/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:28:19,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:28:19,458 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:28:19,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:28:19,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:28:19,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:28:19,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:28:19,513 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:28:19,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:28:19,516 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:28:19,518 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:28:19,523 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:28:19,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:28:19,525 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:28:19,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:28:19,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:28:19,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:28:19,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:28:19,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:28:19,539 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:28:19,540 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 [2021-05-06 02:28:19,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:28:19,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:28:19,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:28:19,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:28:19,595 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:28:19,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:28:19,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:28:19,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:28:19,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:28:19,595 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:28:19,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:28:19,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:28:19,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:28:19,596 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:28:19,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:28:19,597 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:28:19,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:28:19,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:28:19,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:28:19,597 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:28:19,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:28:19,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:28:19,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:28:19,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:28:19,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:28:19,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:28:19,598 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:28:19,598 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:28:19,598 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:28:19,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:28:19,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:28:19,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:28:19,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:28:19,920 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:28:19,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2021-05-06 02:28:19,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947ed48f3/180de8c2d28440e9ae7afe2c6198f224/FLAGd06319fa6 [2021-05-06 02:28:20,336 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:28:20,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c [2021-05-06 02:28:20,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947ed48f3/180de8c2d28440e9ae7afe2c6198f224/FLAGd06319fa6 [2021-05-06 02:28:20,746 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/947ed48f3/180de8c2d28440e9ae7afe2c6198f224 [2021-05-06 02:28:20,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:28:20,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:28:20,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:20,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:28:20,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:28:20,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:20,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1004bf43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20, skipping insertion in model container [2021-05-06 02:28:20,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:20,771 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:28:20,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:28:20,904 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c[489,502] [2021-05-06 02:28:20,929 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:20,935 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:28:20,943 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_unwindbound50.c[489,502] [2021-05-06 02:28:20,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:28:20,974 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:28:20,975 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20 WrapperNode [2021-05-06 02:28:20,975 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:28:20,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:28:20,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:28:20,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:28:21,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:21,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:21,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:21,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:21,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:21,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:21,034 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (1/1) ... [2021-05-06 02:28:21,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:28:21,037 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:28:21,037 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:28:21,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:28:21,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (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 [2021-05-06 02:28:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:28:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:28:21,111 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:28:21,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:28:21,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:28:21,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:28:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:28:21,112 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:28:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:28:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:28:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:28:21,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:28:21,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:28:21,114 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:28:21,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:28:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:28:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:28:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:28:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:28:21,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:28:21,319 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:28:21,324 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 02:28:21,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:21 BoogieIcfgContainer [2021-05-06 02:28:21,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:28:21,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:28:21,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:28:21,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:28:21,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:28:20" (1/3) ... [2021-05-06 02:28:21,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373be005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:21, skipping insertion in model container [2021-05-06 02:28:21,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:28:20" (2/3) ... [2021-05-06 02:28:21,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@373be005 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:28:21, skipping insertion in model container [2021-05-06 02:28:21,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:28:21" (3/3) ... [2021-05-06 02:28:21,331 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound50.c [2021-05-06 02:28:21,335 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:28:21,338 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:28:21,349 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:28:21,364 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:28:21,364 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:28:21,364 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:28:21,364 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:28:21,364 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:28:21,364 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:28:21,364 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:28:21,364 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:28:21,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:28:21,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 02:28:21,409 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:21,409 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:21,409 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:21,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1226702723, now seen corresponding path program 1 times [2021-05-06 02:28:21,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:21,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528991459] [2021-05-06 02:28:21,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:21,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:21,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:28:21,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:21,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:28:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:21,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:28:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:21,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:28:21,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:21,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528991459] [2021-05-06 02:28:21,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528991459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:21,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:21,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:28:21,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778785668] [2021-05-06 02:28:21,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:28:21,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:21,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:28:21,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:21,602 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:28:21,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:21,687 INFO L93 Difference]: Finished difference Result 64 states and 97 transitions. [2021-05-06 02:28:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:28:21,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 02:28:21,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:21,694 INFO L225 Difference]: With dead ends: 64 [2021-05-06 02:28:21,694 INFO L226 Difference]: Without dead ends: 31 [2021-05-06 02:28:21,696 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:28:21,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-06 02:28:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-05-06 02:28:21,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:28:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-06 02:28:21,736 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 22 [2021-05-06 02:28:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:21,736 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-06 02:28:21,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:28:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-06 02:28:21,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:28:21,737 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:21,737 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:21,738 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:28:21,738 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:21,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:21,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1346542817, now seen corresponding path program 1 times [2021-05-06 02:28:21,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:21,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654383388] [2021-05-06 02:28:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:21,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:28:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:21,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:28:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:21,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:28:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:28:21,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:21,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654383388] [2021-05-06 02:28:21,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654383388] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:21,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:21,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:21,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604122427] [2021-05-06 02:28:21,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:21,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:21,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:21,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:21,863 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:28:22,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:22,008 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-05-06 02:28:22,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:28:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-06 02:28:22,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:22,011 INFO L225 Difference]: With dead ends: 42 [2021-05-06 02:28:22,012 INFO L226 Difference]: Without dead ends: 32 [2021-05-06 02:28:22,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-06 02:28:22,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-06 02:28:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 02:28:22,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-06 02:28:22,021 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 23 [2021-05-06 02:28:22,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:22,022 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-06 02:28:22,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 02:28:22,022 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-06 02:28:22,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-06 02:28:22,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:22,022 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:22,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 02:28:22,023 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:22,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1348211113, now seen corresponding path program 1 times [2021-05-06 02:28:22,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:22,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553080416] [2021-05-06 02:28:22,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:22,033 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:22,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2030893421] [2021-05-06 02:28:22,034 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 [2021-05-06 02:28:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:28:22,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:22,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:22,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 02:28:22,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:22,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553080416] [2021-05-06 02:28:22,221 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:22,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030893421] [2021-05-06 02:28:22,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030893421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:22,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:22,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:22,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986982475] [2021-05-06 02:28:22,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:22,228 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:28:22,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:22,283 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-05-06 02:28:22,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:22,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2021-05-06 02:28:22,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:22,286 INFO L225 Difference]: With dead ends: 49 [2021-05-06 02:28:22,286 INFO L226 Difference]: Without dead ends: 47 [2021-05-06 02:28:22,287 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:22,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-06 02:28:22,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-05-06 02:28:22,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:28:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2021-05-06 02:28:22,314 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2021-05-06 02:28:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:22,314 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2021-05-06 02:28:22,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-06 02:28:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2021-05-06 02:28:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 02:28:22,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:22,315 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:22,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 02:28:22,516 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1060153012, now seen corresponding path program 1 times [2021-05-06 02:28:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:22,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072998236] [2021-05-06 02:28:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:22,527 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:22,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1397560992] [2021-05-06 02:28:22,528 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 [2021-05-06 02:28:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:22,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:28:22,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:22,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:22,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:22,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:22,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:22,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-06 02:28:22,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:22,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072998236] [2021-05-06 02:28:22,737 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:22,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397560992] [2021-05-06 02:28:22,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397560992] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:22,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:22,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-06 02:28:22,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341606982] [2021-05-06 02:28:22,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:22,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:22,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:22,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:22,739 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:28:22,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:22,834 INFO L93 Difference]: Finished difference Result 71 states and 104 transitions. [2021-05-06 02:28:22,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:22,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 02:28:22,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:22,836 INFO L225 Difference]: With dead ends: 71 [2021-05-06 02:28:22,837 INFO L226 Difference]: Without dead ends: 69 [2021-05-06 02:28:22,837 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:22,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-06 02:28:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-05-06 02:28:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 23 states have call successors, (23), 6 states have call predecessors, (23), 5 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2021-05-06 02:28:22,846 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 28 [2021-05-06 02:28:22,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:22,846 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2021-05-06 02:28:22,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 02:28:22,846 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2021-05-06 02:28:22,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:28:22,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:22,847 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:23,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:23,061 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:23,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:23,062 INFO L82 PathProgramCache]: Analyzing trace with hash -560761015, now seen corresponding path program 1 times [2021-05-06 02:28:23,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:23,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864328954] [2021-05-06 02:28:23,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:23,086 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:23,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852650459] [2021-05-06 02:28:23,087 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 [2021-05-06 02:28:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:23,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:28:23,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:23,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-06 02:28:23,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:23,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864328954] [2021-05-06 02:28:23,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:23,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852650459] [2021-05-06 02:28:23,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852650459] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:23,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:23,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:23,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173144512] [2021-05-06 02:28:23,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:23,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:23,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:23,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:23,231 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:23,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:23,272 INFO L93 Difference]: Finished difference Result 69 states and 95 transitions. [2021-05-06 02:28:23,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:23,273 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:28:23,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:23,274 INFO L225 Difference]: With dead ends: 69 [2021-05-06 02:28:23,274 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 02:28:23,274 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.2ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 02:28:23,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 02:28:23,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 36 states have (on average 1.3333333333333333) internal successors, (48), 38 states have internal predecessors, (48), 22 states have call successors, (22), 7 states have call predecessors, (22), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-06 02:28:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 89 transitions. [2021-05-06 02:28:23,281 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 89 transitions. Word has length 33 [2021-05-06 02:28:23,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:23,281 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 89 transitions. [2021-05-06 02:28:23,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:28:23,281 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 89 transitions. [2021-05-06 02:28:23,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:28:23,282 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:23,282 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:23,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:23,497 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:23,497 INFO L82 PathProgramCache]: Analyzing trace with hash 201438379, now seen corresponding path program 1 times [2021-05-06 02:28:23,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:23,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756165765] [2021-05-06 02:28:23,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:23,504 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:23,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56078813] [2021-05-06 02:28:23,504 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 [2021-05-06 02:28:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:28:23,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:23,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:28:23,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:23,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756165765] [2021-05-06 02:28:23,615 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:23,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56078813] [2021-05-06 02:28:23,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56078813] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:23,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:23,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:23,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485095491] [2021-05-06 02:28:23,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:23,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:23,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:23,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:23,616 INFO L87 Difference]: Start difference. First operand 65 states and 89 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:28:23,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:23,658 INFO L93 Difference]: Finished difference Result 77 states and 104 transitions. [2021-05-06 02:28:23,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:23,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 39 [2021-05-06 02:28:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:23,662 INFO L225 Difference]: With dead ends: 77 [2021-05-06 02:28:23,662 INFO L226 Difference]: Without dead ends: 75 [2021-05-06 02:28:23,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-05-06 02:28:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-05-06 02:28:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 43 states have internal predecessors, (51), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 02:28:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2021-05-06 02:28:23,683 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 39 [2021-05-06 02:28:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:23,683 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2021-05-06 02:28:23,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-05-06 02:28:23,683 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2021-05-06 02:28:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:28:23,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:23,688 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:23,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:23,905 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:23,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1085077998, now seen corresponding path program 1 times [2021-05-06 02:28:23,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:23,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591002855] [2021-05-06 02:28:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:23,911 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:23,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665512036] [2021-05-06 02:28:23,912 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 [2021-05-06 02:28:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:23,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:28:23,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:24,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:28:24,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:24,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591002855] [2021-05-06 02:28:24,071 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:24,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665512036] [2021-05-06 02:28:24,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665512036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:24,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:24,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-06 02:28:24,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615832005] [2021-05-06 02:28:24,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:24,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:24,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:24,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:24,072 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:28:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:24,116 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2021-05-06 02:28:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:28:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2021-05-06 02:28:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:24,118 INFO L225 Difference]: With dead ends: 111 [2021-05-06 02:28:24,118 INFO L226 Difference]: Without dead ends: 97 [2021-05-06 02:28:24,119 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-05-06 02:28:24,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-05-06 02:28:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 61 states have internal predecessors, (69), 26 states have call successors, (26), 13 states have call predecessors, (26), 11 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-06 02:28:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 117 transitions. [2021-05-06 02:28:24,127 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 117 transitions. Word has length 42 [2021-05-06 02:28:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:24,128 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 117 transitions. [2021-05-06 02:28:24,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:28:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 117 transitions. [2021-05-06 02:28:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-06 02:28:24,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:24,128 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:24,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 02:28:24,346 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:24,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:24,347 INFO L82 PathProgramCache]: Analyzing trace with hash 691597660, now seen corresponding path program 1 times [2021-05-06 02:28:24,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:24,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651141230] [2021-05-06 02:28:24,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:24,353 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:24,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139285383] [2021-05-06 02:28:24,353 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 [2021-05-06 02:28:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:24,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:28:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:24,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:28:24,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:24,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651141230] [2021-05-06 02:28:24,503 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:24,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139285383] [2021-05-06 02:28:24,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139285383] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:28:24,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:28:24,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:28:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001924235] [2021-05-06 02:28:24,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:28:24,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:24,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:28:24,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:28:24,504 INFO L87 Difference]: Start difference. First operand 95 states and 117 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:28:24,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:24,548 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2021-05-06 02:28:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:28:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2021-05-06 02:28:24,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:24,550 INFO L225 Difference]: With dead ends: 106 [2021-05-06 02:28:24,550 INFO L226 Difference]: Without dead ends: 104 [2021-05-06 02:28:24,550 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:24,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-06 02:28:24,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-06 02:28:24,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.2) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 14 states have call predecessors, (30), 12 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2021-05-06 02:28:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 128 transitions. [2021-05-06 02:28:24,558 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 128 transitions. Word has length 42 [2021-05-06 02:28:24,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:24,558 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 128 transitions. [2021-05-06 02:28:24,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:28:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 128 transitions. [2021-05-06 02:28:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 02:28:24,559 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:24,559 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:24,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:24,765 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:24,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1376219446, now seen corresponding path program 1 times [2021-05-06 02:28:24,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:24,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917206270] [2021-05-06 02:28:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:24,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:24,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387243467] [2021-05-06 02:28:24,772 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 [2021-05-06 02:28:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-06 02:28:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:24,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-06 02:28:24,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:24,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917206270] [2021-05-06 02:28:24,927 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:24,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387243467] [2021-05-06 02:28:24,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387243467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:24,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:24,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:24,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328438892] [2021-05-06 02:28:24,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:24,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:24,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:24,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:24,928 INFO L87 Difference]: Start difference. First operand 103 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:28:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:25,097 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2021-05-06 02:28:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 02:28:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:25,100 INFO L225 Difference]: With dead ends: 118 [2021-05-06 02:28:25,100 INFO L226 Difference]: Without dead ends: 106 [2021-05-06 02:28:25,102 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:25,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-06 02:28:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2021-05-06 02:28:25,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.1833333333333333) internal successors, (71), 67 states have internal predecessors, (71), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (28), 23 states have call predecessors, (28), 28 states have call successors, (28) [2021-05-06 02:28:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2021-05-06 02:28:25,121 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 44 [2021-05-06 02:28:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:25,121 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2021-05-06 02:28:25,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:28:25,122 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2021-05-06 02:28:25,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-06 02:28:25,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:25,124 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:25,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:25,341 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:25,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:25,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1137310021, now seen corresponding path program 1 times [2021-05-06 02:28:25,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:25,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487564119] [2021-05-06 02:28:25,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:25,347 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:25,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340997979] [2021-05-06 02:28:25,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-06 02:28:25,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 02:28:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:25,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-06 02:28:25,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:25,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487564119] [2021-05-06 02:28:25,542 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:25,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340997979] [2021-05-06 02:28:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340997979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873873753] [2021-05-06 02:28:25,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:25,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:25,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:25,543 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:28:25,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:25,685 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2021-05-06 02:28:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:25,685 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 47 [2021-05-06 02:28:25,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:25,686 INFO L225 Difference]: With dead ends: 131 [2021-05-06 02:28:25,686 INFO L226 Difference]: Without dead ends: 129 [2021-05-06 02:28:25,686 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-05-06 02:28:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-05-06 02:28:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 79 states have internal predecessors, (87), 37 states have call successors, (37), 15 states have call predecessors, (37), 14 states have return successors, (34), 29 states have call predecessors, (34), 34 states have call successors, (34) [2021-05-06 02:28:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2021-05-06 02:28:25,695 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 47 [2021-05-06 02:28:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:25,695 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2021-05-06 02:28:25,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:28:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2021-05-06 02:28:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-06 02:28:25,696 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:25,696 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:25,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 02:28:25,916 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:25,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:25,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1475439812, now seen corresponding path program 2 times [2021-05-06 02:28:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:25,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580435955] [2021-05-06 02:28:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:25,922 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:25,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732309882] [2021-05-06 02:28:25,922 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 [2021-05-06 02:28:25,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:25,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:25,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:28:25,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:26,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,102 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-06 02:28:26,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:26,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580435955] [2021-05-06 02:28:26,102 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:26,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732309882] [2021-05-06 02:28:26,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732309882] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:26,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:26,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:26,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847586436] [2021-05-06 02:28:26,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:26,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:26,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:26,104 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:28:26,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:26,239 INFO L93 Difference]: Finished difference Result 151 states and 203 transitions. [2021-05-06 02:28:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:26,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 52 [2021-05-06 02:28:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:26,241 INFO L225 Difference]: With dead ends: 151 [2021-05-06 02:28:26,241 INFO L226 Difference]: Without dead ends: 145 [2021-05-06 02:28:26,241 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 46.2ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:26,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-05-06 02:28:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-05-06 02:28:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 81 states have (on average 1.2345679012345678) internal successors, (100), 90 states have internal predecessors, (100), 48 states have call successors, (48), 16 states have call predecessors, (48), 15 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:28:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 192 transitions. [2021-05-06 02:28:26,253 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 192 transitions. Word has length 52 [2021-05-06 02:28:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:26,253 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 192 transitions. [2021-05-06 02:28:26,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:28:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 192 transitions. [2021-05-06 02:28:26,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:28:26,254 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:26,254 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:26,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:26,469 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash 220857665, now seen corresponding path program 2 times [2021-05-06 02:28:26,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:26,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897537623] [2021-05-06 02:28:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:26,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:26,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [593379005] [2021-05-06 02:28:26,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:26,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:26,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:28:26,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:26,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 12 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-06 02:28:26,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:26,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897537623] [2021-05-06 02:28:26,632 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:26,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593379005] [2021-05-06 02:28:26,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593379005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:26,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:26,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:28:26,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745840915] [2021-05-06 02:28:26,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:28:26,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:26,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:28:26,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:26,634 INFO L87 Difference]: Start difference. First operand 145 states and 192 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:28:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:26,682 INFO L93 Difference]: Finished difference Result 199 states and 251 transitions. [2021-05-06 02:28:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:26,682 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 02:28:26,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:26,683 INFO L225 Difference]: With dead ends: 199 [2021-05-06 02:28:26,683 INFO L226 Difference]: Without dead ends: 173 [2021-05-06 02:28:26,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:26,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-05-06 02:28:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2021-05-06 02:28:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 104 states have (on average 1.1826923076923077) internal successors, (123), 113 states have internal predecessors, (123), 48 states have call successors, (48), 21 states have call predecessors, (48), 20 states have return successors, (44), 38 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:28:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 215 transitions. [2021-05-06 02:28:26,694 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 215 transitions. Word has length 61 [2021-05-06 02:28:26,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:26,694 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 215 transitions. [2021-05-06 02:28:26,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:28:26,694 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 215 transitions. [2021-05-06 02:28:26,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:28:26,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:26,695 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:26,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:26,915 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1997533323, now seen corresponding path program 1 times [2021-05-06 02:28:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:26,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027688575] [2021-05-06 02:28:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:26,921 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:26,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1091715098] [2021-05-06 02:28:26,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:26,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:26,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:27,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:28:27,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027688575] [2021-05-06 02:28:27,117 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:27,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091715098] [2021-05-06 02:28:27,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091715098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:27,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:27,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:27,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652968633] [2021-05-06 02:28:27,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:27,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:27,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:27,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:27,118 INFO L87 Difference]: Start difference. First operand 173 states and 215 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:27,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:27,211 INFO L93 Difference]: Finished difference Result 188 states and 237 transitions. [2021-05-06 02:28:27,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:28:27,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:27,213 INFO L225 Difference]: With dead ends: 188 [2021-05-06 02:28:27,213 INFO L226 Difference]: Without dead ends: 186 [2021-05-06 02:28:27,213 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-06 02:28:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-05-06 02:28:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 108 states have (on average 1.1851851851851851) internal successors, (128), 118 states have internal predecessors, (128), 54 states have call successors, (54), 22 states have call predecessors, (54), 21 states have return successors, (50), 43 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:28:27,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2021-05-06 02:28:27,230 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 61 [2021-05-06 02:28:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:27,230 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2021-05-06 02:28:27,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:27,230 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2021-05-06 02:28:27,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:28:27,231 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:27,231 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:27,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:28:27,444 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:27,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:27,444 INFO L82 PathProgramCache]: Analyzing trace with hash 284565575, now seen corresponding path program 2 times [2021-05-06 02:28:27,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:27,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754500649] [2021-05-06 02:28:27,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:27,449 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:27,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205955427] [2021-05-06 02:28:27,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:27,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:27,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:28:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:27,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-05-06 02:28:27,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754500649] [2021-05-06 02:28:27,629 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:27,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205955427] [2021-05-06 02:28:27,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205955427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:27,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:27,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:27,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256252413] [2021-05-06 02:28:27,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:27,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:27,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:27,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:27,630 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:27,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:27,711 INFO L93 Difference]: Finished difference Result 198 states and 252 transitions. [2021-05-06 02:28:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:27,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 61 [2021-05-06 02:28:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:27,712 INFO L225 Difference]: With dead ends: 198 [2021-05-06 02:28:27,712 INFO L226 Difference]: Without dead ends: 193 [2021-05-06 02:28:27,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-05-06 02:28:27,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2021-05-06 02:28:27,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 112 states have (on average 1.1785714285714286) internal successors, (132), 122 states have internal predecessors, (132), 57 states have call successors, (57), 23 states have call predecessors, (57), 22 states have return successors, (53), 46 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:28:27,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 242 transitions. [2021-05-06 02:28:27,723 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 242 transitions. Word has length 61 [2021-05-06 02:28:27,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:27,723 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 242 transitions. [2021-05-06 02:28:27,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:28:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 242 transitions. [2021-05-06 02:28:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:28:27,724 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:27,724 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:27,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:28:27,937 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash 404368620, now seen corresponding path program 2 times [2021-05-06 02:28:27,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:27,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513254374] [2021-05-06 02:28:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:27,942 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:27,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1350152318] [2021-05-06 02:28:27,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:27,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:27,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:28:27,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:28,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-06 02:28:28,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:28,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513254374] [2021-05-06 02:28:28,210 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:28,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350152318] [2021-05-06 02:28:28,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350152318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:28,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:28,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 02:28:28,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864710324] [2021-05-06 02:28:28,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 02:28:28,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:28,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 02:28:28,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:28,212 INFO L87 Difference]: Start difference. First operand 192 states and 242 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:28,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:28,421 INFO L93 Difference]: Finished difference Result 219 states and 281 transitions. [2021-05-06 02:28:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:28:28,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:28:28,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:28,423 INFO L225 Difference]: With dead ends: 219 [2021-05-06 02:28:28,423 INFO L226 Difference]: Without dead ends: 217 [2021-05-06 02:28:28,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:28:28,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-05-06 02:28:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 212. [2021-05-06 02:28:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 134 states have internal predecessors, (148), 63 states have call successors, (63), 25 states have call predecessors, (63), 24 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:28:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 270 transitions. [2021-05-06 02:28:28,435 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 270 transitions. Word has length 66 [2021-05-06 02:28:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:28,435 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 270 transitions. [2021-05-06 02:28:28,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 270 transitions. [2021-05-06 02:28:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:28:28,436 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:28,436 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:28,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 02:28:28,649 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:28,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:28,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1105968494, now seen corresponding path program 3 times [2021-05-06 02:28:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:28,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641102200] [2021-05-06 02:28:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:28,654 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:28,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309183991] [2021-05-06 02:28:28,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:28,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:28,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-06 02:28:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:28,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-06 02:28:28,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:28,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641102200] [2021-05-06 02:28:28,892 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:28,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309183991] [2021-05-06 02:28:28,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309183991] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:28,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:28,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:28:28,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21174811] [2021-05-06 02:28:28,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:28:28,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:28,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:28:28,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:28:28,893 INFO L87 Difference]: Start difference. First operand 212 states and 270 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:29,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:29,004 INFO L93 Difference]: Finished difference Result 235 states and 302 transitions. [2021-05-06 02:28:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:28:29,005 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 66 [2021-05-06 02:28:29,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:29,006 INFO L225 Difference]: With dead ends: 235 [2021-05-06 02:28:29,006 INFO L226 Difference]: Without dead ends: 233 [2021-05-06 02:28:29,006 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-05-06 02:28:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 217. [2021-05-06 02:28:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 128 states have (on average 1.1953125) internal successors, (153), 138 states have internal predecessors, (153), 63 states have call successors, (63), 26 states have call predecessors, (63), 25 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:28:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 275 transitions. [2021-05-06 02:28:29,021 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 275 transitions. Word has length 66 [2021-05-06 02:28:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:29,022 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 275 transitions. [2021-05-06 02:28:29,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 02:28:29,022 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 275 transitions. [2021-05-06 02:28:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:28:29,023 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:29,023 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:29,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:29,233 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:29,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1181721515, now seen corresponding path program 4 times [2021-05-06 02:28:29,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:29,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762118146] [2021-05-06 02:28:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:29,238 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:29,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425080792] [2021-05-06 02:28:29,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:29,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:29,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:29,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:28:29,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:29,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 43 proven. 35 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-05-06 02:28:29,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:29,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762118146] [2021-05-06 02:28:29,544 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:29,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425080792] [2021-05-06 02:28:29,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425080792] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:29,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:29,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:29,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815374224] [2021-05-06 02:28:29,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:29,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:29,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:29,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:29,545 INFO L87 Difference]: Start difference. First operand 217 states and 275 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:28:29,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:29,792 INFO L93 Difference]: Finished difference Result 242 states and 310 transitions. [2021-05-06 02:28:29,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:29,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 02:28:29,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:29,793 INFO L225 Difference]: With dead ends: 242 [2021-05-06 02:28:29,793 INFO L226 Difference]: Without dead ends: 235 [2021-05-06 02:28:29,794 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-05-06 02:28:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 193. [2021-05-06 02:28:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 115 states have (on average 1.182608695652174) internal successors, (136), 124 states have internal predecessors, (136), 54 states have call successors, (54), 24 states have call predecessors, (54), 23 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2021-05-06 02:28:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 240 transitions. [2021-05-06 02:28:29,805 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 240 transitions. Word has length 71 [2021-05-06 02:28:29,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:29,805 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 240 transitions. [2021-05-06 02:28:29,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:28:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 240 transitions. [2021-05-06 02:28:29,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-06 02:28:29,806 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:29,806 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:30,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-06 02:28:30,015 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:30,015 INFO L82 PathProgramCache]: Analyzing trace with hash 787354729, now seen corresponding path program 3 times [2021-05-06 02:28:30,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:30,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37167237] [2021-05-06 02:28:30,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:30,020 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:30,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [646881846] [2021-05-06 02:28:30,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:30,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:28:30,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:30,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-05-06 02:28:30,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:30,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37167237] [2021-05-06 02:28:30,231 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:30,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646881846] [2021-05-06 02:28:30,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646881846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:30,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:30,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:30,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250255667] [2021-05-06 02:28:30,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:30,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:30,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:30,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:30,233 INFO L87 Difference]: Start difference. First operand 193 states and 240 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:28:30,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:30,491 INFO L93 Difference]: Finished difference Result 229 states and 292 transitions. [2021-05-06 02:28:30,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:30,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 71 [2021-05-06 02:28:30,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:30,493 INFO L225 Difference]: With dead ends: 229 [2021-05-06 02:28:30,493 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:28:30,493 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:28:30,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2021-05-06 02:28:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 130 states have (on average 1.1923076923076923) internal successors, (155), 139 states have internal predecessors, (155), 60 states have call successors, (60), 27 states have call predecessors, (60), 26 states have return successors, (56), 50 states have call predecessors, (56), 56 states have call successors, (56) [2021-05-06 02:28:30,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2021-05-06 02:28:30,505 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 271 transitions. Word has length 71 [2021-05-06 02:28:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:30,507 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 271 transitions. [2021-05-06 02:28:30,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 02:28:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 271 transitions. [2021-05-06 02:28:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:28:30,508 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:30,508 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:30,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-06 02:28:30,730 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:30,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:30,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1898774094, now seen corresponding path program 3 times [2021-05-06 02:28:30,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:30,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075542014] [2021-05-06 02:28:30,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:30,740 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:30,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204179585] [2021-05-06 02:28:30,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:30,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:28:30,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:30,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:28:30,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:30,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:30,923 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 18 proven. 135 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 02:28:30,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:30,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075542014] [2021-05-06 02:28:30,923 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:30,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204179585] [2021-05-06 02:28:30,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204179585] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:30,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:30,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:30,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31684247] [2021-05-06 02:28:30,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:30,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:30,925 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:31,002 INFO L93 Difference]: Finished difference Result 269 states and 330 transitions. [2021-05-06 02:28:31,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:31,002 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) Word has length 80 [2021-05-06 02:28:31,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:31,003 INFO L225 Difference]: With dead ends: 269 [2021-05-06 02:28:31,004 INFO L226 Difference]: Without dead ends: 243 [2021-05-06 02:28:31,004 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-05-06 02:28:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 230. [2021-05-06 02:28:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 143 states have (on average 1.1538461538461537) internal successors, (165), 152 states have internal predecessors, (165), 57 states have call successors, (57), 30 states have call predecessors, (57), 29 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2021-05-06 02:28:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 275 transitions. [2021-05-06 02:28:31,016 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 275 transitions. Word has length 80 [2021-05-06 02:28:31,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:31,017 INFO L480 AbstractCegarLoop]: Abstraction has 230 states and 275 transitions. [2021-05-06 02:28:31,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 4 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:28:31,017 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 275 transitions. [2021-05-06 02:28:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:28:31,017 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:31,017 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:31,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:31,238 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:31,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:31,238 INFO L82 PathProgramCache]: Analyzing trace with hash -122098436, now seen corresponding path program 5 times [2021-05-06 02:28:31,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:31,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916870310] [2021-05-06 02:28:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:31,243 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:31,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818511874] [2021-05-06 02:28:31,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:31,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:28:31,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:28:31,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:31,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-06 02:28:31,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:31,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916870310] [2021-05-06 02:28:31,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:31,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818511874] [2021-05-06 02:28:31,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818511874] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:31,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:31,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:28:31,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149969964] [2021-05-06 02:28:31,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:28:31,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:31,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:28:31,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:28:31,739 INFO L87 Difference]: Start difference. First operand 230 states and 275 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:28:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:31,807 INFO L93 Difference]: Finished difference Result 266 states and 328 transitions. [2021-05-06 02:28:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:28:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 80 [2021-05-06 02:28:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:31,808 INFO L225 Difference]: With dead ends: 266 [2021-05-06 02:28:31,808 INFO L226 Difference]: Without dead ends: 264 [2021-05-06 02:28:31,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-06 02:28:31,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 250. [2021-05-06 02:28:31,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 163 states have internal predecessors, (177), 67 states have call successors, (67), 31 states have call predecessors, (67), 30 states have return successors, (63), 55 states have call predecessors, (63), 63 states have call successors, (63) [2021-05-06 02:28:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 307 transitions. [2021-05-06 02:28:31,835 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 307 transitions. Word has length 80 [2021-05-06 02:28:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:31,835 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 307 transitions. [2021-05-06 02:28:31,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-06 02:28:31,836 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 307 transitions. [2021-05-06 02:28:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-06 02:28:31,836 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:31,836 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:32,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,045 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:32,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:32,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1835066184, now seen corresponding path program 6 times [2021-05-06 02:28:32,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:32,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938258867] [2021-05-06 02:28:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:32,057 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:32,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012097065] [2021-05-06 02:28:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-06 02:28:32,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:32,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:28:32,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,263 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 52 proven. 7 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-05-06 02:28:32,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:32,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938258867] [2021-05-06 02:28:32,263 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:32,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012097065] [2021-05-06 02:28:32,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012097065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:32,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:32,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:28:32,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705457793] [2021-05-06 02:28:32,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:28:32,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:28:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:28:32,265 INFO L87 Difference]: Start difference. First operand 250 states and 307 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:28:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:32,332 INFO L93 Difference]: Finished difference Result 256 states and 312 transitions. [2021-05-06 02:28:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:28:32,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 80 [2021-05-06 02:28:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:32,334 INFO L225 Difference]: With dead ends: 256 [2021-05-06 02:28:32,334 INFO L226 Difference]: Without dead ends: 251 [2021-05-06 02:28:32,335 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-06 02:28:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2021-05-06 02:28:32,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 164 states have internal predecessors, (179), 62 states have call successors, (62), 32 states have call predecessors, (62), 31 states have return successors, (59), 52 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-06 02:28:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 300 transitions. [2021-05-06 02:28:32,348 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 300 transitions. Word has length 80 [2021-05-06 02:28:32,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:32,348 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 300 transitions. [2021-05-06 02:28:32,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:28:32,349 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 300 transitions. [2021-05-06 02:28:32,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:28:32,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:32,349 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:32,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,561 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:32,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:32,561 INFO L82 PathProgramCache]: Analyzing trace with hash 629296923, now seen corresponding path program 3 times [2021-05-06 02:28:32,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:32,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469503904] [2021-05-06 02:28:32,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:32,566 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:32,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583556152] [2021-05-06 02:28:32,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:32,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:28:32,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:32,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:28:32,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:32,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:28:32,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:32,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469503904] [2021-05-06 02:28:32,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:32,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583556152] [2021-05-06 02:28:32,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583556152] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:32,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:32,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:32,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502781751] [2021-05-06 02:28:32,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:32,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:32,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:32,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:32,806 INFO L87 Difference]: Start difference. First operand 249 states and 300 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:28:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:33,161 INFO L93 Difference]: Finished difference Result 286 states and 358 transitions. [2021-05-06 02:28:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:28:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:33,164 INFO L225 Difference]: With dead ends: 286 [2021-05-06 02:28:33,164 INFO L226 Difference]: Without dead ends: 284 [2021-05-06 02:28:33,164 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.2ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-06 02:28:33,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2021-05-06 02:28:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 162 states have (on average 1.1604938271604939) internal successors, (188), 171 states have internal predecessors, (188), 65 states have call successors, (65), 33 states have call predecessors, (65), 32 states have return successors, (62), 55 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:28:33,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 315 transitions. [2021-05-06 02:28:33,177 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 315 transitions. Word has length 85 [2021-05-06 02:28:33,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:33,177 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 315 transitions. [2021-05-06 02:28:33,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:28:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 315 transitions. [2021-05-06 02:28:33,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:28:33,179 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:33,179 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:33,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-06 02:28:33,389 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:33,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1330896797, now seen corresponding path program 7 times [2021-05-06 02:28:33,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:33,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378409795] [2021-05-06 02:28:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:33,398 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:33,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151366079] [2021-05-06 02:28:33,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:28:33,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-06 02:28:33,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:33,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:33,739 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 02:28:33,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:33,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378409795] [2021-05-06 02:28:33,739 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:33,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151366079] [2021-05-06 02:28:33,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151366079] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:33,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:33,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:33,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323666704] [2021-05-06 02:28:33,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:33,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:33,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:33,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:33,740 INFO L87 Difference]: Start difference. First operand 260 states and 315 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:28:34,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:34,334 INFO L93 Difference]: Finished difference Result 308 states and 376 transitions. [2021-05-06 02:28:34,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:28:34,334 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:28:34,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:34,335 INFO L225 Difference]: With dead ends: 308 [2021-05-06 02:28:34,335 INFO L226 Difference]: Without dead ends: 306 [2021-05-06 02:28:34,336 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:34,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-05-06 02:28:34,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 301. [2021-05-06 02:28:34,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 189 states have (on average 1.164021164021164) internal successors, (220), 198 states have internal predecessors, (220), 74 states have call successors, (74), 38 states have call predecessors, (74), 37 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2021-05-06 02:28:34,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 365 transitions. [2021-05-06 02:28:34,349 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 365 transitions. Word has length 85 [2021-05-06 02:28:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:34,350 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 365 transitions. [2021-05-06 02:28:34,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:28:34,350 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 365 transitions. [2021-05-06 02:28:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:28:34,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:34,350 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:34,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-06 02:28:34,565 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash 148216665, now seen corresponding path program 8 times [2021-05-06 02:28:34,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:34,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966513066] [2021-05-06 02:28:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:34,572 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:34,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476637868] [2021-05-06 02:28:34,572 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:34,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:28:34,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:34,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-06 02:28:34,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:34,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-05-06 02:28:34,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:34,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966513066] [2021-05-06 02:28:34,853 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:34,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476637868] [2021-05-06 02:28:34,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476637868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:34,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:34,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:34,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12178368] [2021-05-06 02:28:34,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:34,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:34,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:34,854 INFO L87 Difference]: Start difference. First operand 301 states and 365 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:28:35,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:35,269 INFO L93 Difference]: Finished difference Result 330 states and 406 transitions. [2021-05-06 02:28:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:35,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 85 [2021-05-06 02:28:35,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:35,270 INFO L225 Difference]: With dead ends: 330 [2021-05-06 02:28:35,270 INFO L226 Difference]: Without dead ends: 328 [2021-05-06 02:28:35,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:28:35,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-05-06 02:28:35,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 282. [2021-05-06 02:28:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 176 states have (on average 1.1704545454545454) internal successors, (206), 185 states have internal predecessors, (206), 71 states have call successors, (71), 35 states have call predecessors, (71), 34 states have return successors, (68), 61 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-06 02:28:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 345 transitions. [2021-05-06 02:28:35,285 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 345 transitions. Word has length 85 [2021-05-06 02:28:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:35,285 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 345 transitions. [2021-05-06 02:28:35,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2021-05-06 02:28:35,286 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 345 transitions. [2021-05-06 02:28:35,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-06 02:28:35,286 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:35,286 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:35,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:35,501 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:35,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:35,501 INFO L82 PathProgramCache]: Analyzing trace with hash 849816539, now seen corresponding path program 9 times [2021-05-06 02:28:35,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:35,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224500939] [2021-05-06 02:28:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:35,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:35,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734114655] [2021-05-06 02:28:35,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:35,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:28:35,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:35,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-06 02:28:35,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:35,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 70 proven. 14 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 02:28:35,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:35,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224500939] [2021-05-06 02:28:35,733 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:35,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734114655] [2021-05-06 02:28:35,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734114655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:35,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:35,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:28:35,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135196164] [2021-05-06 02:28:35,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:28:35,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:28:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:35,735 INFO L87 Difference]: Start difference. First operand 282 states and 345 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:28:36,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:36,082 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2021-05-06 02:28:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:28:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 85 [2021-05-06 02:28:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:36,084 INFO L225 Difference]: With dead ends: 346 [2021-05-06 02:28:36,084 INFO L226 Difference]: Without dead ends: 340 [2021-05-06 02:28:36,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:28:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-06 02:28:36,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 298. [2021-05-06 02:28:36,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 185 states have (on average 1.1675675675675676) internal successors, (216), 195 states have internal predecessors, (216), 76 states have call successors, (76), 37 states have call predecessors, (76), 36 states have return successors, (72), 65 states have call predecessors, (72), 72 states have call successors, (72) [2021-05-06 02:28:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 364 transitions. [2021-05-06 02:28:36,106 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 364 transitions. Word has length 85 [2021-05-06 02:28:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:36,107 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 364 transitions. [2021-05-06 02:28:36,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 02:28:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 364 transitions. [2021-05-06 02:28:36,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:28:36,109 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:36,109 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:36,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:28:36,325 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1358919972, now seen corresponding path program 10 times [2021-05-06 02:28:36,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:36,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912365455] [2021-05-06 02:28:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:36,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:36,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092282460] [2021-05-06 02:28:36,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:36,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:28:36,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:36,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:28:36,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:36,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:28:36,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:36,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912365455] [2021-05-06 02:28:36,599 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:36,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092282460] [2021-05-06 02:28:36,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092282460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:36,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:36,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:36,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392941913] [2021-05-06 02:28:36,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:36,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:36,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:36,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:36,601 INFO L87 Difference]: Start difference. First operand 298 states and 364 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:28:36,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:36,815 INFO L93 Difference]: Finished difference Result 325 states and 409 transitions. [2021-05-06 02:28:36,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:28:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:36,822 INFO L225 Difference]: With dead ends: 325 [2021-05-06 02:28:36,822 INFO L226 Difference]: Without dead ends: 316 [2021-05-06 02:28:36,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:36,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-05-06 02:28:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 314. [2021-05-06 02:28:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 194 states have (on average 1.175257731958763) internal successors, (228), 204 states have internal predecessors, (228), 82 states have call successors, (82), 38 states have call predecessors, (82), 37 states have return successors, (78), 71 states have call predecessors, (78), 78 states have call successors, (78) [2021-05-06 02:28:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 388 transitions. [2021-05-06 02:28:36,843 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 388 transitions. Word has length 90 [2021-05-06 02:28:36,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:36,843 INFO L480 AbstractCegarLoop]: Abstraction has 314 states and 388 transitions. [2021-05-06 02:28:36,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:28:36,843 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 388 transitions. [2021-05-06 02:28:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:28:36,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:36,844 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:37,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:37,058 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:37,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1753286758, now seen corresponding path program 11 times [2021-05-06 02:28:37,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:37,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466133499] [2021-05-06 02:28:37,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:37,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:37,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1857135058] [2021-05-06 02:28:37,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:38,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:28:38,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:38,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-06 02:28:38,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2021-05-06 02:28:38,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:38,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466133499] [2021-05-06 02:28:38,361 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857135058] [2021-05-06 02:28:38,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857135058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:38,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:38,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:28:38,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681385424] [2021-05-06 02:28:38,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:28:38,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:38,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:28:38,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:28:38,362 INFO L87 Difference]: Start difference. First operand 314 states and 388 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:28:38,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:28:38,837 INFO L93 Difference]: Finished difference Result 359 states and 449 transitions. [2021-05-06 02:28:38,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:28:38,837 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 90 [2021-05-06 02:28:38,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:28:38,839 INFO L225 Difference]: With dead ends: 359 [2021-05-06 02:28:38,839 INFO L226 Difference]: Without dead ends: 353 [2021-05-06 02:28:38,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:28:38,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-06 02:28:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 337. [2021-05-06 02:28:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 209 states have (on average 1.167464114832536) internal successors, (244), 220 states have internal predecessors, (244), 87 states have call successors, (87), 41 states have call predecessors, (87), 40 states have return successors, (83), 75 states have call predecessors, (83), 83 states have call successors, (83) [2021-05-06 02:28:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 414 transitions. [2021-05-06 02:28:38,858 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 414 transitions. Word has length 90 [2021-05-06 02:28:38,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:28:38,858 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 414 transitions. [2021-05-06 02:28:38,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-06 02:28:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 414 transitions. [2021-05-06 02:28:38,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-06 02:28:38,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:28:38,859 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:28:39,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:28:39,065 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:28:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:28:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash 27865438, now seen corresponding path program 12 times [2021-05-06 02:28:39,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:28:39,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079265951] [2021-05-06 02:28:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:28:39,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:28:39,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1938777777] [2021-05-06 02:28:39,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:28:39,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:28:39,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:28:39,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:28:39,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:28:39,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:39,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,873 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 29 [2021-05-06 02:28:52,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:28:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 67 proven. 56 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2021-05-06 02:28:52,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:28:52,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079265951] [2021-05-06 02:28:52,918 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:28:52,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938777777] [2021-05-06 02:28:52,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938777777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:28:52,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:28:52,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:28:52,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628034205] [2021-05-06 02:28:52,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:28:52,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:28:52,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:28:52,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:28:52,919 INFO L87 Difference]: Start difference. First operand 337 states and 414 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:29:48,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:48,850 INFO L93 Difference]: Finished difference Result 401 states and 512 transitions. [2021-05-06 02:29:48,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:48,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 90 [2021-05-06 02:29:48,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:48,852 INFO L225 Difference]: With dead ends: 401 [2021-05-06 02:29:48,852 INFO L226 Difference]: Without dead ends: 383 [2021-05-06 02:29:48,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 13655.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:48,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-06 02:29:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 374. [2021-05-06 02:29:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 234 states have (on average 1.1837606837606838) internal successors, (277), 243 states have internal predecessors, (277), 97 states have call successors, (97), 43 states have call predecessors, (97), 42 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:29:48,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 467 transitions. [2021-05-06 02:29:48,880 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 467 transitions. Word has length 90 [2021-05-06 02:29:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:48,880 INFO L480 AbstractCegarLoop]: Abstraction has 374 states and 467 transitions. [2021-05-06 02:29:48,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 02:29:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 467 transitions. [2021-05-06 02:29:48,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-05-06 02:29:48,881 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:48,881 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:49,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:29:49,097 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1449122399, now seen corresponding path program 4 times [2021-05-06 02:29:49,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:49,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444854151] [2021-05-06 02:29:49,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:49,103 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:49,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742032591] [2021-05-06 02:29:49,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:49,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:29:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:29:49,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:49,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 24 proven. 266 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:29:49,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:49,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444854151] [2021-05-06 02:29:49,297 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:49,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742032591] [2021-05-06 02:29:49,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742032591] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:49,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:49,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:29:49,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11648284] [2021-05-06 02:29:49,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:29:49,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:49,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:29:49,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:29:49,298 INFO L87 Difference]: Start difference. First operand 374 states and 467 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:29:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:49,397 INFO L93 Difference]: Finished difference Result 490 states and 592 transitions. [2021-05-06 02:29:49,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 02:29:49,398 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 99 [2021-05-06 02:29:49,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:49,400 INFO L225 Difference]: With dead ends: 490 [2021-05-06 02:29:49,400 INFO L226 Difference]: Without dead ends: 460 [2021-05-06 02:29:49,401 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:29:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-05-06 02:29:49,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 432. [2021-05-06 02:29:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 280 states have (on average 1.1392857142857142) internal successors, (319), 290 states have internal predecessors, (319), 97 states have call successors, (97), 55 states have call predecessors, (97), 54 states have return successors, (93), 86 states have call predecessors, (93), 93 states have call successors, (93) [2021-05-06 02:29:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 509 transitions. [2021-05-06 02:29:49,426 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 509 transitions. Word has length 99 [2021-05-06 02:29:49,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:49,427 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 509 transitions. [2021-05-06 02:29:49,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (17), 7 states have call predecessors, (17), 5 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 02:29:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 509 transitions. [2021-05-06 02:29:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:29:49,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:49,428 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:49,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:29:49,641 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:49,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:49,641 INFO L82 PathProgramCache]: Analyzing trace with hash 340347020, now seen corresponding path program 4 times [2021-05-06 02:29:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:49,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657420575] [2021-05-06 02:29:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:49,646 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:49,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548526274] [2021-05-06 02:29:49,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:49,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:29:49,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 02:29:49,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:49,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:49,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 77 proven. 97 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-06 02:29:50,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:50,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657420575] [2021-05-06 02:29:50,196 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:50,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548526274] [2021-05-06 02:29:50,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548526274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:50,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:50,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:29:50,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431953260] [2021-05-06 02:29:50,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:29:50,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:50,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:29:50,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:50,197 INFO L87 Difference]: Start difference. First operand 432 states and 509 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:29:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:50,949 INFO L93 Difference]: Finished difference Result 469 states and 567 transitions. [2021-05-06 02:29:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:29:50,950 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 02:29:50,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:50,951 INFO L225 Difference]: With dead ends: 469 [2021-05-06 02:29:50,951 INFO L226 Difference]: Without dead ends: 467 [2021-05-06 02:29:50,952 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 199.3ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:29:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-05-06 02:29:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 443. [2021-05-06 02:29:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 287 states have (on average 1.1428571428571428) internal successors, (328), 297 states have internal predecessors, (328), 100 states have call successors, (100), 56 states have call predecessors, (100), 55 states have return successors, (96), 89 states have call predecessors, (96), 96 states have call successors, (96) [2021-05-06 02:29:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 524 transitions. [2021-05-06 02:29:50,977 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 524 transitions. Word has length 104 [2021-05-06 02:29:50,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:50,977 INFO L480 AbstractCegarLoop]: Abstraction has 443 states and 524 transitions. [2021-05-06 02:29:50,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:29:50,977 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 524 transitions. [2021-05-06 02:29:50,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:29:50,978 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:50,978 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:51,192 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:51,193 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:51,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:51,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1041946894, now seen corresponding path program 13 times [2021-05-06 02:29:51,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:51,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600098654] [2021-05-06 02:29:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:51,199 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:51,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061132255] [2021-05-06 02:29:51,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:29:51,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-06 02:29:51,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:51,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 26 proven. 58 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-05-06 02:29:51,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:51,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600098654] [2021-05-06 02:29:51,555 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:51,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061132255] [2021-05-06 02:29:51,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061132255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:51,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:51,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:29:51,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252216620] [2021-05-06 02:29:51,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:29:51,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:29:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:29:51,557 INFO L87 Difference]: Start difference. First operand 443 states and 524 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:51,899 INFO L93 Difference]: Finished difference Result 472 states and 565 transitions. [2021-05-06 02:29:51,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:29:51,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:29:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:51,901 INFO L225 Difference]: With dead ends: 472 [2021-05-06 02:29:51,901 INFO L226 Difference]: Without dead ends: 470 [2021-05-06 02:29:51,902 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:51,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-05-06 02:29:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 454. [2021-05-06 02:29:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 294 states have (on average 1.1428571428571428) internal successors, (336), 304 states have internal predecessors, (336), 103 states have call successors, (103), 57 states have call predecessors, (103), 56 states have return successors, (99), 92 states have call predecessors, (99), 99 states have call successors, (99) [2021-05-06 02:29:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2021-05-06 02:29:51,929 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 104 [2021-05-06 02:29:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:51,929 INFO L480 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2021-05-06 02:29:51,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2021-05-06 02:29:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:29:51,930 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:51,930 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:52,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:29:52,149 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:52,149 INFO L82 PathProgramCache]: Analyzing trace with hash -140733238, now seen corresponding path program 14 times [2021-05-06 02:29:52,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:52,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206250626] [2021-05-06 02:29:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:52,154 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:52,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915072402] [2021-05-06 02:29:52,154 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:52,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:29:52,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 53 conjunts are in the unsatisfiable core [2021-05-06 02:29:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:52,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:52,492 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 84 proven. 66 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 02:29:52,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:29:52,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206250626] [2021-05-06 02:29:52,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:29:52,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915072402] [2021-05-06 02:29:52,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915072402] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:29:52,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:29:52,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:29:52,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972996916] [2021-05-06 02:29:52,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:29:52,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:29:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:29:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:29:52,494 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:29:52,915 INFO L93 Difference]: Finished difference Result 497 states and 591 transitions. [2021-05-06 02:29:52,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:29:52,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 104 [2021-05-06 02:29:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:29:52,917 INFO L225 Difference]: With dead ends: 497 [2021-05-06 02:29:52,917 INFO L226 Difference]: Without dead ends: 495 [2021-05-06 02:29:52,918 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:29:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-05-06 02:29:52,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 460. [2021-05-06 02:29:52,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 308 states have internal predecessors, (343), 101 states have call successors, (101), 59 states have call predecessors, (101), 58 states have return successors, (97), 92 states have call predecessors, (97), 97 states have call successors, (97) [2021-05-06 02:29:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 541 transitions. [2021-05-06 02:29:52,945 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 541 transitions. Word has length 104 [2021-05-06 02:29:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:29:52,946 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 541 transitions. [2021-05-06 02:29:52,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 states have internal predecessors, (34), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:29:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 541 transitions. [2021-05-06 02:29:52,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:29:52,946 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:29:52,947 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:29:53,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:53,161 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:29:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:29:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash 560866636, now seen corresponding path program 15 times [2021-05-06 02:29:53,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:29:53,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642068704] [2021-05-06 02:29:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:29:53,165 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:29:53,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21622380] [2021-05-06 02:29:53,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:29:53,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:29:53,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:29:53,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:29:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:29:53,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:53,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:54,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:29:54,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,858 WARN L205 SmtUtils]: Spent 13.81 s on a formula simplification that was a NOOP. DAG size: 40 [2021-05-06 02:30:13,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:13,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:14,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 90 proven. 56 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2021-05-06 02:30:15,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:15,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642068704] [2021-05-06 02:30:15,848 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:15,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21622380] [2021-05-06 02:30:15,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21622380] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:15,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:15,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:30:15,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273155106] [2021-05-06 02:30:15,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:30:15,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:15,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:30:15,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:30:15,849 INFO L87 Difference]: Start difference. First operand 460 states and 541 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 02:30:38,979 WARN L205 SmtUtils]: Spent 20.26 s on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-05-06 02:32:02,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:02,953 INFO L93 Difference]: Finished difference Result 569 states and 704 transitions. [2021-05-06 02:32:02,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:32:02,955 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 104 [2021-05-06 02:32:02,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:02,956 INFO L225 Difference]: With dead ends: 569 [2021-05-06 02:32:02,956 INFO L226 Difference]: Without dead ends: 563 [2021-05-06 02:32:02,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 43146.9ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:32:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-05-06 02:32:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2021-05-06 02:32:02,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 331 states have (on average 1.1570996978851964) internal successors, (383), 341 states have internal predecessors, (383), 118 states have call successors, (118), 63 states have call predecessors, (118), 62 states have return successors, (114), 107 states have call predecessors, (114), 114 states have call successors, (114) [2021-05-06 02:32:02,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 615 transitions. [2021-05-06 02:32:02,993 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 615 transitions. Word has length 104 [2021-05-06 02:32:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:02,993 INFO L480 AbstractCegarLoop]: Abstraction has 512 states and 615 transitions. [2021-05-06 02:32:02,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 13 states have internal predecessors, (34), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-06 02:32:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 615 transitions. [2021-05-06 02:32:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:32:02,994 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:02,994 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:03,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 02:32:03,200 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:03,201 INFO L82 PathProgramCache]: Analyzing trace with hash -152279154, now seen corresponding path program 16 times [2021-05-06 02:32:03,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:03,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465497661] [2021-05-06 02:32:03,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:03,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:03,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2028899242] [2021-05-06 02:32:03,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:03,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:32:03,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:03,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-06 02:32:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:03,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 72 proven. 78 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-05-06 02:32:03,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:32:03,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465497661] [2021-05-06 02:32:03,887 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:32:03,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028899242] [2021-05-06 02:32:03,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028899242] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:32:03,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:32:03,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:32:03,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465123055] [2021-05-06 02:32:03,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:32:03,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:32:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:32:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:32:03,888 INFO L87 Difference]: Start difference. First operand 512 states and 615 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:32:05,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:32:05,177 INFO L93 Difference]: Finished difference Result 541 states and 656 transitions. [2021-05-06 02:32:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:32:05,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 104 [2021-05-06 02:32:05,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:32:05,179 INFO L225 Difference]: With dead ends: 541 [2021-05-06 02:32:05,179 INFO L226 Difference]: Without dead ends: 539 [2021-05-06 02:32:05,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:32:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-05-06 02:32:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 505. [2021-05-06 02:32:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 326 states have (on average 1.156441717791411) internal successors, (377), 337 states have internal predecessors, (377), 117 states have call successors, (117), 62 states have call predecessors, (117), 61 states have return successors, (113), 105 states have call predecessors, (113), 113 states have call successors, (113) [2021-05-06 02:32:05,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 607 transitions. [2021-05-06 02:32:05,214 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 607 transitions. Word has length 104 [2021-05-06 02:32:05,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:32:05,214 INFO L480 AbstractCegarLoop]: Abstraction has 505 states and 607 transitions. [2021-05-06 02:32:05,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 02:32:05,214 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 607 transitions. [2021-05-06 02:32:05,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-06 02:32:05,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:32:05,215 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:32:05,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-06 02:32:05,425 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:32:05,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:32:05,425 INFO L82 PathProgramCache]: Analyzing trace with hash 549320720, now seen corresponding path program 17 times [2021-05-06 02:32:05,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:32:05,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162212961] [2021-05-06 02:32:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:32:05,429 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:32:05,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949397082] [2021-05-06 02:32:05,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:32:05,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-06 02:32:05,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:32:05,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:32:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:32:05,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:05,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:06,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:07,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:32:08,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:45,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:46,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:47,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:33:48,261 WARN L159 QuantifierPusher]: Ignoring assumption.