 Difference]: Finished difference Result 308 states and 365 transitions. [2021-05-02 13:23:01,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 13:23:01,453 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 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 243 [2021-05-02 13:23:01,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:23:01,453 INFO L225 Difference]: With dead ends: 308 [2021-05-02 13:23:01,454 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 13:23:01,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4265 ImplicationChecksByTransitivity, 11429.2ms TimeCoverageRelationStatistics Valid=12377, Invalid=20565, Unknown=0, NotChecked=0, Total=32942 [2021-05-02 13:23:01,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 13:23:01,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2021-05-02 13:23:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.120331950207469) internal successors, (270), 241 states have internal predecessors, (270), 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 13:23:01,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 274 transitions. [2021-05-02 13:23:01,464 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 274 transitions. Word has length 243 [2021-05-02 13:23:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:23:01,465 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 274 transitions. [2021-05-02 13:23:01,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.053763440860215) internal successors, (191), 92 states have internal predecessors, (191), 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 13:23:01,465 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 274 transitions. [2021-05-02 13:23:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-05-02 13:23:01,466 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:23:01,466 INFO L523 BasicCegarLoop]: trace histogram [117, 89, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:23:01,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-02 13:23:01,681 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:23:01,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:23:01,681 INFO L82 PathProgramCache]: Analyzing trace with hash 128000140, now seen corresponding path program 86 times [2021-05-02 13:23:01,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:23:01,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485252308] [2021-05-02 13:23:01,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:23:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:06,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:23:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 4950 proven. 8010 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-05-02 13:23:06,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:23:06,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485252308] [2021-05-02 13:23:06,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485252308] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:06,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454856236] [2021-05-02 13:23:06,038 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:23:06,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:23:06,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:23:06,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 91 conjunts are in the unsatisfiable core [2021-05-02 13:23:06,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:23:06,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 4950 proven. 8010 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-05-02 13:23:06,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454856236] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:06,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:23:06,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92] total 94 [2021-05-02 13:23:06,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806337477] [2021-05-02 13:23:06,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 13:23:06,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:23:06,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 13:23:06,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 13:23:06,771 INFO L87 Difference]: Start difference. First operand 246 states and 274 transitions. Second operand has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 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 13:23:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:23:14,696 INFO L93 Difference]: Finished difference Result 310 states and 367 transitions. [2021-05-02 13:23:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 13:23:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 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 245 [2021-05-02 13:23:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:23:14,698 INFO L225 Difference]: With dead ends: 310 [2021-05-02 13:23:14,698 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 13:23:14,699 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 11682.3ms TimeCoverageRelationStatistics Valid=12651, Invalid=21021, Unknown=0, NotChecked=0, Total=33672 [2021-05-02 13:23:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 13:23:14,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2021-05-02 13:23:14,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.1193415637860082) internal successors, (272), 243 states have internal predecessors, (272), 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 13:23:14,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 276 transitions. [2021-05-02 13:23:14,706 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 276 transitions. Word has length 245 [2021-05-02 13:23:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:23:14,706 INFO L480 AbstractCegarLoop]: Abstraction has 248 states and 276 transitions. [2021-05-02 13:23:14,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0531914893617023) internal successors, (193), 93 states have internal predecessors, (193), 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 13:23:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 276 transitions. [2021-05-02 13:23:14,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-05-02 13:23:14,707 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:23:14,707 INFO L523 BasicCegarLoop]: trace histogram [118, 90, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:23:14,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-02 13:23:14,909 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:23:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:23:14,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1122151511, now seen corresponding path program 87 times [2021-05-02 13:23:14,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:23:14,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518691065] [2021-05-02 13:23:14,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:23:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:19,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:23:19,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 5005 proven. 8190 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2021-05-02 13:23:19,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:23:19,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518691065] [2021-05-02 13:23:19,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518691065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:19,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916033002] [2021-05-02 13:23:19,374 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:23:19,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-05-02 13:23:19,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:23:19,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:23:19,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:23:19,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:19,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:19,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:19,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:20,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:21,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:22,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:23,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:23,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:23,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 5130 proven. 784 refuted. 0 times theorem prover too weak. 8010 trivial. 0 not checked. [2021-05-02 13:23:23,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916033002] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:23,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:23:23,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 31] total 123 [2021-05-02 13:23:23,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851405724] [2021-05-02 13:23:23,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-02 13:23:23,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:23:23,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-02 13:23:23,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 13:23:23,249 INFO L87 Difference]: Start difference. First operand 248 states and 276 transitions. Second operand has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 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 13:23:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:23:37,032 INFO L93 Difference]: Finished difference Result 315 states and 375 transitions. [2021-05-02 13:23:37,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-02 13:23:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 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 247 [2021-05-02 13:23:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:23:37,034 INFO L225 Difference]: With dead ends: 315 [2021-05-02 13:23:37,034 INFO L226 Difference]: Without dead ends: 253 [2021-05-02 13:23:37,036 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7230 ImplicationChecksByTransitivity, 20410.8ms TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2021-05-02 13:23:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-05-02 13:23:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2021-05-02 13:23:37,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.1214574898785425) internal successors, (277), 247 states have internal predecessors, (277), 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 13:23:37,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 281 transitions. [2021-05-02 13:23:37,042 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 281 transitions. Word has length 247 [2021-05-02 13:23:37,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:23:37,042 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 281 transitions. [2021-05-02 13:23:37,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.0569105691056913) internal successors, (253), 122 states have internal predecessors, (253), 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 13:23:37,042 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 281 transitions. [2021-05-02 13:23:37,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-05-02 13:23:37,043 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:23:37,043 INFO L523 BasicCegarLoop]: trace histogram [120, 91, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:23:37,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:23:37,245 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:23:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:23:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1801883807, now seen corresponding path program 88 times [2021-05-02 13:23:37,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:23:37,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393121099] [2021-05-02 13:23:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:23:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:42,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:23:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 5244 proven. 8372 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 13:23:42,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:23:42,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393121099] [2021-05-02 13:23:42,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393121099] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:42,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759130971] [2021-05-02 13:23:42,041 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:23:42,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:23:42,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:23:42,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 93 conjunts are in the unsatisfiable core [2021-05-02 13:23:42,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:23:42,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 5244 proven. 8372 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 13:23:42,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759130971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:42,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:23:42,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 94] total 96 [2021-05-02 13:23:42,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632800284] [2021-05-02 13:23:42,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 13:23:42,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:23:42,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 13:23:42,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 13:23:42,795 INFO L87 Difference]: Start difference. First operand 252 states and 281 transitions. Second operand has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 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 13:23:51,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:23:51,503 INFO L93 Difference]: Finished difference Result 318 states and 377 transitions. [2021-05-02 13:23:51,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 13:23:51,504 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 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 251 [2021-05-02 13:23:51,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:23:51,505 INFO L225 Difference]: With dead ends: 318 [2021-05-02 13:23:51,505 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 13:23:51,506 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4547 ImplicationChecksByTransitivity, 12885.9ms TimeCoverageRelationStatistics Valid=13208, Invalid=21948, Unknown=0, NotChecked=0, Total=35156 [2021-05-02 13:23:51,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 13:23:51,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-05-02 13:23:51,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.1204819277108433) internal successors, (279), 249 states have internal predecessors, (279), 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 13:23:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 283 transitions. [2021-05-02 13:23:51,512 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 283 transitions. Word has length 251 [2021-05-02 13:23:51,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:23:51,513 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 283 transitions. [2021-05-02 13:23:51,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0520833333333335) internal successors, (197), 95 states have internal predecessors, (197), 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 13:23:51,513 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 283 transitions. [2021-05-02 13:23:51,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2021-05-02 13:23:51,513 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:23:51,514 INFO L523 BasicCegarLoop]: trace histogram [121, 92, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:23:51,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:23:51,714 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:23:51,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:23:51,715 INFO L82 PathProgramCache]: Analyzing trace with hash 418912446, now seen corresponding path program 89 times [2021-05-02 13:23:51,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:23:51,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685430721] [2021-05-02 13:23:51,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:23:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:57,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:23:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:23:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 5301 proven. 8556 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 13:23:57,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:23:57,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685430721] [2021-05-02 13:23:57,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685430721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:57,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716407276] [2021-05-02 13:23:57,026 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:23:57,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 122 check-sat command(s) [2021-05-02 13:23:57,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:23:57,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 94 conjunts are in the unsatisfiable core [2021-05-02 13:23:57,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:23:57,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:23:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 5301 proven. 8556 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 13:23:57,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716407276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:23:57,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:23:57,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 95] total 97 [2021-05-02 13:23:57,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261064897] [2021-05-02 13:23:57,932 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 13:23:57,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:23:57,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 13:23:57,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 13:23:57,933 INFO L87 Difference]: Start difference. First operand 254 states and 283 transitions. Second operand has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 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 13:24:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:06,940 INFO L93 Difference]: Finished difference Result 320 states and 379 transitions. [2021-05-02 13:24:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 13:24:06,941 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 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 253 [2021-05-02 13:24:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:06,942 INFO L225 Difference]: With dead ends: 320 [2021-05-02 13:24:06,942 INFO L226 Difference]: Without dead ends: 256 [2021-05-02 13:24:06,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 13722.5ms TimeCoverageRelationStatistics Valid=13491, Invalid=22419, Unknown=0, NotChecked=0, Total=35910 [2021-05-02 13:24:06,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-02 13:24:06,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-05-02 13:24:06,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.1195219123505975) internal successors, (281), 251 states have internal predecessors, (281), 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 13:24:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 285 transitions. [2021-05-02 13:24:06,949 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 285 transitions. Word has length 253 [2021-05-02 13:24:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:06,950 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 285 transitions. [2021-05-02 13:24:06,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.051546391752577) internal successors, (199), 96 states have internal predecessors, (199), 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 13:24:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 285 transitions. [2021-05-02 13:24:06,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-05-02 13:24:06,950 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:06,951 INFO L523 BasicCegarLoop]: trace histogram [122, 93, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:07,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:07,151 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:07,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash 5365467, now seen corresponding path program 90 times [2021-05-02 13:24:07,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:07,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030598523] [2021-05-02 13:24:07,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:12,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:12,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 5358 proven. 8742 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2021-05-02 13:24:12,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:12,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030598523] [2021-05-02 13:24:12,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030598523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:12,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123306371] [2021-05-02 13:24:12,603 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:12,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 119 check-sat command(s) [2021-05-02 13:24:12,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:24:12,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 13:24:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:13,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:13,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:14,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:15,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:16,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:17,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:17,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 5487 proven. 841 refuted. 0 times theorem prover too weak. 8556 trivial. 0 not checked. [2021-05-02 13:24:17,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123306371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:17,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:17,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 32] total 127 [2021-05-02 13:24:17,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77752348] [2021-05-02 13:24:17,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 13:24:17,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:17,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 13:24:17,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 13:24:17,213 INFO L87 Difference]: Start difference. First operand 256 states and 285 transitions. Second operand has 127 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 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 13:24:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:32,927 INFO L93 Difference]: Finished difference Result 325 states and 387 transitions. [2021-05-02 13:24:32,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 13:24:32,928 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 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 255 [2021-05-02 13:24:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:32,929 INFO L225 Difference]: With dead ends: 325 [2021-05-02 13:24:32,929 INFO L226 Difference]: Without dead ends: 261 [2021-05-02 13:24:32,931 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7719 ImplicationChecksByTransitivity, 23897.2ms TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2021-05-02 13:24:32,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-02 13:24:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2021-05-02 13:24:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.1215686274509804) internal successors, (286), 255 states have internal predecessors, (286), 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 13:24:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 290 transitions. [2021-05-02 13:24:32,938 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 290 transitions. Word has length 255 [2021-05-02 13:24:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:32,938 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 290 transitions. [2021-05-02 13:24:32,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.0551181102362204) internal successors, (261), 126 states have internal predecessors, (261), 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 13:24:32,938 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 290 transitions. [2021-05-02 13:24:32,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-05-02 13:24:32,939 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:32,939 INFO L523 BasicCegarLoop]: trace histogram [124, 94, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:33,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-05-02 13:24:33,141 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:33,141 INFO L82 PathProgramCache]: Analyzing trace with hash -273413869, now seen corresponding path program 91 times [2021-05-02 13:24:33,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:33,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418065065] [2021-05-02 13:24:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:38,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 5605 proven. 8930 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-05-02 13:24:38,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:38,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418065065] [2021-05-02 13:24:38,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418065065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:38,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883172021] [2021-05-02 13:24:38,998 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:39,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 96 conjunts are in the unsatisfiable core [2021-05-02 13:24:39,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:39,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 5605 proven. 8930 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-05-02 13:24:39,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883172021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:39,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:39,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 97] total 99 [2021-05-02 13:24:39,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635505023] [2021-05-02 13:24:39,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 13:24:39,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:39,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 13:24:39,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 13:24:39,852 INFO L87 Difference]: Start difference. First operand 260 states and 290 transitions. Second operand has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 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 13:24:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:24:50,192 INFO L93 Difference]: Finished difference Result 328 states and 389 transitions. [2021-05-02 13:24:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 13:24:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 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 259 [2021-05-02 13:24:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:24:50,194 INFO L225 Difference]: With dead ends: 328 [2021-05-02 13:24:50,194 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 13:24:50,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4838 ImplicationChecksByTransitivity, 15553.1ms TimeCoverageRelationStatistics Valid=14066, Invalid=23376, Unknown=0, NotChecked=0, Total=37442 [2021-05-02 13:24:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 13:24:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-05-02 13:24:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.1206225680933852) internal successors, (288), 257 states have internal predecessors, (288), 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 13:24:50,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 292 transitions. [2021-05-02 13:24:50,202 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 292 transitions. Word has length 259 [2021-05-02 13:24:50,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:24:50,202 INFO L480 AbstractCegarLoop]: Abstraction has 262 states and 292 transitions. [2021-05-02 13:24:50,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.0505050505050506) internal successors, (203), 98 states have internal predecessors, (203), 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 13:24:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 292 transitions. [2021-05-02 13:24:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-05-02 13:24:50,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:24:50,204 INFO L523 BasicCegarLoop]: trace histogram [125, 95, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:24:50,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:50,417 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:24:50,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:24:50,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1077282160, now seen corresponding path program 92 times [2021-05-02 13:24:50,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:24:50,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348991757] [2021-05-02 13:24:50,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:24:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:56,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:24:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:24:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 5664 proven. 9120 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-05-02 13:24:56,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:24:56,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348991757] [2021-05-02 13:24:56,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348991757] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:56,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503651271] [2021-05-02 13:24:56,419 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:24:56,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:24:56,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:24:56,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 97 conjunts are in the unsatisfiable core [2021-05-02 13:24:56,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:24:56,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:56,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:24:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 5664 proven. 9120 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-05-02 13:24:57,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503651271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:24:57,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:24:57,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98] total 100 [2021-05-02 13:24:57,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309491289] [2021-05-02 13:24:57,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 13:24:57,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:24:57,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 13:24:57,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 13:24:57,339 INFO L87 Difference]: Start difference. First operand 262 states and 292 transitions. Second operand has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 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 13:25:08,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:25:08,047 INFO L93 Difference]: Finished difference Result 330 states and 391 transitions. [2021-05-02 13:25:08,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 13:25:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 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 261 [2021-05-02 13:25:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:25:08,050 INFO L225 Difference]: With dead ends: 330 [2021-05-02 13:25:08,050 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 13:25:08,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4937 ImplicationChecksByTransitivity, 15967.7ms TimeCoverageRelationStatistics Valid=14358, Invalid=23862, Unknown=0, NotChecked=0, Total=38220 [2021-05-02 13:25:08,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 13:25:08,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-05-02 13:25:08,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.1196911196911197) internal successors, (290), 259 states have internal predecessors, (290), 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 13:25:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 294 transitions. [2021-05-02 13:25:08,059 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 294 transitions. Word has length 261 [2021-05-02 13:25:08,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:25:08,059 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 294 transitions. [2021-05-02 13:25:08,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.05) internal successors, (205), 99 states have internal predecessors, (205), 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 13:25:08,059 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 294 transitions. [2021-05-02 13:25:08,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-05-02 13:25:08,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:25:08,060 INFO L523 BasicCegarLoop]: trace histogram [126, 96, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:25:08,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-05-02 13:25:08,260 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:25:08,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:25:08,261 INFO L82 PathProgramCache]: Analyzing trace with hash 2016042637, now seen corresponding path program 93 times [2021-05-02 13:25:08,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:25:08,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704685360] [2021-05-02 13:25:08,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:25:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:25:14,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:25:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:25:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 5723 proven. 9312 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2021-05-02 13:25:14,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:25:14,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704685360] [2021-05-02 13:25:14,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704685360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:25:14,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784048244] [2021-05-02 13:25:14,642 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:25:14,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 62 check-sat command(s) [2021-05-02 13:25:14,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:25:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:25:14,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:25:15,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:15,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:16,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:17,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:18,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:19,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:20,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:20,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:20,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 5856 proven. 900 refuted. 0 times theorem prover too weak. 9120 trivial. 0 not checked. [2021-05-02 13:25:20,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784048244] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:25:20,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:25:20,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 33] total 131 [2021-05-02 13:25:20,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787904786] [2021-05-02 13:25:20,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 13:25:20,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:25:20,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 13:25:20,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 13:25:20,222 INFO L87 Difference]: Start difference. First operand 264 states and 294 transitions. Second operand has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 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 13:25:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:25:40,049 INFO L93 Difference]: Finished difference Result 335 states and 399 transitions. [2021-05-02 13:25:40,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 13:25:40,051 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 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 263 [2021-05-02 13:25:40,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:25:40,052 INFO L225 Difference]: With dead ends: 335 [2021-05-02 13:25:40,052 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 13:25:40,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8224 ImplicationChecksByTransitivity, 29501.7ms TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2021-05-02 13:25:40,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 13:25:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2021-05-02 13:25:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.1216730038022813) internal successors, (295), 263 states have internal predecessors, (295), 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 13:25:40,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 299 transitions. [2021-05-02 13:25:40,061 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 299 transitions. Word has length 263 [2021-05-02 13:25:40,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:25:40,061 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 299 transitions. [2021-05-02 13:25:40,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.053435114503817) internal successors, (269), 130 states have internal predecessors, (269), 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 13:25:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 299 transitions. [2021-05-02 13:25:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2021-05-02 13:25:40,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:25:40,062 INFO L523 BasicCegarLoop]: trace histogram [128, 97, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:25:40,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:25:40,263 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:25:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:25:40,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1585739589, now seen corresponding path program 94 times [2021-05-02 13:25:40,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:25:40,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195730399] [2021-05-02 13:25:40,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:25:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:25:47,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:25:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:25:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 5978 proven. 9506 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-05-02 13:25:47,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:25:47,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195730399] [2021-05-02 13:25:47,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195730399] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:25:47,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083526891] [2021-05-02 13:25:47,233 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:25:47,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:25:47,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:25:47,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 99 conjunts are in the unsatisfiable core [2021-05-02 13:25:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:25:47,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:47,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:25:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 5978 proven. 9506 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-05-02 13:25:48,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083526891] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:25:48,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:25:48,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100] total 102 [2021-05-02 13:25:48,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640785471] [2021-05-02 13:25:48,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 13:25:48,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:25:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 13:25:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 13:25:48,234 INFO L87 Difference]: Start difference. First operand 268 states and 299 transitions. Second operand has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 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 13:26:01,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:26:01,043 INFO L93 Difference]: Finished difference Result 338 states and 401 transitions. [2021-05-02 13:26:01,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 13:26:01,045 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 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 267 [2021-05-02 13:26:01,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:26:01,046 INFO L225 Difference]: With dead ends: 338 [2021-05-02 13:26:01,046 INFO L226 Difference]: Without dead ends: 270 [2021-05-02 13:26:01,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5138 ImplicationChecksByTransitivity, 18818.8ms TimeCoverageRelationStatistics Valid=14951, Invalid=24849, Unknown=0, NotChecked=0, Total=39800 [2021-05-02 13:26:01,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-02 13:26:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2021-05-02 13:26:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.120754716981132) internal successors, (297), 265 states have internal predecessors, (297), 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 13:26:01,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 301 transitions. [2021-05-02 13:26:01,061 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 301 transitions. Word has length 267 [2021-05-02 13:26:01,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:26:01,061 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 301 transitions. [2021-05-02 13:26:01,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.049019607843137) internal successors, (209), 101 states have internal predecessors, (209), 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 13:26:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 301 transitions. [2021-05-02 13:26:01,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-05-02 13:26:01,062 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:26:01,063 INFO L523 BasicCegarLoop]: trace histogram [129, 98, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:26:01,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:26:01,285 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:26:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:26:01,285 INFO L82 PathProgramCache]: Analyzing trace with hash -668547422, now seen corresponding path program 95 times [2021-05-02 13:26:01,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:26:01,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966362261] [2021-05-02 13:26:01,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:26:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:26:10,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:26:10,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:26:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 6039 proven. 9702 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-05-02 13:26:10,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:26:10,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966362261] [2021-05-02 13:26:10,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966362261] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:26:10,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94264952] [2021-05-02 13:26:10,143 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:26:10,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2021-05-02 13:26:10,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:26:10,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 100 conjunts are in the unsatisfiable core [2021-05-02 13:26:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:26:10,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,943 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:10,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 16641 backedges. 6039 proven. 9702 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-05-02 13:26:11,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94264952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:26:11,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:26:11,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 101] total 103 [2021-05-02 13:26:11,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193327341] [2021-05-02 13:26:11,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 13:26:11,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:26:11,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 13:26:11,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 13:26:11,320 INFO L87 Difference]: Start difference. First operand 270 states and 301 transitions. Second operand has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 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 13:26:23,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:26:23,985 INFO L93 Difference]: Finished difference Result 340 states and 403 transitions. [2021-05-02 13:26:23,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 13:26:23,986 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 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 269 [2021-05-02 13:26:23,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:26:23,987 INFO L225 Difference]: With dead ends: 340 [2021-05-02 13:26:23,987 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 13:26:23,989 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5240 ImplicationChecksByTransitivity, 20526.7ms TimeCoverageRelationStatistics Valid=15252, Invalid=25350, Unknown=0, NotChecked=0, Total=40602 [2021-05-02 13:26:23,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 13:26:23,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2021-05-02 13:26:23,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.1198501872659177) internal successors, (299), 267 states have internal predecessors, (299), 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 13:26:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 303 transitions. [2021-05-02 13:26:23,996 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 303 transitions. Word has length 269 [2021-05-02 13:26:23,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:26:23,997 INFO L480 AbstractCegarLoop]: Abstraction has 272 states and 303 transitions. [2021-05-02 13:26:23,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 102 states have internal predecessors, (211), 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 13:26:23,997 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 303 transitions. [2021-05-02 13:26:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2021-05-02 13:26:23,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:26:23,998 INFO L523 BasicCegarLoop]: trace histogram [130, 99, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:26:24,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-05-02 13:26:24,198 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:26:24,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:26:24,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1920119487, now seen corresponding path program 96 times [2021-05-02 13:26:24,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:26:24,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530935283] [2021-05-02 13:26:24,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:26:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:26:31,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:26:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:26:31,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 6100 proven. 9900 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-05-02 13:26:31,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:26:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530935283] [2021-05-02 13:26:31,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530935283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:26:31,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804942325] [2021-05-02 13:26:31,896 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:26:32,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2021-05-02 13:26:32,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:26:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 13:26:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:26:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:32,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:32,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:32,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:32,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:32,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:33,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:34,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:35,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:36,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:37,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:26:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16900 backedges. 6237 proven. 961 refuted. 0 times theorem prover too weak. 9702 trivial. 0 not checked. [2021-05-02 13:26:38,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804942325] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:26:38,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:26:38,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 34] total 135 [2021-05-02 13:26:38,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654800882] [2021-05-02 13:26:38,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-02 13:26:38,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:26:38,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-02 13:26:38,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 13:26:38,172 INFO L87 Difference]: Start difference. First operand 272 states and 303 transitions. Second operand has 135 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 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 13:26:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:26:59,616 INFO L93 Difference]: Finished difference Result 345 states and 411 transitions. [2021-05-02 13:26:59,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-02 13:26:59,617 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 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 271 [2021-05-02 13:26:59,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:26:59,618 INFO L225 Difference]: With dead ends: 345 [2021-05-02 13:26:59,618 INFO L226 Difference]: Without dead ends: 277 [2021-05-02 13:26:59,621 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8745 ImplicationChecksByTransitivity, 32789.1ms TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2021-05-02 13:26:59,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-02 13:26:59,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2021-05-02 13:26:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.121771217712177) internal successors, (304), 271 states have internal predecessors, (304), 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 13:26:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 308 transitions. [2021-05-02 13:26:59,629 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 308 transitions. Word has length 271 [2021-05-02 13:26:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:26:59,629 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 308 transitions. [2021-05-02 13:26:59,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.051851851851852) internal successors, (277), 134 states have internal predecessors, (277), 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 13:26:59,630 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 308 transitions. [2021-05-02 13:26:59,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-05-02 13:26:59,631 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:26:59,631 INFO L523 BasicCegarLoop]: trace histogram [132, 100, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:26:59,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-02 13:26:59,833 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:26:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:26:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1583258103, now seen corresponding path program 97 times [2021-05-02 13:26:59,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:26:59,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732564203] [2021-05-02 13:26:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:26:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:07,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:07,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 6363 proven. 10100 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-05-02 13:27:07,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:07,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732564203] [2021-05-02 13:27:07,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732564203] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:07,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698252272] [2021-05-02 13:27:07,442 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:07,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 102 conjunts are in the unsatisfiable core [2021-05-02 13:27:07,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:07,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:07,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:08,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17424 backedges. 6363 proven. 10100 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-05-02 13:27:08,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698252272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:08,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:08,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 103] total 105 [2021-05-02 13:27:08,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213893845] [2021-05-02 13:27:08,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 13:27:08,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:08,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 13:27:08,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 13:27:08,541 INFO L87 Difference]: Start difference. First operand 276 states and 308 transitions. Second operand has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 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 13:27:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:21,089 INFO L93 Difference]: Finished difference Result 348 states and 413 transitions. [2021-05-02 13:27:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 13:27:21,091 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 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 275 [2021-05-02 13:27:21,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:21,092 INFO L225 Difference]: With dead ends: 348 [2021-05-02 13:27:21,092 INFO L226 Difference]: Without dead ends: 278 [2021-05-02 13:27:21,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5447 ImplicationChecksByTransitivity, 19493.3ms TimeCoverageRelationStatistics Valid=15863, Invalid=26367, Unknown=0, NotChecked=0, Total=42230 [2021-05-02 13:27:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-02 13:27:21,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2021-05-02 13:27:21,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 1.120879120879121) internal successors, (306), 273 states have internal predecessors, (306), 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 13:27:21,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 310 transitions. [2021-05-02 13:27:21,101 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 310 transitions. Word has length 275 [2021-05-02 13:27:21,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:21,101 INFO L480 AbstractCegarLoop]: Abstraction has 278 states and 310 transitions. [2021-05-02 13:27:21,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 104 states have internal predecessors, (215), 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 13:27:21,101 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 310 transitions. [2021-05-02 13:27:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-05-02 13:27:21,102 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:21,102 INFO L523 BasicCegarLoop]: trace histogram [133, 101, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:21,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:21,304 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:21,304 INFO L82 PathProgramCache]: Analyzing trace with hash 287194196, now seen corresponding path program 98 times [2021-05-02 13:27:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:21,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534847536] [2021-05-02 13:27:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:29,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 6426 proven. 10302 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-05-02 13:27:29,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534847536] [2021-05-02 13:27:29,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534847536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:29,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453189660] [2021-05-02 13:27:29,956 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:30,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:27:30,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:27:30,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 103 conjunts are in the unsatisfiable core [2021-05-02 13:27:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:30,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:30,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 17689 backedges. 6426 proven. 10302 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-05-02 13:27:31,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453189660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:31,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:31,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104] total 106 [2021-05-02 13:27:31,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828437653] [2021-05-02 13:27:31,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 13:27:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:31,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 13:27:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 13:27:31,100 INFO L87 Difference]: Start difference. First operand 278 states and 310 transitions. Second operand has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 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 13:27:41,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:27:41,285 INFO L93 Difference]: Finished difference Result 350 states and 415 transitions. [2021-05-02 13:27:41,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 13:27:41,286 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 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 277 [2021-05-02 13:27:41,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:27:41,287 INFO L225 Difference]: With dead ends: 350 [2021-05-02 13:27:41,287 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 13:27:41,289 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5552 ImplicationChecksByTransitivity, 18178.2ms TimeCoverageRelationStatistics Valid=16173, Invalid=26883, Unknown=0, NotChecked=0, Total=43056 [2021-05-02 13:27:41,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 13:27:41,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2021-05-02 13:27:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.12) internal successors, (308), 275 states have internal predecessors, (308), 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 13:27:41,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 312 transitions. [2021-05-02 13:27:41,297 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 312 transitions. Word has length 277 [2021-05-02 13:27:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:27:41,297 INFO L480 AbstractCegarLoop]: Abstraction has 280 states and 312 transitions. [2021-05-02 13:27:41,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.047169811320755) internal successors, (217), 105 states have internal predecessors, (217), 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 13:27:41,298 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 312 transitions. [2021-05-02 13:27:41,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-05-02 13:27:41,299 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:27:41,299 INFO L523 BasicCegarLoop]: trace histogram [134, 102, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:27:41,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-02 13:27:41,513 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:27:41,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:27:41,513 INFO L82 PathProgramCache]: Analyzing trace with hash 310295409, now seen corresponding path program 99 times [2021-05-02 13:27:41,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:27:41,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30485674] [2021-05-02 13:27:41,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:27:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:47,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:27:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:27:47,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 6489 proven. 10506 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-05-02 13:27:47,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:27:47,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30485674] [2021-05-02 13:27:47,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30485674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:47,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287983852] [2021-05-02 13:27:47,411 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:27:47,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 66 check-sat command(s) [2021-05-02 13:27:47,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:27:47,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 13:27:47,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:27:47,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:47,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:48,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:49,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:50,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:51,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:27:52,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17956 backedges. 6630 proven. 1024 refuted. 0 times theorem prover too weak. 10302 trivial. 0 not checked. [2021-05-02 13:27:52,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287983852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:27:52,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 13:27:52,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 35] total 139 [2021-05-02 13:27:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800580813] [2021-05-02 13:27:52,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-02 13:27:52,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:27:52,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-02 13:27:52,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 13:27:52,680 INFO L87 Difference]: Start difference. First operand 280 states and 312 transitions. Second operand has 139 states, 139 states have (on average 2.050359712230216) internal successors, (285), 138 states have internal predecessors, (285), 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)