/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/hard-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:25:25,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:25:25,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:25:25,645 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 15:25:25,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:25:25,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:25:25,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:25:25,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:25:25,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:25:25,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:25:25,669 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:25:25,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:25:25,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:25:25,675 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:25:25,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:25:25,678 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:25:25,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 15:25:25,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:25:25,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:25:25,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:25:25,691 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 15:25:25,720 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:25:25,720 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:25:25,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:25:25,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:25:25,722 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:25:25,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:25:25,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:25:25,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:25:25,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:25:25,723 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:25:25,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:25:25,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:25:25,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:25:25,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:25:25,724 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:25:25,724 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:25:25,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:25:25,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:25:25,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:25:25,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:25:25,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:25,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:25:25,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:25:25,725 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:25:25,725 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:25:25,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:25:25,725 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:25:25,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:25:25,726 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:25:25,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:25:25,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:25:25,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:25:25,997 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:25:25,997 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:25:25,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c [2021-05-02 15:25:26,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ab91ce71/b6651be34f094f0ba57bdecc85c5cc99/FLAG978b5e4ca [2021-05-02 15:25:26,387 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:25:26,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_unwindbound10.c [2021-05-02 15:25:26,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ab91ce71/b6651be34f094f0ba57bdecc85c5cc99/FLAG978b5e4ca [2021-05-02 15:25:26,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ab91ce71/b6651be34f094f0ba57bdecc85c5cc99 [2021-05-02 15:25:26,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:25:26,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:25:26,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:26,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:25:26,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:25:26,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@286838a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26, skipping insertion in model container [2021-05-02 15:25:26,408 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:25:26,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:25:26,513 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/hard-ll_unwindbound10.c[546,559] [2021-05-02 15:25:26,532 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:26,539 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:25:26,577 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/hard-ll_unwindbound10.c[546,559] [2021-05-02 15:25:26,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:25:26,606 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:25:26,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26 WrapperNode [2021-05-02 15:25:26,607 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:25:26,608 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:25:26,608 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:25:26,608 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:25:26,615 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (1/1) ... [2021-05-02 15:25:26,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:25:26,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:25:26,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:25:26,641 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:25:26,641 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:25:26,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:25:26,700 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:25:26,700 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:25:26,700 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:25:26,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:25:26,701 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:25:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:25:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:25:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:25:26,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:25:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 15:25:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:25:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:25:26,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:25:26,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:25:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:25:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:25:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:25:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:25:26,704 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:25:26,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:25:26,974 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 15:25:26,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:26 BoogieIcfgContainer [2021-05-02 15:25:26,975 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:25:26,976 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:25:26,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:25:26,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:25:26,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:25:26" (1/3) ... [2021-05-02 15:25:26,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742b0cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:26, skipping insertion in model container [2021-05-02 15:25:26,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:25:26" (2/3) ... [2021-05-02 15:25:26,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742b0cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:25:26, skipping insertion in model container [2021-05-02 15:25:26,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:25:26" (3/3) ... [2021-05-02 15:25:26,981 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_unwindbound10.c [2021-05-02 15:25:26,984 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:25:26,987 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:25:26,999 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:25:27,030 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:25:27,031 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:25:27,031 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:25:27,031 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:25:27,031 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:25:27,031 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:25:27,031 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:25:27,032 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:25:27,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:25:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:27,050 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:27,051 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:27,051 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:27,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:27,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1191571617, now seen corresponding path program 1 times [2021-05-02 15:25:27,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:27,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762551475] [2021-05-02 15:25:27,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:27,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:27,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:27,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:27,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762551475] [2021-05-02 15:25:27,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762551475] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:27,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:27,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:25:27,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839824291] [2021-05-02 15:25:27,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:25:27,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:27,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:25:27,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:27,323 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:27,485 INFO L93 Difference]: Finished difference Result 66 states and 101 transitions. [2021-05-02 15:25:27,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:25:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:27,491 INFO L225 Difference]: With dead ends: 66 [2021-05-02 15:25:27,491 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 15:25:27,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:25:27,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 15:25:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-05-02 15:25:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2021-05-02 15:25:27,546 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2021-05-02 15:25:27,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:27,547 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2021-05-02 15:25:27,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:27,547 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2021-05-02 15:25:27,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 15:25:27,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:27,548 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:27,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:25:27,549 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:27,549 INFO L82 PathProgramCache]: Analyzing trace with hash 336486197, now seen corresponding path program 1 times [2021-05-02 15:25:27,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:27,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089706163] [2021-05-02 15:25:27,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:27,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:27,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:27,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:27,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089706163] [2021-05-02 15:25:27,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089706163] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:27,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:27,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:27,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280700480] [2021-05-02 15:25:27,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:27,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:27,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:27,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:27,671 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:27,850 INFO L93 Difference]: Finished difference Result 47 states and 62 transitions. [2021-05-02 15:25:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 15:25:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:27,852 INFO L225 Difference]: With dead ends: 47 [2021-05-02 15:25:27,852 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 15:25:27,853 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 15:25:27,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2021-05-02 15:25:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-02 15:25:27,860 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 18 [2021-05-02 15:25:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:27,860 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-02 15:25:27,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 15:25:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-02 15:25:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 15:25:27,861 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:27,861 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:27,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 15:25:27,861 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:27,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1819267188, now seen corresponding path program 1 times [2021-05-02 15:25:27,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:27,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025046910] [2021-05-02 15:25:27,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:27,876 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:27,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658191845] [2021-05-02 15:25:27,876 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 15:25:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 15:25:27,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:27,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:27,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:27,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:28,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:28,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:28,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:28,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025046910] [2021-05-02 15:25:28,059 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:28,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658191845] [2021-05-02 15:25:28,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658191845] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:28,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:28,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 15:25:28,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223022261] [2021-05-02 15:25:28,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 15:25:28,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:28,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 15:25:28,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:28,061 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:28,072 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2021-05-02 15:25:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 15:25:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 15:25:28,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:28,073 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:28,073 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 15:25:28,073 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 15:25:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 15:25:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 15:25:28,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 47 transitions. [2021-05-02 15:25:28,086 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 47 transitions. Word has length 20 [2021-05-02 15:25:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:28,086 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 47 transitions. [2021-05-02 15:25:28,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 15:25:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 47 transitions. [2021-05-02 15:25:28,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 15:25:28,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:28,087 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:28,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 15:25:28,301 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:28,301 INFO L82 PathProgramCache]: Analyzing trace with hash -784889968, now seen corresponding path program 1 times [2021-05-02 15:25:28,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:28,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094454798] [2021-05-02 15:25:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:28,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:25:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:28,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:25:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:28,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-05-02 15:25:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:28,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 15:25:28,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:28,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094454798] [2021-05-02 15:25:28,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094454798] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:28,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:28,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 15:25:28,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420233390] [2021-05-02 15:25:28,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:28,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:28,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:28,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:28,379 INFO L87 Difference]: Start difference. First operand 38 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:28,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:28,583 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2021-05-02 15:25:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:28,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 15:25:28,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:28,596 INFO L225 Difference]: With dead ends: 52 [2021-05-02 15:25:28,597 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 15:25:28,597 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:28,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 15:25:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-05-02 15:25:28,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:25:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 15:25:28,604 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 23 [2021-05-02 15:25:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:28,604 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 15:25:28,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 15:25:28,604 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 15:25:28,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 15:25:28,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:28,605 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:28,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 15:25:28,605 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:28,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1024624683, now seen corresponding path program 1 times [2021-05-02 15:25:28,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:28,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720491443] [2021-05-02 15:25:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:28,624 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:28,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904405983] [2021-05-02 15:25:28,624 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 15:25:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:28,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:28,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 15:25:28,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:28,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720491443] [2021-05-02 15:25:28,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:28,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904405983] [2021-05-02 15:25:28,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904405983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:28,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:28,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:25:28,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131526026] [2021-05-02 15:25:28,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:25:28,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:28,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:25:28,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:28,847 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:25:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:28,979 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2021-05-02 15:25:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:28,979 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 15:25:28,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:28,982 INFO L225 Difference]: With dead ends: 75 [2021-05-02 15:25:28,982 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:28,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:28,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 38 states have internal predecessors, (44), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:29,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2021-05-02 15:25:29,007 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 28 [2021-05-02 15:25:29,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:29,008 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2021-05-02 15:25:29,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 15:25:29,008 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2021-05-02 15:25:29,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:29,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:29,009 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-02 15:25:29,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:29,227 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:29,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1301357193, now seen corresponding path program 1 times [2021-05-02 15:25:29,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:29,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811266530] [2021-05-02 15:25:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:29,237 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:29,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232236632] [2021-05-02 15:25:29,237 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 15:25:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:25:29,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:29,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,381 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:29,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:29,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811266530] [2021-05-02 15:25:29,381 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:29,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232236632] [2021-05-02 15:25:29,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232236632] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:29,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:29,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 15:25:29,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290255967] [2021-05-02 15:25:29,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:25:29,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:29,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:25:29,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:29,383 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:29,422 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2021-05-02 15:25:29,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 15:25:29,423 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 15:25:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:29,424 INFO L225 Difference]: With dead ends: 76 [2021-05-02 15:25:29,424 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 15:25:29,424 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:29,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 15:25:29,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-05-02 15:25:29,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 15:25:29,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 15:25:29,430 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 36 [2021-05-02 15:25:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:29,430 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 15:25:29,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 15:25:29,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 15:25:29,431 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:29,431 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-02 15:25:29,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:29,647 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:29,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1303085071, now seen corresponding path program 1 times [2021-05-02 15:25:29,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:29,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019872059] [2021-05-02 15:25:29,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:29,654 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:29,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543972668] [2021-05-02 15:25:29,654 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 15:25:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:29,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 15:25:29,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:29,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:29,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019872059] [2021-05-02 15:25:29,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:29,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543972668] [2021-05-02 15:25:29,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543972668] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:29,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:29,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 15:25:29,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261696798] [2021-05-02 15:25:29,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 15:25:29,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 15:25:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:29,924 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:30,053 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2021-05-02 15:25:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 15:25:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-02 15:25:30,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:30,054 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:25:30,054 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 15:25:30,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:30,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 15:25:30,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 15:25:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 37 states have internal predecessors, (42), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-02 15:25:30,059 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 36 [2021-05-02 15:25:30,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:30,060 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-02 15:25:30,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:30,060 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-02 15:25:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 15:25:30,060 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:30,060 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1] [2021-05-02 15:25:30,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:30,275 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:30,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:30,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1189074514, now seen corresponding path program 1 times [2021-05-02 15:25:30,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:30,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507077224] [2021-05-02 15:25:30,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:30,284 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:30,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345464863] [2021-05-02 15:25:30,285 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 15:25:30,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:30,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 15:25:30,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:30,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 15:25:30,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507077224] [2021-05-02 15:25:30,398 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:30,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345464863] [2021-05-02 15:25:30,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345464863] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:30,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:30,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 15:25:30,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762073485] [2021-05-02 15:25:30,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 15:25:30,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:30,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 15:25:30,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 15:25:30,401 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:30,430 INFO L93 Difference]: Finished difference Result 74 states and 88 transitions. [2021-05-02 15:25:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:25:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2021-05-02 15:25:30,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:30,431 INFO L225 Difference]: With dead ends: 74 [2021-05-02 15:25:30,431 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 15:25:30,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:30,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 15:25:30,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-02 15:25:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 15:25:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-05-02 15:25:30,437 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 38 [2021-05-02 15:25:30,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:30,437 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-05-02 15:25:30,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 15:25:30,437 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-05-02 15:25:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 15:25:30,437 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:30,438 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 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 15:25:30,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:30,655 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:30,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1861890039, now seen corresponding path program 1 times [2021-05-02 15:25:30,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:30,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957408076] [2021-05-02 15:25:30,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:30,661 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:30,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102442795] [2021-05-02 15:25:30,661 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 15:25:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 15:25:30,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:30,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:25:30,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957408076] [2021-05-02 15:25:30,858 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102442795] [2021-05-02 15:25:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102442795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:30,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:30,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:30,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670720512] [2021-05-02 15:25:30,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:30,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:30,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:30,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:30,859 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 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 15:25:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:31,107 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2021-05-02 15:25:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 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 46 [2021-05-02 15:25:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:31,109 INFO L225 Difference]: With dead ends: 101 [2021-05-02 15:25:31,109 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 15:25:31,110 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 15:25:31,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2021-05-02 15:25:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 54 states have internal predecessors, (62), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:25:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 101 transitions. [2021-05-02 15:25:31,116 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 101 transitions. Word has length 46 [2021-05-02 15:25:31,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:31,116 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 101 transitions. [2021-05-02 15:25:31,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 9 states have internal predecessors, (21), 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 15:25:31,117 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 101 transitions. [2021-05-02 15:25:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:25:31,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:31,117 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1] [2021-05-02 15:25:31,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:31,333 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:31,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash 243046571, now seen corresponding path program 1 times [2021-05-02 15:25:31,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:31,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247708726] [2021-05-02 15:25:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:31,347 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:31,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31048681] [2021-05-02 15:25:31,348 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 15:25:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:31,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:25:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:31,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,528 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 42 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:25:31,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:31,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247708726] [2021-05-02 15:25:31,528 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:31,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31048681] [2021-05-02 15:25:31,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31048681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:31,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:31,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:25:31,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038851404] [2021-05-02 15:25:31,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:31,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:31,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:31,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:31,529 INFO L87 Difference]: Start difference. First operand 84 states and 101 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:25:31,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:31,565 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2021-05-02 15:25:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 15:25:31,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2021-05-02 15:25:31,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:31,567 INFO L225 Difference]: With dead ends: 101 [2021-05-02 15:25:31,567 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 15:25:31,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 15:25:31,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-02 15:25:31,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 60 states have internal predecessors, (67), 21 states have call successors, (21), 13 states have call predecessors, (21), 12 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-02 15:25:31,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-02 15:25:31,573 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 54 [2021-05-02 15:25:31,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:31,574 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-02 15:25:31,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (10), 5 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 15:25:31,574 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-02 15:25:31,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 15:25:31,574 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:31,574 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1] [2021-05-02 15:25:31,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 15:25:31,791 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:31,791 INFO L82 PathProgramCache]: Analyzing trace with hash 244774449, now seen corresponding path program 1 times [2021-05-02 15:25:31,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:31,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370775372] [2021-05-02 15:25:31,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:31,796 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:31,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [626439752] [2021-05-02 15:25:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:25:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:31,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 15:25:31,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:31,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:31,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-02 15:25:32,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:32,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370775372] [2021-05-02 15:25:32,160 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:32,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626439752] [2021-05-02 15:25:32,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626439752] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:32,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:32,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:25:32,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303799270] [2021-05-02 15:25:32,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:25:32,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:25:32,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:25:32,162 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:25:32,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:32,350 INFO L93 Difference]: Finished difference Result 98 states and 111 transitions. [2021-05-02 15:25:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:32,351 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 54 [2021-05-02 15:25:32,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:32,352 INFO L225 Difference]: With dead ends: 98 [2021-05-02 15:25:32,352 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 15:25:32,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:32,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 15:25:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-05-02 15:25:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 18 states have call successors, (18), 14 states have call predecessors, (18), 13 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:25:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2021-05-02 15:25:32,358 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 54 [2021-05-02 15:25:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:32,358 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2021-05-02 15:25:32,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 15:25:32,359 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2021-05-02 15:25:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 15:25:32,360 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:32,360 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:32,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 15:25:32,565 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:32,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:32,566 INFO L82 PathProgramCache]: Analyzing trace with hash -318333104, now seen corresponding path program 2 times [2021-05-02 15:25:32,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:32,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334759201] [2021-05-02 15:25:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:32,573 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:32,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862757460] [2021-05-02 15:25:32,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 15:25:32,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 15:25:32,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:32,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:25:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:32,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-05-02 15:25:32,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334759201] [2021-05-02 15:25:32,706 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:32,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862757460] [2021-05-02 15:25:32,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862757460] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:25:32,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:25:32,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 15:25:32,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412373576] [2021-05-02 15:25:32,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:32,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:32,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:32,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:32,709 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:32,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:32,772 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2021-05-02 15:25:32,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:25:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 56 [2021-05-02 15:25:32,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:32,774 INFO L225 Difference]: With dead ends: 104 [2021-05-02 15:25:32,774 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 15:25:32,775 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:25:32,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 15:25:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 15:25:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 67 states have internal predecessors, (75), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:25:32,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 115 transitions. [2021-05-02 15:25:32,793 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 115 transitions. Word has length 56 [2021-05-02 15:25:32,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:32,793 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 115 transitions. [2021-05-02 15:25:32,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:25:32,794 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 115 transitions. [2021-05-02 15:25:32,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 15:25:32,794 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:32,794 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:33,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:33,009 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:33,009 INFO L82 PathProgramCache]: Analyzing trace with hash 940283669, now seen corresponding path program 1 times [2021-05-02 15:25:33,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:33,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125039814] [2021-05-02 15:25:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:33,014 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:33,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443686681] [2021-05-02 15:25:33,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:25:33,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:33,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 15:25:33,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:33,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,168 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 36 proven. 46 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-05-02 15:25:33,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125039814] [2021-05-02 15:25:33,169 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:33,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443686681] [2021-05-02 15:25:33,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443686681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:33,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:33,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 15:25:33,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512958405] [2021-05-02 15:25:33,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 15:25:33,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:33,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 15:25:33,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 15:25:33,170 INFO L87 Difference]: Start difference. First operand 101 states and 115 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:25:33,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:33,214 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2021-05-02 15:25:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:33,215 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 61 [2021-05-02 15:25:33,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:33,217 INFO L225 Difference]: With dead ends: 128 [2021-05-02 15:25:33,217 INFO L226 Difference]: Without dead ends: 103 [2021-05-02 15:25:33,219 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-05-02 15:25:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-05-02 15:25:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 69 states have internal predecessors, (77), 21 states have call successors, (21), 15 states have call predecessors, (21), 14 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 15:25:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 117 transitions. [2021-05-02 15:25:33,227 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 117 transitions. Word has length 61 [2021-05-02 15:25:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:33,228 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 117 transitions. [2021-05-02 15:25:33,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 15:25:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 117 transitions. [2021-05-02 15:25:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 15:25:33,228 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:33,228 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:33,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:33,437 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:33,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:33,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1995039641, now seen corresponding path program 2 times [2021-05-02 15:25:33,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:33,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441856955] [2021-05-02 15:25:33,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:33,444 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:33,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201265634] [2021-05-02 15:25:33,445 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 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 15:25:33,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:25:33,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:33,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 15:25:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:33,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:33,885 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 43 proven. 34 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 15:25:33,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:33,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441856955] [2021-05-02 15:25:33,885 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:33,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201265634] [2021-05-02 15:25:33,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201265634] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:33,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:33,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 15:25:33,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179830575] [2021-05-02 15:25:33,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 15:25:33,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:33,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 15:25:33,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:33,887 INFO L87 Difference]: Start difference. First operand 103 states and 117 transitions. Second operand has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 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 15:25:34,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:34,256 INFO L93 Difference]: Finished difference Result 163 states and 207 transitions. [2021-05-02 15:25:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:34,257 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 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 64 [2021-05-02 15:25:34,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:34,258 INFO L225 Difference]: With dead ends: 163 [2021-05-02 15:25:34,258 INFO L226 Difference]: Without dead ends: 131 [2021-05-02 15:25:34,258 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:25:34,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-05-02 15:25:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2021-05-02 15:25:34,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.175) internal successors, (94), 83 states have internal predecessors, (94), 28 states have call successors, (28), 17 states have call predecessors, (28), 16 states have return successors, (26), 24 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:25:34,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2021-05-02 15:25:34,265 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 64 [2021-05-02 15:25:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:34,266 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2021-05-02 15:25:34,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 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 15:25:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2021-05-02 15:25:34,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:25:34,266 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:34,266 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:34,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 15:25:34,481 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1140868055, now seen corresponding path program 1 times [2021-05-02 15:25:34,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:34,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852838511] [2021-05-02 15:25:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:34,487 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:34,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987273342] [2021-05-02 15:25:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 15:25:34,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:34,646 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 16 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 15:25:34,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:34,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852838511] [2021-05-02 15:25:34,647 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:34,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987273342] [2021-05-02 15:25:34,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987273342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:34,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:34,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:25:34,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967397012] [2021-05-02 15:25:34,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:25:34,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:34,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:25:34,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:25:34,648 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:34,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:34,715 INFO L93 Difference]: Finished difference Result 151 states and 173 transitions. [2021-05-02 15:25:34,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:25:34,716 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2021-05-02 15:25:34,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:34,717 INFO L225 Difference]: With dead ends: 151 [2021-05-02 15:25:34,717 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 15:25:34,717 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:25:34,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 15:25:34,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 15:25:34,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.1444444444444444) internal successors, (103), 92 states have internal predecessors, (103), 28 states have call successors, (28), 19 states have call predecessors, (28), 18 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-02 15:25:34,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-05-02 15:25:34,724 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 68 [2021-05-02 15:25:34,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:34,724 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-05-02 15:25:34,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 6 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 4 states have call predecessors, (10), 5 states have call successors, (10) [2021-05-02 15:25:34,724 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-05-02 15:25:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 15:25:34,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:34,724 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 15:25:34,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 15:25:34,941 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:34,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:34,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1142595933, now seen corresponding path program 1 times [2021-05-02 15:25:34,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:34,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737559185] [2021-05-02 15:25:34,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:34,946 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:34,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98728113] [2021-05-02 15:25:34,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:34,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:34,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 15:25:34,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:35,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,290 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-05-02 15:25:35,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:35,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737559185] [2021-05-02 15:25:35,290 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:35,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98728113] [2021-05-02 15:25:35,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98728113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:35,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:35,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:25:35,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138711154] [2021-05-02 15:25:35,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:25:35,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:35,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:25:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:25:35,293 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:25:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:35,460 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2021-05-02 15:25:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:25:35,461 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 68 [2021-05-02 15:25:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:35,463 INFO L225 Difference]: With dead ends: 151 [2021-05-02 15:25:35,463 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 15:25:35,463 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 15:25:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 15:25:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2021-05-02 15:25:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 99 states have internal predecessors, (113), 30 states have call successors, (30), 20 states have call predecessors, (30), 19 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:25:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2021-05-02 15:25:35,478 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 68 [2021-05-02 15:25:35,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:35,479 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2021-05-02 15:25:35,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 15:25:35,479 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2021-05-02 15:25:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:25:35,482 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:35,482 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 2, 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, 1, 1, 1, 1] [2021-05-02 15:25:35,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 15:25:35,697 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:35,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1390565976, now seen corresponding path program 2 times [2021-05-02 15:25:35,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:35,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392771773] [2021-05-02 15:25:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:35,706 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:35,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940537693] [2021-05-02 15:25:35,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:35,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:25:35,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:25:35,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 15:25:35,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:35,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:35,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 46 proven. 24 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-05-02 15:25:36,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:25:36,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392771773] [2021-05-02 15:25:36,122 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:25:36,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940537693] [2021-05-02 15:25:36,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940537693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:25:36,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:25:36,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:25:36,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583769636] [2021-05-02 15:25:36,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:25:36,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:25:36,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:25:36,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:25:36,126 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:25:36,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:25:36,374 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2021-05-02 15:25:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:25:36,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) Word has length 73 [2021-05-02 15:25:36,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:25:36,376 INFO L225 Difference]: With dead ends: 174 [2021-05-02 15:25:36,376 INFO L226 Difference]: Without dead ends: 149 [2021-05-02 15:25:36,377 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:25:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-05-02 15:25:36,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2021-05-02 15:25:36,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.134020618556701) internal successors, (110), 100 states have internal predecessors, (110), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-02 15:25:36,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 169 transitions. [2021-05-02 15:25:36,387 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 169 transitions. Word has length 73 [2021-05-02 15:25:36,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:25:36,388 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 169 transitions. [2021-05-02 15:25:36,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 15:25:36,389 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 169 transitions. [2021-05-02 15:25:36,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-02 15:25:36,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:25:36,390 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 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, 1, 1, 1, 1, 1] [2021-05-02 15:25:36,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:25:36,598 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:25:36,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:25:36,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1792978632, now seen corresponding path program 1 times [2021-05-02 15:25:36,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:25:36,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418371898] [2021-05-02 15:25:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:25:36,603 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:25:36,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754731627] [2021-05-02 15:25:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 15:25:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:25:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 15:25:36,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:25:36,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:36,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:37,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:44,493 WARN L205 SmtUtils]: Spent 5.26 s on a formula simplification. DAG size of input: 87 DAG size of output: 83 [2021-05-02 15:25:44,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:44,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:44,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:44,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:44,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:44,929 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-05-02 15:25:45,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:45,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:54,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:55,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:56,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:57,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:58,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:25:59,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:26:31,249 WARN L159 QuantifierPusher]: Ignoring assumption.