/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 14:45:33,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 14:45:33,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 14:45:33,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 14:45:33,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 14:45:33,828 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 14:45:33,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 14:45:33,830 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 14:45:33,832 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 14:45:33,832 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 14:45:33,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 14:45:33,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 14:45:33,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 14:45:33,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 14:45:33,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 14:45:33,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 14:45:33,846 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 14:45:33,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 14:45:33,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 14:45:33,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 14:45:33,858 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 14:45:33,889 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 14:45:33,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 14:45:33,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 14:45:33,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 14:45:33,892 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 14:45:33,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 14:45:33,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 14:45:33,892 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 14:45:33,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 14:45:33,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 14:45:33,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 14:45:33,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 14:45:33,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 14:45:33,893 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 14:45:33,893 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 14:45:33,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 14:45:33,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 14:45:33,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 14:45:33,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 14:45:33,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 14:45:33,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 14:45:33,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 14:45:33,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 14:45:33,894 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 14:45:33,894 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 14:45:33,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 14:45:33,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 14:45:33,895 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 14:45:33,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 14:45:34,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 14:45:34,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 14:45:34,174 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 14:45:34,175 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 14:45:34,175 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 14:45:34,176 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-05-02 14:45:34,216 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817453058/69b5fe05e7e449108a95418a4b489ae4/FLAG548d5da08 [2021-05-02 14:45:34,599 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 14:45:34,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c [2021-05-02 14:45:34,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817453058/69b5fe05e7e449108a95418a4b489ae4/FLAG548d5da08 [2021-05-02 14:45:34,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/817453058/69b5fe05e7e449108a95418a4b489ae4 [2021-05-02 14:45:34,624 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 14:45:34,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 14:45:34,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 14:45:34,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 14:45:34,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 14:45:34,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a79cef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34, skipping insertion in model container [2021-05-02 14:45:34,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,636 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 14:45:34,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 14:45:34,768 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c[489,502] [2021-05-02 14:45:34,790 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:45:34,813 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 14:45:34,830 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound5.c[489,502] [2021-05-02 14:45:34,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 14:45:34,844 INFO L208 MainTranslator]: Completed translation [2021-05-02 14:45:34,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34 WrapperNode [2021-05-02 14:45:34,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 14:45:34,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 14:45:34,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 14:45:34,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 14:45:34,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (1/1) ... [2021-05-02 14:45:34,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 14:45:34,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 14:45:34,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 14:45:34,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 14:45:34,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (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 14:45:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 14:45:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 14:45:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 14:45:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 14:45:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 14:45:34,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 14:45:34,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 14:45:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 14:45:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 14:45:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 14:45:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 14:45:34,956 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 14:45:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 14:45:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 14:45:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 14:45:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 14:45:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 14:45:34,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 14:45:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 14:45:34,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 14:45:35,157 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 14:45:35,157 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 14:45:35,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:45:35 BoogieIcfgContainer [2021-05-02 14:45:35,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 14:45:35,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 14:45:35,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 14:45:35,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 14:45:35,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 02:45:34" (1/3) ... [2021-05-02 14:45:35,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa9bee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:45:35, skipping insertion in model container [2021-05-02 14:45:35,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 02:45:34" (2/3) ... [2021-05-02 14:45:35,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fa9bee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 02:45:35, skipping insertion in model container [2021-05-02 14:45:35,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 02:45:35" (3/3) ... [2021-05-02 14:45:35,169 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound5.c [2021-05-02 14:45:35,173 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 14:45:35,175 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 14:45:35,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 14:45:35,202 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 14:45:35,202 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 14:45:35,203 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 14:45:35,203 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 14:45:35,203 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 14:45:35,203 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 14:45:35,203 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 14:45:35,203 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 14:45:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 14:45:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 14:45:35,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:35,229 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:35,229 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:35,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:35,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-02 14:45:35,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:35,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88326562] [2021-05-02 14:45:35,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:45:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:45:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:45:35,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:45:35,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:35,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88326562] [2021-05-02 14:45:35,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88326562] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:45:35,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:45:35,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 14:45:35,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563507552] [2021-05-02 14:45:35,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 14:45:35,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:35,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 14:45:35,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:45:35,436 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:45:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:35,582 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-02 14:45:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 14:45:35,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 14:45:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:35,588 INFO L225 Difference]: With dead ends: 64 [2021-05-02 14:45:35,588 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 14:45:35,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 14:45:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 14:45:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-02 14:45:35,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:45:35,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-02 14:45:35,617 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-02 14:45:35,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:35,617 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-02 14:45:35,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:45:35,617 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-02 14:45:35,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:45:35,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:35,619 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:35,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 14:45:35,620 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:35,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-02 14:45:35,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:35,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764208371] [2021-05-02 14:45:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 14:45:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 14:45:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 14:45:35,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:45:35,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:35,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764208371] [2021-05-02 14:45:35,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764208371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:45:35,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:45:35,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:45:35,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35712512] [2021-05-02 14:45:35,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:45:35,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:35,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:45:35,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:45:35,747 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:45:35,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:35,874 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-02 14:45:35,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:45:35,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 14:45:35,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:35,875 INFO L225 Difference]: With dead ends: 42 [2021-05-02 14:45:35,876 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 14:45:35,876 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:45:35,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 14:45:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 14:45:35,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 14:45:35,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 14:45:35,883 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-02 14:45:35,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:35,884 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 14:45:35,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 14:45:35,885 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 14:45:35,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 14:45:35,885 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:35,885 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:35,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 14:45:35,886 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:35,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-02 14:45:35,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:35,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091407598] [2021-05-02 14:45:35,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:35,897 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:35,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053801052] [2021-05-02 14:45:35,897 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 14:45:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 14:45:35,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:36,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 14:45:36,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:36,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091407598] [2021-05-02 14:45:36,094 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:36,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053801052] [2021-05-02 14:45:36,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053801052] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:36,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:36,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:45:36,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114022766] [2021-05-02 14:45:36,095 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:45:36,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:36,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:45:36,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:45:36,096 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:45:36,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:36,190 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-02 14:45:36,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:45:36,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-02 14:45:36,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:36,193 INFO L225 Difference]: With dead ends: 49 [2021-05-02 14:45:36,194 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 14:45:36,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:45:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 14:45:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-02 14:45:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 14:45:36,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-02 14:45:36,218 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-02 14:45:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:36,218 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-02 14:45:36,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 14:45:36,218 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-02 14:45:36,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 14:45:36,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:36,219 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:36,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 14:45:36,420 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:36,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:36,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-02 14:45:36,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:36,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491444649] [2021-05-02 14:45:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:36,428 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:36,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746025183] [2021-05-02 14:45:36,429 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 14:45:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:36,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:45:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:36,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 14:45:36,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:36,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491444649] [2021-05-02 14:45:36,652 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:36,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746025183] [2021-05-02 14:45:36,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746025183] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:45:36,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:45:36,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:45:36,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953086303] [2021-05-02 14:45:36,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:45:36,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:45:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:45:36,656 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:45:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:36,761 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-02 14:45:36,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:45:36,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 14:45:36,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:36,766 INFO L225 Difference]: With dead ends: 71 [2021-05-02 14:45:36,766 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 14:45:36,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:45:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 14:45:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-02 14:45:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:45:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-02 14:45:36,793 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-02 14:45:36,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:36,793 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-02 14:45:36,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 14:45:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-02 14:45:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 14:45:36,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:36,796 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:37,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:37,009 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-02 14:45:37,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:37,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655375045] [2021-05-02 14:45:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:37,017 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:37,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772430063] [2021-05-02 14:45:37,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:37,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 14:45:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:37,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 14:45:37,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:37,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655375045] [2021-05-02 14:45:37,183 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:37,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772430063] [2021-05-02 14:45:37,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772430063] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:45:37,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:45:37,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 14:45:37,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486344273] [2021-05-02 14:45:37,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:45:37,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:37,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:45:37,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:45:37,184 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:45:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:37,279 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-02 14:45:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:45:37,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-05-02 14:45:37,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:37,280 INFO L225 Difference]: With dead ends: 69 [2021-05-02 14:45:37,280 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 14:45:37,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:45:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 14:45:37,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 14:45:37,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 14:45:37,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-02 14:45:37,287 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-02 14:45:37,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:37,287 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-02 14:45:37,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 14:45:37,287 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-02 14:45:37,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 14:45:37,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:37,288 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:37,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:37,489 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:37,489 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-02 14:45:37,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:37,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828729573] [2021-05-02 14:45:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:37,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:37,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669573561] [2021-05-02 14:45:37,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:37,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 14:45:37,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:45:37,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:37,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828729573] [2021-05-02 14:45:37,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:37,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669573561] [2021-05-02 14:45:37,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669573561] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 14:45:37,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 14:45:37,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 14:45:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989810211] [2021-05-02 14:45:37,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:45:37,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:37,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:45:37,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:45:37,611 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:45:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:37,666 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-02 14:45:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 14:45:37,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-02 14:45:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:37,667 INFO L225 Difference]: With dead ends: 77 [2021-05-02 14:45:37,667 INFO L226 Difference]: Without dead ends: 75 [2021-05-02 14:45:37,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:45:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-02 14:45:37,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-02 14:45:37,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-02 14:45:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-02 14:45:37,675 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-02 14:45:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:37,675 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-02 14:45:37,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-02 14:45:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-02 14:45:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:45:37,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:37,676 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:37,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:37,881 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:37,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:37,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-02 14:45:37,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:37,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256420179] [2021-05-02 14:45:37,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:37,890 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:37,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513939626] [2021-05-02 14:45:37,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:37,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 14:45:37,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:37,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:37,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:38,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:38,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:45:38,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:38,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256420179] [2021-05-02 14:45:38,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:38,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513939626] [2021-05-02 14:45:38,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513939626] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:38,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:38,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 14:45:38,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442937649] [2021-05-02 14:45:38,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 14:45:38,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:38,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 14:45:38,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 14:45:38,044 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:45:38,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:38,085 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-02 14:45:38,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 14:45:38,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-02 14:45:38,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:38,087 INFO L225 Difference]: With dead ends: 111 [2021-05-02 14:45:38,087 INFO L226 Difference]: Without dead ends: 97 [2021-05-02 14:45:38,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:45:38,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-02 14:45:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-02 14:45:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 14:45:38,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-02 14:45:38,095 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-02 14:45:38,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:38,095 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-02 14:45:38,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 14:45:38,095 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-02 14:45:38,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 14:45:38,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:38,096 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:38,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 14:45:38,306 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:38,306 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-02 14:45:38,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:38,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052250912] [2021-05-02 14:45:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:38,313 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:38,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578855207] [2021-05-02 14:45:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 14:45:38,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 14:45:38,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:38,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:45:38,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:38,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052250912] [2021-05-02 14:45:38,475 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:38,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578855207] [2021-05-02 14:45:38,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578855207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:38,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:38,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:45:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035573517] [2021-05-02 14:45:38,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:45:38,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:38,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:45:38,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:45:38,478 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:45:38,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:38,540 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-02 14:45:38,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 14:45:38,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-02 14:45:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:38,542 INFO L225 Difference]: With dead ends: 106 [2021-05-02 14:45:38,542 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 14:45:38,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:45:38,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 14:45:38,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 14:45:38,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 14:45:38,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-02 14:45:38,559 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-02 14:45:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:38,561 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-02 14:45:38,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 14:45:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-02 14:45:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 14:45:38,563 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:38,563 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:38,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:38,768 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-02 14:45:38,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:38,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900367268] [2021-05-02 14:45:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:38,775 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:38,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1343103032] [2021-05-02 14:45:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:38,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 14:45:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:38,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:38,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:38,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:45:38,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:38,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900367268] [2021-05-02 14:45:38,952 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:38,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343103032] [2021-05-02 14:45:38,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343103032] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:38,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:38,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:45:38,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500037775] [2021-05-02 14:45:38,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:45:38,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:38,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:45:38,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:45:38,953 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:45:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:39,067 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-02 14:45:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:45:39,067 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 14:45:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:39,070 INFO L225 Difference]: With dead ends: 118 [2021-05-02 14:45:39,070 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 14:45:39,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:45:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 14:45:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-02 14:45:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 14:45:39,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-02 14:45:39,091 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-02 14:45:39,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:39,091 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-02 14:45:39,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 14:45:39,091 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-02 14:45:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 14:45:39,095 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:39,095 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:39,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:39,301 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:39,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:39,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-02 14:45:39,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:39,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707449743] [2021-05-02 14:45:39,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:39,307 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:39,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550611258] [2021-05-02 14:45:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order 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 14:45:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 14:45:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:39,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 14:45:39,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:39,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707449743] [2021-05-02 14:45:39,509 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:39,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550611258] [2021-05-02 14:45:39,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550611258] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:39,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:39,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:45:39,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664736811] [2021-05-02 14:45:39,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:45:39,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:39,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:45:39,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:45:39,510 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:45:39,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:39,694 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-02 14:45:39,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:45:39,694 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 14:45:39,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:39,695 INFO L225 Difference]: With dead ends: 131 [2021-05-02 14:45:39,695 INFO L226 Difference]: Without dead ends: 129 [2021-05-02 14:45:39,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:45:39,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-02 14:45:39,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-02 14:45:39,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-02 14:45:39,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-02 14:45:39,705 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-02 14:45:39,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:39,705 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-02 14:45:39,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 14:45:39,705 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-02 14:45:39,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 14:45:39,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:39,706 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:39,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 14:45:39,921 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:39,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:39,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-02 14:45:39,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:39,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488820446] [2021-05-02 14:45:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:39,927 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:39,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141582115] [2021-05-02 14:45:39,927 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 14:45:39,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:45:39,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:39,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 14:45:39,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:40,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,106 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 14:45:40,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:40,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488820446] [2021-05-02 14:45:40,106 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:40,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141582115] [2021-05-02 14:45:40,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141582115] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:40,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:40,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:45:40,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443898730] [2021-05-02 14:45:40,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:45:40,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:40,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:45:40,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:45:40,107 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:45:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:40,227 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-02 14:45:40,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:45:40,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2021-05-02 14:45:40,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:40,229 INFO L225 Difference]: With dead ends: 151 [2021-05-02 14:45:40,229 INFO L226 Difference]: Without dead ends: 145 [2021-05-02 14:45:40,229 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:45:40,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-02 14:45:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-02 14:45:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 14:45:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-02 14:45:40,239 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-02 14:45:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:40,240 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-02 14:45:40,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 14:45:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-02 14:45:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:45:40,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:40,240 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:40,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:40,456 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:40,457 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-02 14:45:40,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:40,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394131006] [2021-05-02 14:45:40,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:40,462 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:40,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [635885727] [2021-05-02 14:45:40,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:45:40,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:45:40,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 14:45:40,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:40,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 14:45:40,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:40,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394131006] [2021-05-02 14:45:40,601 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:40,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635885727] [2021-05-02 14:45:40,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635885727] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:40,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:40,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 14:45:40,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604510261] [2021-05-02 14:45:40,602 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 14:45:40,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:40,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 14:45:40,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 14:45:40,602 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:45:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:40,651 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2021-05-02 14:45:40,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 14:45:40,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:45:40,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:40,652 INFO L225 Difference]: With dead ends: 199 [2021-05-02 14:45:40,652 INFO L226 Difference]: Without dead ends: 173 [2021-05-02 14:45:40,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 14:45:40,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-02 14:45:40,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-02 14:45:40,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-02 14:45:40,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-02 14:45:40,662 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-02 14:45:40,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:40,663 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-02 14:45:40,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:45:40,663 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-02 14:45:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:45:40,663 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:40,663 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:40,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:40,881 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:40,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:40,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2021-05-02 14:45:40,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:40,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985698852] [2021-05-02 14:45:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:40,887 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:40,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [73636313] [2021-05-02 14:45:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:40,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 14:45:40,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:40,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:40,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 14:45:41,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:41,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985698852] [2021-05-02 14:45:41,087 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:41,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73636313] [2021-05-02 14:45:41,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73636313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:41,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:41,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:45:41,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372870213] [2021-05-02 14:45:41,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:45:41,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:41,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:45:41,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:45:41,089 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:45:41,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:41,245 INFO L93 Difference]: Finished difference Result 188 states and 237 transitions. [2021-05-02 14:45:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:45:41,246 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:45:41,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:41,247 INFO L225 Difference]: With dead ends: 188 [2021-05-02 14:45:41,247 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 14:45:41,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:45:41,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 14:45:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-02 14:45:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:45:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-02 14:45:41,258 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-02 14:45:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:41,258 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-02 14:45:41,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:45:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-02 14:45:41,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 14:45:41,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:41,258 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:41,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 14:45:41,473 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:41,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:41,473 INFO L82 PathProgramCache]: Analyzing trace with hash 284565575, now seen corresponding path program 2 times [2021-05-02 14:45:41,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:41,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38574292] [2021-05-02 14:45:41,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:41,478 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:41,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143107869] [2021-05-02 14:45:41,478 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 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 14:45:41,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:45:41,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:41,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 14:45:41,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:41,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 14:45:41,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:41,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38574292] [2021-05-02 14:45:41,696 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:41,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143107869] [2021-05-02 14:45:41,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143107869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:41,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:41,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 14:45:41,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655454607] [2021-05-02 14:45:41,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 14:45:41,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:41,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 14:45:41,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:45:41,697 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:45:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:41,876 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2021-05-02 14:45:41,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 14:45:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-02 14:45:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:41,877 INFO L225 Difference]: With dead ends: 198 [2021-05-02 14:45:41,878 INFO L226 Difference]: Without dead ends: 193 [2021-05-02 14:45:41,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:45:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-02 14:45:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-02 14:45:41,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 14:45:41,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-02 14:45:41,888 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-02 14:45:41,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:41,888 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-02 14:45:41,888 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:45:41,888 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-02 14:45:41,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 14:45:41,889 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:41,889 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:42,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 14:45:42,107 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:42,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:42,107 INFO L82 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 2 times [2021-05-02 14:45:42,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:42,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905558739] [2021-05-02 14:45:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:42,112 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:42,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853483811] [2021-05-02 14:45:42,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:42,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:45:42,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:42,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:45:42,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:42,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 14:45:42,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905558739] [2021-05-02 14:45:42,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:42,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853483811] [2021-05-02 14:45:42,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853483811] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:42,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:42,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 14:45:42,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2996218] [2021-05-02 14:45:42,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 14:45:42,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:42,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 14:45:42,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-02 14:45:42,399 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:45:42,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:42,624 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2021-05-02 14:45:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:45:42,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 66 [2021-05-02 14:45:42,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:42,626 INFO L225 Difference]: With dead ends: 219 [2021-05-02 14:45:42,626 INFO L226 Difference]: Without dead ends: 217 [2021-05-02 14:45:42,626 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 113.3ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-02 14:45:42,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-02 14:45:42,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-02 14:45:42,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:45:42,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-02 14:45:42,638 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-02 14:45:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:42,638 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-02 14:45:42,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 14:45:42,638 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-02 14:45:42,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 14:45:42,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:42,638 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:42,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 14:45:42,853 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:42,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2021-05-02 14:45:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:42,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63754036] [2021-05-02 14:45:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:42,858 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:42,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47649689] [2021-05-02 14:45:42,858 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 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 14:45:42,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:45:42,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:42,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:45:42,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:43,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 14:45:43,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63754036] [2021-05-02 14:45:43,045 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:43,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47649689] [2021-05-02 14:45:43,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47649689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:43,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:43,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:45:43,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251739595] [2021-05-02 14:45:43,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:45:43,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:43,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:45:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:45:43,046 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:45:43,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:43,234 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2021-05-02 14:45:43,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:45:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-02 14:45:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:43,236 INFO L225 Difference]: With dead ends: 235 [2021-05-02 14:45:43,236 INFO L226 Difference]: Without dead ends: 233 [2021-05-02 14:45:43,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:45:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-02 14:45:43,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-02 14:45:43,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 14:45:43,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-02 14:45:43,247 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-02 14:45:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:43,248 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-02 14:45:43,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 14:45:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-02 14:45:43,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 14:45:43,248 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:43,248 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:43,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:45:43,464 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 4 times [2021-05-02 14:45:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:43,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211369144] [2021-05-02 14:45:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:43,469 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:43,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1640076008] [2021-05-02 14:45:43,469 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 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 14:45:43,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:45:43,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:43,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:45:43,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:43,812 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-05-02 14:45:43,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:43,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211369144] [2021-05-02 14:45:43,812 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:43,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640076008] [2021-05-02 14:45:43,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640076008] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:43,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:43,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:45:43,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506395589] [2021-05-02 14:45:43,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:45:43,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:43,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:45:43,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:45:43,816 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:45:44,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:44,138 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2021-05-02 14:45:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:45:44,138 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 71 [2021-05-02 14:45:44,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:44,139 INFO L225 Difference]: With dead ends: 242 [2021-05-02 14:45:44,139 INFO L226 Difference]: Without dead ends: 235 [2021-05-02 14:45:44,140 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:45:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-02 14:45:44,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-02 14:45:44,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-02 14:45:44,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-02 14:45:44,154 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-02 14:45:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:44,154 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-02 14:45:44,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:45:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-02 14:45:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 14:45:44,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:44,155 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:44,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 14:45:44,371 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:44,371 INFO L82 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2021-05-02 14:45:44,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:44,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652113558] [2021-05-02 14:45:44,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:44,376 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:44,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209897552] [2021-05-02 14:45:44,377 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 14:45:44,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:45:44,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:44,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 14:45:44,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:44,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-02 14:45:44,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:44,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652113558] [2021-05-02 14:45:44,639 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:44,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209897552] [2021-05-02 14:45:44,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209897552] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:44,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:44,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 14:45:44,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382540822] [2021-05-02 14:45:44,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 14:45:44,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 14:45:44,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:45:44,640 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:45:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:44,872 INFO L93 Difference]: Finished difference Result 220 states and 285 transitions. [2021-05-02 14:45:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:45:44,873 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-02 14:45:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:44,874 INFO L225 Difference]: With dead ends: 220 [2021-05-02 14:45:44,874 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 14:45:44,874 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:45:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 14:45:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 209. [2021-05-02 14:45:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 133 states have internal predecessors, (149), 60 states have call successors, (60), 25 states have call predecessors, (60), 24 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-02 14:45:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 265 transitions. [2021-05-02 14:45:44,886 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 265 transitions. Word has length 71 [2021-05-02 14:45:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:44,886 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 265 transitions. [2021-05-02 14:45:44,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-02 14:45:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 265 transitions. [2021-05-02 14:45:44,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:45:44,887 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:44,887 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:45,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 14:45:45,101 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:45,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:45,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 3 times [2021-05-02 14:45:45,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:45,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814623978] [2021-05-02 14:45:45,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:45,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:45,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131625586] [2021-05-02 14:45:45,107 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 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 14:45:45,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:45:45,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:45,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 14:45:45,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:45,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-02 14:45:45,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:45,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814623978] [2021-05-02 14:45:45,281 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:45,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131625586] [2021-05-02 14:45:45,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131625586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:45,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:45,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 14:45:45,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384437186] [2021-05-02 14:45:45,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 14:45:45,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:45,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 14:45:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 14:45:45,283 INFO L87 Difference]: Start difference. First operand 209 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:45:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:45,354 INFO L93 Difference]: Finished difference Result 269 states and 330 transitions. [2021-05-02 14:45:45,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 14:45:45,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 14:45:45,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:45,356 INFO L225 Difference]: With dead ends: 269 [2021-05-02 14:45:45,356 INFO L226 Difference]: Without dead ends: 243 [2021-05-02 14:45:45,356 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 26.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 14:45:45,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-02 14:45:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-02 14:45:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-02 14:45:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-02 14:45:45,371 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-02 14:45:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:45,371 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-02 14:45:45,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:45:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-02 14:45:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:45:45,372 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:45,372 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:45,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 14:45:45,590 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:45,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -122098436, now seen corresponding path program 5 times [2021-05-02 14:45:45,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:45,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317595260] [2021-05-02 14:45:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:45,602 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:45,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13074649] [2021-05-02 14:45:45,602 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 14:45:46,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 14:45:46,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:46,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 14:45:46,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:46,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 14:45:46,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:46,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317595260] [2021-05-02 14:45:46,867 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:46,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13074649] [2021-05-02 14:45:46,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13074649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:46,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:46,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:45:46,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047113309] [2021-05-02 14:45:46,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:45:46,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:45:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:45:46,869 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:45:47,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:47,025 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2021-05-02 14:45:47,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:45:47,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2021-05-02 14:45:47,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:47,026 INFO L225 Difference]: With dead ends: 266 [2021-05-02 14:45:47,026 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 14:45:47,027 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:45:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 14:45:47,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-02 14:45:47,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-02 14:45:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-02 14:45:47,039 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-02 14:45:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:47,041 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-02 14:45:47,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:45:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-02 14:45:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:45:47,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:47,042 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:47,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 14:45:47,253 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:47,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1835066184, now seen corresponding path program 6 times [2021-05-02 14:45:47,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:47,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287289914] [2021-05-02 14:45:47,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:47,261 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:47,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946576123] [2021-05-02 14:45:47,261 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 14:45:47,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 14:45:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:47,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:45:47,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:47,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 58 proven. 10 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 14:45:47,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:47,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287289914] [2021-05-02 14:45:47,504 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:47,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946576123] [2021-05-02 14:45:47,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946576123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:47,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:47,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:45:47,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134544915] [2021-05-02 14:45:47,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:45:47,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:47,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:45:47,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:45:47,506 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:45:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:56,048 INFO L93 Difference]: Finished difference Result 298 states and 373 transitions. [2021-05-02 14:45:56,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:45:56,049 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2021-05-02 14:45:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:56,050 INFO L225 Difference]: With dead ends: 298 [2021-05-02 14:45:56,050 INFO L226 Difference]: Without dead ends: 293 [2021-05-02 14:45:56,050 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:45:56,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-05-02 14:45:56,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 281. [2021-05-02 14:45:56,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 171 states have (on average 1.1637426900584795) internal successors, (199), 182 states have internal predecessors, (199), 76 states have call successors, (76), 34 states have call predecessors, (76), 33 states have return successors, (72), 64 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-02 14:45:56,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 347 transitions. [2021-05-02 14:45:56,066 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 347 transitions. Word has length 80 [2021-05-02 14:45:56,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:56,066 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 347 transitions. [2021-05-02 14:45:56,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 4 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:45:56,066 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 347 transitions. [2021-05-02 14:45:56,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:45:56,067 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:56,067 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:56,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 14:45:56,285 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:56,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:56,285 INFO L82 PathProgramCache]: Analyzing trace with hash -60058822, now seen corresponding path program 7 times [2021-05-02 14:45:56,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:56,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598255185] [2021-05-02 14:45:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:56,291 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:56,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058261247] [2021-05-02 14:45:56,291 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 14:45:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:45:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:45:56,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:56,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:56,574 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 14:45:56,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:56,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598255185] [2021-05-02 14:45:56,574 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:56,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058261247] [2021-05-02 14:45:56,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058261247] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:56,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:56,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:45:56,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797100158] [2021-05-02 14:45:56,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:45:56,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:56,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:45:56,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:45:56,575 INFO L87 Difference]: Start difference. First operand 281 states and 347 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:45:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:56,865 INFO L93 Difference]: Finished difference Result 302 states and 374 transitions. [2021-05-02 14:45:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:45:56,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 14:45:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:56,867 INFO L225 Difference]: With dead ends: 302 [2021-05-02 14:45:56,867 INFO L226 Difference]: Without dead ends: 300 [2021-05-02 14:45:56,867 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:45:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-05-02 14:45:56,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 288. [2021-05-02 14:45:56,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 176 states have (on average 1.1590909090909092) internal successors, (204), 188 states have internal predecessors, (204), 77 states have call successors, (77), 35 states have call predecessors, (77), 34 states have return successors, (73), 64 states have call predecessors, (73), 73 states have call successors, (73) [2021-05-02 14:45:56,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 354 transitions. [2021-05-02 14:45:56,883 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 354 transitions. Word has length 80 [2021-05-02 14:45:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:56,883 INFO L480 AbstractCegarLoop]: Abstraction has 288 states and 354 transitions. [2021-05-02 14:45:56,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:45:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 354 transitions. [2021-05-02 14:45:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:45:56,884 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:56,884 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:57,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-02 14:45:57,100 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:57,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:57,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1003619460, now seen corresponding path program 8 times [2021-05-02 14:45:57,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:57,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699137966] [2021-05-02 14:45:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:57,108 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:57,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1982667717] [2021-05-02 14:45:57,108 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 14:45:57,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:45:57,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:57,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 14:45:57,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:57,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 14:45:57,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:57,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699137966] [2021-05-02 14:45:57,389 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:57,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982667717] [2021-05-02 14:45:57,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982667717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:57,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:57,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:45:57,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822840230] [2021-05-02 14:45:57,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:45:57,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:57,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:45:57,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:45:57,390 INFO L87 Difference]: Start difference. First operand 288 states and 354 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:45:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:45:57,657 INFO L93 Difference]: Finished difference Result 299 states and 368 transitions. [2021-05-02 14:45:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:45:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-02 14:45:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:45:57,658 INFO L225 Difference]: With dead ends: 299 [2021-05-02 14:45:57,658 INFO L226 Difference]: Without dead ends: 297 [2021-05-02 14:45:57,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-05-02 14:45:57,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-05-02 14:45:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2021-05-02 14:45:57,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 179 states have (on average 1.1564245810055866) internal successors, (207), 192 states have internal predecessors, (207), 78 states have call successors, (78), 36 states have call predecessors, (78), 35 states have return successors, (74), 64 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:45:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 359 transitions. [2021-05-02 14:45:57,674 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 359 transitions. Word has length 80 [2021-05-02 14:45:57,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:45:57,675 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 359 transitions. [2021-05-02 14:45:57,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 14:45:57,675 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 359 transitions. [2021-05-02 14:45:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 14:45:57,676 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:45:57,676 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:45:57,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-02 14:45:57,893 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:45:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:45:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash 771387902, now seen corresponding path program 9 times [2021-05-02 14:45:57,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:45:57,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628565964] [2021-05-02 14:45:57,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:45:57,900 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:45:57,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1077391615] [2021-05-02 14:45:57,900 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 14:45:57,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:45:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:45:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 14:45:57,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:45:57,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:57,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:45:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 55 proven. 13 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-05-02 14:45:58,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:45:58,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628565964] [2021-05-02 14:45:58,114 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:45:58,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077391615] [2021-05-02 14:45:58,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077391615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:45:58,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:45:58,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 14:45:58,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717574396] [2021-05-02 14:45:58,115 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 14:45:58,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:45:58,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 14:45:58,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-05-02 14:45:58,115 INFO L87 Difference]: Start difference. First operand 293 states and 359 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:46:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:46:02,416 INFO L93 Difference]: Finished difference Result 316 states and 391 transitions. [2021-05-02 14:46:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 14:46:02,416 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 80 [2021-05-02 14:46:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:46:02,418 INFO L225 Difference]: With dead ends: 316 [2021-05-02 14:46:02,418 INFO L226 Difference]: Without dead ends: 314 [2021-05-02 14:46:02,418 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-02 14:46:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-05-02 14:46:02,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 283. [2021-05-02 14:46:02,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 175 states have (on average 1.1485714285714286) internal successors, (201), 189 states have internal predecessors, (201), 72 states have call successors, (72), 36 states have call predecessors, (72), 35 states have return successors, (68), 57 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 14:46:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 341 transitions. [2021-05-02 14:46:02,433 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 341 transitions. Word has length 80 [2021-05-02 14:46:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:46:02,433 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 341 transitions. [2021-05-02 14:46:02,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 14:46:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 341 transitions. [2021-05-02 14:46:02,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:46:02,433 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:46:02,434 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:46:02,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:46:02,653 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:46:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:46:02,653 INFO L82 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 3 times [2021-05-02 14:46:02,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:46:02,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66018760] [2021-05-02 14:46:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:46:02,662 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:46:02,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1494754296] [2021-05-02 14:46:02,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:46:02,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 14:46:02,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:46:02,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 14:46:02,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:46:02,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 46 proven. 37 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-05-02 14:46:02,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:46:02,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66018760] [2021-05-02 14:46:02,982 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:46:02,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494754296] [2021-05-02 14:46:02,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494754296] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:46:02,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:46:02,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:46:02,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590600504] [2021-05-02 14:46:02,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:46:02,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:46:02,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:46:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:46:02,985 INFO L87 Difference]: Start difference. First operand 283 states and 341 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:46:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:46:03,301 INFO L93 Difference]: Finished difference Result 318 states and 395 transitions. [2021-05-02 14:46:03,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:46:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-02 14:46:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:46:03,302 INFO L225 Difference]: With dead ends: 318 [2021-05-02 14:46:03,303 INFO L226 Difference]: Without dead ends: 316 [2021-05-02 14:46:03,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:46:03,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-02 14:46:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 294. [2021-05-02 14:46:03,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 182 states have (on average 1.1538461538461537) internal successors, (210), 196 states have internal predecessors, (210), 75 states have call successors, (75), 37 states have call predecessors, (75), 36 states have return successors, (71), 60 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 14:46:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 356 transitions. [2021-05-02 14:46:03,321 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 356 transitions. Word has length 85 [2021-05-02 14:46:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:46:03,321 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 356 transitions. [2021-05-02 14:46:03,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-02 14:46:03,322 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 356 transitions. [2021-05-02 14:46:03,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:46:03,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:46:03,323 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:46:03,536 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-02 14:46:03,537 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:46:03,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:46:03,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 10 times [2021-05-02 14:46:03,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:46:03,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034960674] [2021-05-02 14:46:03,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:46:03,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:46:03,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667387643] [2021-05-02 14:46:03,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:46:03,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 14:46:03,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:46:03,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 14:46:03,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:46:03,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:03,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,539 WARN L205 SmtUtils]: Spent 5.42 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 14:46:09,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:09,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 60 proven. 44 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-05-02 14:46:11,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:46:11,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034960674] [2021-05-02 14:46:11,818 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:46:11,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667387643] [2021-05-02 14:46:11,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667387643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:46:11,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:46:11,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:46:11,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456042424] [2021-05-02 14:46:11,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:46:11,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:46:11,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:46:11,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=149, Unknown=1, NotChecked=0, Total=182 [2021-05-02 14:46:11,820 INFO L87 Difference]: Start difference. First operand 294 states and 356 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 14:46:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:46:16,243 INFO L93 Difference]: Finished difference Result 339 states and 418 transitions. [2021-05-02 14:46:16,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:46:16,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 85 [2021-05-02 14:46:16,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:46:16,245 INFO L225 Difference]: With dead ends: 339 [2021-05-02 14:46:16,245 INFO L226 Difference]: Without dead ends: 337 [2021-05-02 14:46:16,245 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 7867.8ms TimeCoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2021-05-02 14:46:16,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-05-02 14:46:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 313. [2021-05-02 14:46:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 209 states have internal predecessors, (224), 78 states have call successors, (78), 40 states have call predecessors, (78), 39 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:46:16,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 376 transitions. [2021-05-02 14:46:16,264 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 376 transitions. Word has length 85 [2021-05-02 14:46:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:46:16,265 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 376 transitions. [2021-05-02 14:46:16,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 14:46:16,265 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 376 transitions. [2021-05-02 14:46:16,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:46:16,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:46:16,266 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:46:16,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 14:46:16,481 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:46:16,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:46:16,481 INFO L82 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 11 times [2021-05-02 14:46:16,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:46:16,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181817923] [2021-05-02 14:46:16,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:46:16,487 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:46:16,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794662389] [2021-05-02 14:46:16,488 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 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 14:46:16,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 14:46:16,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:46:16,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 14:46:16,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:46:16,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 22 proven. 58 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-02 14:46:16,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:46:16,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181817923] [2021-05-02 14:46:16,904 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:46:16,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794662389] [2021-05-02 14:46:16,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794662389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:46:16,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:46:16,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:46:16,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742568636] [2021-05-02 14:46:16,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:46:16,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:46:16,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:46:16,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:46:16,905 INFO L87 Difference]: Start difference. First operand 313 states and 376 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:46:17,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:46:17,258 INFO L93 Difference]: Finished difference Result 347 states and 428 transitions. [2021-05-02 14:46:17,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:46:17,259 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 85 [2021-05-02 14:46:17,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:46:17,260 INFO L225 Difference]: With dead ends: 347 [2021-05-02 14:46:17,260 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 14:46:17,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:46:17,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 14:46:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 313. [2021-05-02 14:46:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 195 states have (on average 1.1487179487179486) internal successors, (224), 209 states have internal predecessors, (224), 78 states have call successors, (78), 40 states have call predecessors, (78), 39 states have return successors, (74), 63 states have call predecessors, (74), 74 states have call successors, (74) [2021-05-02 14:46:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 376 transitions. [2021-05-02 14:46:17,279 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 376 transitions. Word has length 85 [2021-05-02 14:46:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:46:17,280 INFO L480 AbstractCegarLoop]: Abstraction has 313 states and 376 transitions. [2021-05-02 14:46:17,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 14:46:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 376 transitions. [2021-05-02 14:46:17,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-02 14:46:17,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:46:17,280 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:46:17,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-02 14:46:17,497 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:46:17,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:46:17,497 INFO L82 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 12 times [2021-05-02 14:46:17,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:46:17,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031271774] [2021-05-02 14:46:17,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:46:17,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:46:17,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131985387] [2021-05-02 14:46:17,502 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 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 14:46:17,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 14:46:17,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:46:17,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 14:46:17,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:46:17,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:17,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:17,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:17,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 46 proven. 38 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-02 14:46:17,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:46:17,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031271774] [2021-05-02 14:46:17,713 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:46:17,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131985387] [2021-05-02 14:46:17,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131985387] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:46:17,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:46:17,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 14:46:17,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511556865] [2021-05-02 14:46:17,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 14:46:17,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:46:17,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 14:46:17,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 14:46:17,715 INFO L87 Difference]: Start difference. First operand 313 states and 376 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:46:19,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:46:19,921 INFO L93 Difference]: Finished difference Result 338 states and 410 transitions. [2021-05-02 14:46:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 14:46:19,922 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 85 [2021-05-02 14:46:19,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:46:19,923 INFO L225 Difference]: With dead ends: 338 [2021-05-02 14:46:19,923 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 14:46:19,924 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-02 14:46:19,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 14:46:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 306. [2021-05-02 14:46:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 190 states have (on average 1.1210526315789473) internal successors, (213), 206 states have internal predecessors, (213), 75 states have call successors, (75), 41 states have call predecessors, (75), 40 states have return successors, (71), 58 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-02 14:46:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 359 transitions. [2021-05-02 14:46:19,942 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 359 transitions. Word has length 85 [2021-05-02 14:46:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:46:19,943 INFO L480 AbstractCegarLoop]: Abstraction has 306 states and 359 transitions. [2021-05-02 14:46:19,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 14:46:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 359 transitions. [2021-05-02 14:46:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:46:19,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:46:19,943 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:46:20,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:46:20,157 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:46:20,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:46:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 13 times [2021-05-02 14:46:20,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:46:20,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505796857] [2021-05-02 14:46:20,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:46:20,163 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:46:20,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823650573] [2021-05-02 14:46:20,163 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 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 14:46:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 14:46:20,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 14:46:20,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:46:20,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-05-02 14:46:20,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:46:20,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505796857] [2021-05-02 14:46:20,529 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:46:20,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823650573] [2021-05-02 14:46:20,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823650573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:46:20,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:46:20,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:46:20,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201270844] [2021-05-02 14:46:20,530 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:46:20,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:46:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:46:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:46:20,530 INFO L87 Difference]: Start difference. First operand 306 states and 359 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 14:46:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:46:20,918 INFO L93 Difference]: Finished difference Result 339 states and 413 transitions. [2021-05-02 14:46:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 14:46:20,918 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 90 [2021-05-02 14:46:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:46:20,919 INFO L225 Difference]: With dead ends: 339 [2021-05-02 14:46:20,920 INFO L226 Difference]: Without dead ends: 332 [2021-05-02 14:46:20,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:46:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-05-02 14:46:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 327. [2021-05-02 14:46:20,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 220 states have internal predecessors, (230), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (78), 64 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:46:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2021-05-02 14:46:20,941 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 90 [2021-05-02 14:46:20,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:46:20,941 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2021-05-02 14:46:20,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2021-05-02 14:46:20,942 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2021-05-02 14:46:20,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:46:20,942 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:46:20,942 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:46:21,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-02 14:46:21,149 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:46:21,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:46:21,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 14 times [2021-05-02 14:46:21,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:46:21,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606218935] [2021-05-02 14:46:21,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:46:21,153 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:46:21,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1485527410] [2021-05-02 14:46:21,153 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 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 14:46:21,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 14:46:21,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:46:21,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 72 conjunts are in the unsatisfiable core [2021-05-02 14:46:21,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:46:21,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 63 proven. 82 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-02 14:46:21,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:46:21,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606218935] [2021-05-02 14:46:21,568 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:46:21,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485527410] [2021-05-02 14:46:21,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485527410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:46:21,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:46:21,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:46:21,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920106] [2021-05-02 14:46:21,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 14:46:21,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:46:21,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 14:46:21,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 14:46:21,569 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 14:46:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:46:21,960 INFO L93 Difference]: Finished difference Result 357 states and 440 transitions. [2021-05-02 14:46:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 14:46:21,960 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 90 [2021-05-02 14:46:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:46:21,962 INFO L225 Difference]: With dead ends: 357 [2021-05-02 14:46:21,962 INFO L226 Difference]: Without dead ends: 350 [2021-05-02 14:46:21,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 14:46:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-05-02 14:46:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 327. [2021-05-02 14:46:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 203 states have (on average 1.1330049261083743) internal successors, (230), 220 states have internal predecessors, (230), 82 states have call successors, (82), 42 states have call predecessors, (82), 41 states have return successors, (78), 64 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-02 14:46:21,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2021-05-02 14:46:21,983 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 90 [2021-05-02 14:46:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:46:21,984 INFO L480 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2021-05-02 14:46:21,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 12 states have internal predecessors, (33), 6 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2021-05-02 14:46:21,984 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2021-05-02 14:46:21,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 14:46:21,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 14:46:21,985 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 14:46:22,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 14:46:22,200 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 14:46:22,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 14:46:22,201 INFO L82 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 15 times [2021-05-02 14:46:22,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 14:46:22,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091313792] [2021-05-02 14:46:22,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 14:46:22,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 14:46:22,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741033388] [2021-05-02 14:46:22,206 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 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 14:46:22,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 14:46:22,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 14:46:22,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 14:46:22,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 14:46:22,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,333 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:22,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,807 WARN L205 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2021-05-02 14:46:26,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:26,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 14:46:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 71 proven. 37 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-05-02 14:46:27,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 14:46:27,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091313792] [2021-05-02 14:46:27,232 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 14:46:27,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741033388] [2021-05-02 14:46:27,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741033388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 14:46:27,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 14:46:27,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 14:46:27,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33904242] [2021-05-02 14:46:27,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 14:46:27,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 14:46:27,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 14:46:27,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-05-02 14:46:27,233 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:46:47,432 WARN L205 SmtUtils]: Spent 12.27 s on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-05-02 14:46:54,217 WARN L205 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2021-05-02 14:47:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 14:47:04,915 INFO L93 Difference]: Finished difference Result 391 states and 503 transitions. [2021-05-02 14:47:04,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 14:47:04,915 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 90 [2021-05-02 14:47:04,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 14:47:04,915 INFO L225 Difference]: With dead ends: 391 [2021-05-02 14:47:04,915 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 14:47:04,917 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 23150.1ms TimeCoverageRelationStatistics Valid=114, Invalid=641, Unknown=1, NotChecked=0, Total=756 [2021-05-02 14:47:04,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 14:47:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 14:47:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 14:47:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 14:47:04,917 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2021-05-02 14:47:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 14:47:04,917 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 14:47:04,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-02 14:47:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 14:47:04,917 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 14:47:05,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-02 14:47:05,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 14:47:05,288 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 292 DAG size of output: 259 [2021-05-02 14:47:49,054 WARN L205 SmtUtils]: Spent 43.13 s on a formula simplification. DAG size of input: 258 DAG size of output: 34 [2021-05-02 14:47:57,784 WARN L205 SmtUtils]: Spent 8.68 s on a formula simplification. DAG size of input: 228 DAG size of output: 64 [2021-05-02 14:48:00,024 WARN L205 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 156 DAG size of output: 37 [2021-05-02 14:48:00,723 WARN L205 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 37 [2021-05-02 14:48:02,670 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 233 DAG size of output: 40 [2021-05-02 14:48:09,292 WARN L205 SmtUtils]: Spent 6.62 s on a formula simplification. DAG size of input: 257 DAG size of output: 40 [2021-05-02 14:48:09,295 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-02 14:48:09,295 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-02 14:48:09,295 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-02 14:48:09,295 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (= ~counter~0 0) (exists ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) [2021-05-02 14:48:09,296 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point L25(line 25) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 58) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point L56(line 56) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L194 CegarLoopUtils]: At program point L54(line 54) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and (= main_~b~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse0 .cse1) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and (= main_~q~0 0) .cse0 (= main_~b~0 main_~y~0) .cse1 (= main_~p~0 1) (= main_~s~0 1)))) [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 58) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L198 CegarLoopUtils]: For program point L42(lines 42 50) no Hoare annotation was computed. [2021-05-02 14:48:09,296 INFO L194 CegarLoopUtils]: At program point L42-2(lines 34 51) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (< 0 main_~a~0)) (and .cse0 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1 (<= 0 main_~b~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)))) [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0)) (.cse3 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)))) (or (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 .cse1 (<= 0 main_~b~0) .cse2 .cse3) (and .cse0 .cse1 .cse2 .cse3 (< 0 main_~a~0)))) [2021-05-02 14:48:09,297 INFO L198 CegarLoopUtils]: For program point L34-1(lines 34 51) no Hoare annotation was computed. [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point L34-3(lines 34 51) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (< 0 main_~a~0)) (and .cse0 .cse2 .cse1 (<= 0 main_~b~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 .cse2 (= main_~b~0 main_~a~0) .cse1 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0))))) [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 19 58) the Hoare annotation is: (or (forall ((.unlet.12 Int) (.unlet.13 Int)) (not (= (select (select |#memory_int| .unlet.13) (+ .unlet.12 1)) 0))) (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (forall ((.unlet.8 Int) (.unlet.9 Int)) (not (= (select (select |#memory_int| .unlet.9) (+ .unlet.8 1)) 0))) (= ~counter~0 |old(~counter~0)|) (not (= |old(~counter~0)| 0))) [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (or (and (<= 1 main_~x~0) (= ~counter~0 |old(~counter~0)|)) (not (= |old(~counter~0)| 0)) (forall ((.unlet.4 Int) (.unlet.5 Int)) (not (= (select (select |#memory_int| .unlet.5) (+ .unlet.4 1)) 0)))) [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point L55(line 55) the Hoare annotation is: (let ((.cse5 (= main_~s~0 1)) (.cse2 (= (+ main_~q~0 1) 0)) (.cse3 (+ main_~x~0 main_~b~0)) (.cse0 (= main_~b~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse1 (<= 1 main_~x~0)) (.cse4 (<= 1 main_~y~0))) (or (and .cse0 .cse1 .cse2 (= main_~y~0 .cse3) .cse4 .cse5) (and (= main_~y~0 (+ (* main_~x~0 2) main_~b~0)) .cse0 .cse1 (= (* main_~x~0 (div (* main_~q~0 (- 1)) 2)) main_~x~0) .cse4 (= (mod main_~q~0 2) 0) .cse5) (and (= main_~q~0 0) .cse1 (= main_~b~0 main_~y~0) .cse4 .cse5) (let ((.cse6 (* main_~y~0 2))) (and .cse0 .cse1 .cse2 (= main_~s~0 2) (= .cse6 .cse3) (not (= .cse6 main_~x~0)) (< main_~y~0 main_~x~0) .cse4 (<= main_~x~0 (* 2 main_~y~0)))) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 .cse1 .cse4 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0))))) [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point L53(line 53) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse2 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse3 (= main_~b~0 main_~a~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (< 0 main_~a~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 .cse2 .cse3 .cse1 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0))) (and .cse0 .cse2 .cse3 .cse1 (<= 0 main_~b~0)))) [2021-05-02 14:48:09,297 INFO L198 CegarLoopUtils]: For program point L37(lines 34 51) no Hoare annotation was computed. [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 .cse1 (< 0 main_~a~0)) (and .cse0 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1 (<= 0 main_~b~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)))) [2021-05-02 14:48:09,297 INFO L194 CegarLoopUtils]: At program point L35-1(line 35) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0)) (.cse2 (= (+ (* main_~q~0 main_~r~0) 1) (* main_~p~0 main_~s~0)))) (or (and .cse0 .cse1 .cse2 (< 0 main_~a~0)) (forall ((|#t~string4.offset| Int) (|#t~string4.base| Int)) (not (= (select (select |#memory_int| |#t~string4.base|) (+ |#t~string4.offset| 1)) 0))) (not (= |old(~counter~0)| 0)) (and .cse0 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 0 main_~b~0) .cse1 .cse2))) [2021-05-02 14:48:09,297 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-02 14:48:09,297 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-02 14:48:09,298 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-02 14:48:09,298 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:48:09,298 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-02 14:48:09,298 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-02 14:48:09,303 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] [2021-05-02 14:48:09,304 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] [2021-05-02 14:48:09,309 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] [2021-05-02 14:48:09,309 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] [2021-05-02 14:48:09,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 02:48:09 BoogieIcfgContainer [2021-05-02 14:48:09,310 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 14:48:09,310 INFO L168 Benchmark]: Toolchain (without parser) took 154684.66 ms. Allocated memory was 166.7 MB in the beginning and 289.4 MB in the end (delta: 122.7 MB). Free memory was 130.4 MB in the beginning and 242.7 MB in the end (delta: -112.3 MB). Peak memory consumption was 158.4 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:09,310 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 166.7 MB. Free memory was 146.8 MB in the beginning and 146.7 MB in the end (delta: 107.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 14:48:09,310 INFO L168 Benchmark]: CACSL2BoogieTranslator took 217.12 ms. Allocated memory is still 166.7 MB. Free memory was 130.2 MB in the beginning and 148.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:09,310 INFO L168 Benchmark]: Boogie Preprocessor took 38.19 ms. Allocated memory is still 166.7 MB. Free memory was 148.0 MB in the beginning and 146.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:09,310 INFO L168 Benchmark]: RCFGBuilder took 272.20 ms. Allocated memory is still 166.7 MB. Free memory was 146.5 MB in the beginning and 130.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:09,310 INFO L168 Benchmark]: TraceAbstraction took 154150.62 ms. Allocated memory was 166.7 MB in the beginning and 289.4 MB in the end (delta: 122.7 MB). Free memory was 129.7 MB in the beginning and 242.7 MB in the end (delta: -113.0 MB). Peak memory consumption was 157.6 MB. Max. memory is 8.0 GB. [2021-05-02 14:48:09,311 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 166.7 MB. Free memory was 146.8 MB in the beginning and 146.7 MB in the end (delta: 107.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 217.12 ms. Allocated memory is still 166.7 MB. Free memory was 130.2 MB in the beginning and 148.0 MB in the end (delta: -17.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.19 ms. Allocated memory is still 166.7 MB. Free memory was 148.0 MB in the beginning and 146.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 272.20 ms. Allocated memory is still 166.7 MB. Free memory was 146.5 MB in the beginning and 130.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 154150.62 ms. Allocated memory was 166.7 MB in the beginning and 289.4 MB in the end (delta: 122.7 MB). Free memory was 129.7 MB in the beginning and 242.7 MB in the end (delta: -113.0 MB). Peak memory consumption was 157.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 89917.9ms, OverallIterations: 31, TraceHistogramMax: 12, EmptinessCheckTime: 41.3ms, AutomataDifference: 61983.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 64176.2ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1270 SDtfs, 800 SDslu, 6688 SDs, 0 SdLazy, 7065 SolverSat, 769 SolverUnsat, 15 SolverUnknown, 0 SolverNotchecked, 40237.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1998 GetRequests, 1636 SyntacticMatches, 12 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 33445.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=327occurred in iteration=29, InterpolantAutomatonStates: 317, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 429.9ms AutomataMinimizationTime, 31 MinimizatonAttempts, 312 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 16 LocationsWithAnnotation, 218 PreInvPairs, 408 NumberOfFragments, 708 HoareAnnotationTreeSize, 218 FomulaSimplifications, 17781314 FormulaSimplificationTreeSizeReduction, 796.3ms HoareSimplificationTime, 16 FomulaSimplificationsInter, 3212551 FormulaSimplificationTreeSizeReductionInter, 63354.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 256.2ms SsaConstructionTime, 1930.3ms SatisfiabilityAnalysisTime, 18217.8ms InterpolantComputationTime, 1942 NumberOfCodeBlocks, 1810 NumberOfCodeBlocksAsserted, 71 NumberOfCheckSat, 1911 ConstructedInterpolants, 2 QuantifiedInterpolants, 12270 SizeOfPredicates, 151 NumberOfNonLiveVariables, 6082 ConjunctsInSsa, 936 ConjunctsInUnsatCore, 31 InterpolantComputations, 5 PerfectInterpolantSequences, 3162/4000 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant [2021-05-02 14:48:09,312 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] [2021-05-02 14:48:09,312 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] [2021-05-02 14:48:09,312 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.base,QUANTIFIED] [2021-05-02 14:48:09,312 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[#t~string4.offset,QUANTIFIED] Derived loop invariant: ((((1 <= x && 1 <= y) && 0 < a) || (((1 <= x && a == y * r + x * p) && 1 <= y) && 0 <= b)) || (forall #t~string4.offset : int, #t~string4.base : int :: !(unknown-#memory_int-unknown[#t~string4.base][#t~string4.offset + 1] == 0))) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! [MP z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process Received shutdown request...