/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 03:14:59,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 03:14:59,360 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 03:14:59,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 03:14:59,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 03:14:59,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 03:14:59,425 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 03:14:59,426 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 03:14:59,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 03:14:59,430 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 03:14:59,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 03:14:59,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 03:14:59,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 03:14:59,438 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 03:14:59,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 03:14:59,439 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 03:14:59,440 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 03:14:59,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 03:14:59,447 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 03:14:59,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 03:14:59,449 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 03:14:59,469 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 03:14:59,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 03:14:59,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 03:14:59,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 03:14:59,470 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 03:14:59,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 03:14:59,471 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 03:14:59,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 03:14:59,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 03:14:59,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 03:14:59,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 03:14:59,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 03:14:59,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 03:14:59,472 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 03:14:59,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 03:14:59,473 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 03:14:59,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 03:14:59,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 03:14:59,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 03:14:59,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 03:14:59,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 03:14:59,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 03:14:59,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 03:14:59,474 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 03:14:59,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 03:14:59,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 03:14:59,475 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 03:14:59,475 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 03:14:59,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 03:14:59,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 03:14:59,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 03:14:59,812 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 03:14:59,813 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 03:14:59,817 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 03:14:59,817 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2021-05-06 03:14:59,874 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b0870ec4/8ce929ac3cd44386ba1696b0cac7568b/FLAGf7ed589d9 [2021-05-06 03:15:00,302 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 03:15:00,303 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c [2021-05-06 03:15:00,308 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b0870ec4/8ce929ac3cd44386ba1696b0cac7568b/FLAGf7ed589d9 [2021-05-06 03:15:00,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b0870ec4/8ce929ac3cd44386ba1696b0cac7568b [2021-05-06 03:15:00,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 03:15:00,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 03:15:00,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 03:15:00,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 03:15:00,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 03:15:00,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d54c88b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00, skipping insertion in model container [2021-05-06 03:15:00,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 03:15:00,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 03:15:00,495 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c[546,559] [2021-05-06 03:15:00,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:15:00,524 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 03:15:00,537 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound5.c[546,559] [2021-05-06 03:15:00,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 03:15:00,564 INFO L208 MainTranslator]: Completed translation [2021-05-06 03:15:00,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00 WrapperNode [2021-05-06 03:15:00,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 03:15:00,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 03:15:00,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 03:15:00,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 03:15:00,592 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (1/1) ... [2021-05-06 03:15:00,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 03:15:00,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 03:15:00,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 03:15:00,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 03:15:00,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (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 03:15:00,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 03:15:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 03:15:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 03:15:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 03:15:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 03:15:00,713 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 03:15:00,714 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 03:15:00,714 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 03:15:00,714 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 03:15:00,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 03:15:00,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-06 03:15:00,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 03:15:00,716 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 03:15:00,716 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 03:15:00,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 03:15:00,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 03:15:00,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 03:15:00,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 03:15:00,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 03:15:00,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 03:15:00,999 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 03:15:00,999 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 03:15:01,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:15:01 BoogieIcfgContainer [2021-05-06 03:15:01,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 03:15:01,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 03:15:01,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 03:15:01,004 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 03:15:01,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 03:15:00" (1/3) ... [2021-05-06 03:15:01,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22aa6b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:15:01, skipping insertion in model container [2021-05-06 03:15:01,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 03:15:00" (2/3) ... [2021-05-06 03:15:01,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22aa6b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 03:15:01, skipping insertion in model container [2021-05-06 03:15:01,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 03:15:01" (3/3) ... [2021-05-06 03:15:01,020 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound5.c [2021-05-06 03:15:01,025 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 03:15:01,027 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 03:15:01,047 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 03:15:01,067 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 03:15:01,068 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 03:15:01,068 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 03:15:01,068 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 03:15:01,068 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 03:15:01,068 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 03:15:01,068 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 03:15:01,068 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 03:15:01,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 03:15:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:15:01,084 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:01,085 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:01,085 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2021-05-06 03:15:01,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:01,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517740110] [2021-05-06 03:15:01,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:15:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:15:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:15:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:15:01,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:15:01,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:01,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517740110] [2021-05-06 03:15:01,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517740110] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:01,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:01,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 03:15:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767025729] [2021-05-06 03:15:01,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 03:15:01,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:01,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 03:15:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:15:01,314 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:15:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:01,426 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2021-05-06 03:15:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 03:15:01,428 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-06 03:15:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:01,434 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:15:01,434 INFO L226 Difference]: Without dead ends: 33 [2021-05-06 03:15:01,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 03:15:01,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-06 03:15:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-06 03:15:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:15:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-05-06 03:15:01,483 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2021-05-06 03:15:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:01,483 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-05-06 03:15:01,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 03:15:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-05-06 03:15:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-06 03:15:01,485 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:01,485 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:01,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 03:15:01,485 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:01,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:01,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2021-05-06 03:15:01,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:01,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215851436] [2021-05-06 03:15:01,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:15:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:15:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:15:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:15:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:01,657 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:15:01,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:01,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215851436] [2021-05-06 03:15:01,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215851436] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:01,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:01,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:15:01,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48445593] [2021-05-06 03:15:01,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:15:01,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:01,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:15:01,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:15:01,660 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:15:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:02,012 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2021-05-06 03:15:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:15:02,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2021-05-06 03:15:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:02,015 INFO L225 Difference]: With dead ends: 46 [2021-05-06 03:15:02,016 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 03:15:02,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:15:02,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 03:15:02,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 03:15:02,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:15:02,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2021-05-06 03:15:02,039 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2021-05-06 03:15:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:02,041 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2021-05-06 03:15:02,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-05-06 03:15:02,041 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2021-05-06 03:15:02,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 03:15:02,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:02,042 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:02,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 03:15:02,042 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2021-05-06 03:15:02,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:02,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528434486] [2021-05-06 03:15:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:02,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 03:15:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:02,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 03:15:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:02,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 03:15:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:02,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 03:15:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-05-06 03:15:02,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 03:15:02,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:02,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528434486] [2021-05-06 03:15:02,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528434486] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:02,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:02,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 03:15:02,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042152324] [2021-05-06 03:15:02,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 03:15:02,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:02,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 03:15:02,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:15:02,159 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 03:15:02,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:02,514 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2021-05-06 03:15:02,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:15:02,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 03:15:02,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:02,516 INFO L225 Difference]: With dead ends: 50 [2021-05-06 03:15:02,516 INFO L226 Difference]: Without dead ends: 48 [2021-05-06 03:15:02,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:15:02,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-06 03:15:02,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2021-05-06 03:15:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 03:15:02,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2021-05-06 03:15:02,532 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2021-05-06 03:15:02,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:02,533 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2021-05-06 03:15:02,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 03:15:02,533 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2021-05-06 03:15:02,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-06 03:15:02,534 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:02,534 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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 03:15:02,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 03:15:02,534 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2021-05-06 03:15:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:02,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654571415] [2021-05-06 03:15:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:02,547 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:02,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1198074455] [2021-05-06 03:15:02,547 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 03:15:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:02,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 03:15:02,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:02,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 03:15:02,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654571415] [2021-05-06 03:15:02,753 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198074455] [2021-05-06 03:15:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198074455] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 03:15:02,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 03:15:02,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 03:15:02,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929820842] [2021-05-06 03:15:02,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 03:15:02,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:02,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 03:15:02,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 03:15:02,755 INFO L87 Difference]: Start difference. First operand 41 states and 49 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, (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 03:15:02,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:02,816 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2021-05-06 03:15:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 03:15:02,816 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, (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 38 [2021-05-06 03:15:02,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:02,817 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:15:02,817 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 03:15:02,818 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 03:15:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 03:15:02,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-05-06 03:15:02,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 03:15:02,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2021-05-06 03:15:02,828 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2021-05-06 03:15:02,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:02,829 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2021-05-06 03:15:02,829 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, (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 03:15:02,829 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2021-05-06 03:15:02,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 03:15:02,830 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:02,830 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:03,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:03,055 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:03,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2021-05-06 03:15:03,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:03,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153842727] [2021-05-06 03:15:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:03,065 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:03,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645733026] [2021-05-06 03:15:03,066 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 03:15:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:03,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 03:15:03,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:03,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-06 03:15:03,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153842727] [2021-05-06 03:15:03,465 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:03,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645733026] [2021-05-06 03:15:03,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645733026] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:03,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:03,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:15:03,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524003733] [2021-05-06 03:15:03,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:15:03,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:03,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:15:03,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:15:03,467 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:15:03,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:03,624 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-05-06 03:15:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:15:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-05-06 03:15:03,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:03,627 INFO L225 Difference]: With dead ends: 69 [2021-05-06 03:15:03,627 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 03:15:03,628 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 79.5ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:15:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 03:15:03,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-06 03:15:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 15 states have call successors, (15), 9 states have call predecessors, (15), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 03:15:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2021-05-06 03:15:03,641 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 45 [2021-05-06 03:15:03,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:03,642 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2021-05-06 03:15:03,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 03:15:03,642 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2021-05-06 03:15:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 03:15:03,646 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:03,647 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 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] [2021-05-06 03:15:03,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:03,863 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:03,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:03,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2021-05-06 03:15:03,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:03,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098624973] [2021-05-06 03:15:03,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:03,882 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:03,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404838368] [2021-05-06 03:15:03,882 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 03:15:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:03,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-06 03:15:03,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:04,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,150 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-05-06 03:15:04,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:04,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098624973] [2021-05-06 03:15:04,151 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:04,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404838368] [2021-05-06 03:15:04,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404838368] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:04,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:04,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 03:15:04,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504895736] [2021-05-06 03:15:04,153 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 03:15:04,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 03:15:04,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:15:04,154 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:15:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:04,388 INFO L93 Difference]: Finished difference Result 91 states and 115 transitions. [2021-05-06 03:15:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 03:15:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 03:15:04,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:04,393 INFO L225 Difference]: With dead ends: 91 [2021-05-06 03:15:04,393 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 03:15:04,396 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:15:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 03:15:04,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 03:15:04,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:15:04,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2021-05-06 03:15:04,423 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 55 [2021-05-06 03:15:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:04,424 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2021-05-06 03:15:04,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 03:15:04,424 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2021-05-06 03:15:04,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 03:15:04,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:04,425 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-06 03:15:04,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:04,649 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:04,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:04,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1784683007, now seen corresponding path program 1 times [2021-05-06 03:15:04,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:04,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379085736] [2021-05-06 03:15:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:04,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:04,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2078041204] [2021-05-06 03:15:04,659 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 03:15:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:04,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:15:04,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:04,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:04,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-06 03:15:05,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379085736] [2021-05-06 03:15:05,104 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:05,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078041204] [2021-05-06 03:15:05,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078041204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:05,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:05,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:15:05,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596052671] [2021-05-06 03:15:05,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:15:05,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:15:05,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:15:05,110 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:15:05,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:05,361 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-05-06 03:15:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:15:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2021-05-06 03:15:05,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:05,363 INFO L225 Difference]: With dead ends: 96 [2021-05-06 03:15:05,363 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 03:15:05,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:15:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 03:15:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-06 03:15:05,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 03:15:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-05-06 03:15:05,375 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 62 [2021-05-06 03:15:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:05,376 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-05-06 03:15:05,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 03:15:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-05-06 03:15:05,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-06 03:15:05,377 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:05,377 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:05,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:05,593 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:05,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1254068366, now seen corresponding path program 2 times [2021-05-06 03:15:05,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:05,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667395400] [2021-05-06 03:15:05,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:05,605 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:05,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721544713] [2021-05-06 03:15:05,606 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 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 03:15:05,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:15:05,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:15:05,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-06 03:15:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:05,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-05-06 03:15:05,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:05,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667395400] [2021-05-06 03:15:05,922 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:05,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721544713] [2021-05-06 03:15:05,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721544713] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:05,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:05,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 03:15:05,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867350172] [2021-05-06 03:15:05,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 03:15:05,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:05,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 03:15:05,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:15:05,923 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:15:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:06,168 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2021-05-06 03:15:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 03:15:06,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 72 [2021-05-06 03:15:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:06,172 INFO L225 Difference]: With dead ends: 127 [2021-05-06 03:15:06,172 INFO L226 Difference]: Without dead ends: 113 [2021-05-06 03:15:06,174 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-06 03:15:06,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-06 03:15:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-05-06 03:15:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.123076923076923) internal successors, (73), 68 states have internal predecessors, (73), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 03:15:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2021-05-06 03:15:06,190 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 72 [2021-05-06 03:15:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:06,191 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2021-05-06 03:15:06,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:15:06,191 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2021-05-06 03:15:06,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-06 03:15:06,192 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:06,192 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:06,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:06,417 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:06,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:06,418 INFO L82 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2021-05-06 03:15:06,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:06,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428671481] [2021-05-06 03:15:06,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:06,426 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:06,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96319659] [2021-05-06 03:15:06,426 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 03:15:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:06,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 03:15:06,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:06,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:06,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,007 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 42 proven. 8 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-05-06 03:15:07,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:07,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428671481] [2021-05-06 03:15:07,007 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:07,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96319659] [2021-05-06 03:15:07,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96319659] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:07,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:07,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 03:15:07,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527224484] [2021-05-06 03:15:07,008 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 03:15:07,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:07,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 03:15:07,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:15:07,009 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:15:07,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:07,321 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2021-05-06 03:15:07,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:15:07,321 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-05-06 03:15:07,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:07,327 INFO L225 Difference]: With dead ends: 123 [2021-05-06 03:15:07,327 INFO L226 Difference]: Without dead ends: 121 [2021-05-06 03:15:07,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 198.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:15:07,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-06 03:15:07,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-05-06 03:15:07,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 74 states have internal predecessors, (79), 32 states have call successors, (32), 16 states have call predecessors, (32), 15 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-06 03:15:07,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2021-05-06 03:15:07,350 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 75 [2021-05-06 03:15:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:07,351 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2021-05-06 03:15:07,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 12 states have internal predecessors, (28), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-06 03:15:07,351 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2021-05-06 03:15:07,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-05-06 03:15:07,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:07,352 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:07,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:07,573 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:07,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:07,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1211630783, now seen corresponding path program 2 times [2021-05-06 03:15:07,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:07,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316821766] [2021-05-06 03:15:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:07,582 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:07,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781195497] [2021-05-06 03:15:07,582 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 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 03:15:07,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:15:07,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:15:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 03:15:07,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:07,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:07,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:08,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:08,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:08,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:08,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:08,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:08,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-05-06 03:15:08,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:08,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316821766] [2021-05-06 03:15:08,140 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:08,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781195497] [2021-05-06 03:15:08,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781195497] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:08,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:08,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 03:15:08,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11218534] [2021-05-06 03:15:08,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 03:15:08,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:08,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 03:15:08,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-06 03:15:08,142 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 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 03:15:08,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:08,603 INFO L93 Difference]: Finished difference Result 143 states and 166 transitions. [2021-05-06 03:15:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:15:08,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 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 79 [2021-05-06 03:15:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:08,605 INFO L225 Difference]: With dead ends: 143 [2021-05-06 03:15:08,605 INFO L226 Difference]: Without dead ends: 136 [2021-05-06 03:15:08,606 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 311.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-06 03:15:08,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-06 03:15:08,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-05-06 03:15:08,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 86 states have internal predecessors, (91), 34 states have call successors, (34), 19 states have call predecessors, (34), 18 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2021-05-06 03:15:08,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 156 transitions. [2021-05-06 03:15:08,618 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 156 transitions. Word has length 79 [2021-05-06 03:15:08,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:08,618 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 156 transitions. [2021-05-06 03:15:08,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 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 03:15:08,618 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 156 transitions. [2021-05-06 03:15:08,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-06 03:15:08,619 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:08,619 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:08,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 03:15:08,842 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:08,843 INFO L82 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2021-05-06 03:15:08,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:08,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446579651] [2021-05-06 03:15:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:08,851 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:08,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682193525] [2021-05-06 03:15:08,851 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 03:15:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 03:15:08,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 03:15:08,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:09,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-05-06 03:15:09,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:09,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446579651] [2021-05-06 03:15:09,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:09,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682193525] [2021-05-06 03:15:09,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682193525] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:09,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:09,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 03:15:09,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46817741] [2021-05-06 03:15:09,077 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 03:15:09,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:09,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 03:15:09,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 03:15:09,078 INFO L87 Difference]: Start difference. First operand 136 states and 156 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:15:09,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:09,191 INFO L93 Difference]: Finished difference Result 160 states and 190 transitions. [2021-05-06 03:15:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 03:15:09,192 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 86 [2021-05-06 03:15:09,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:09,193 INFO L225 Difference]: With dead ends: 160 [2021-05-06 03:15:09,193 INFO L226 Difference]: Without dead ends: 135 [2021-05-06 03:15:09,195 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-06 03:15:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-05-06 03:15:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2021-05-06 03:15:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 83 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-06 03:15:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 157 transitions. [2021-05-06 03:15:09,211 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 157 transitions. Word has length 86 [2021-05-06 03:15:09,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:09,211 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 157 transitions. [2021-05-06 03:15:09,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-05-06 03:15:09,211 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 157 transitions. [2021-05-06 03:15:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 03:15:09,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:09,212 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:09,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-06 03:15:09,433 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:09,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:09,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1094644914, now seen corresponding path program 3 times [2021-05-06 03:15:09,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:09,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951623877] [2021-05-06 03:15:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:09,441 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:09,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999811601] [2021-05-06 03:15:09,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:09,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 03:15:09,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:15:09,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 03:15:09,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:09,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:09,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:09,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:09,745 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 59 proven. 7 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-05-06 03:15:09,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:09,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951623877] [2021-05-06 03:15:09,746 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:09,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999811601] [2021-05-06 03:15:09,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999811601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:09,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:09,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 03:15:09,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644163795] [2021-05-06 03:15:09,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 03:15:09,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:09,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 03:15:09,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 03:15:09,747 INFO L87 Difference]: Start difference. First operand 132 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 03:15:10,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:10,134 INFO L93 Difference]: Finished difference Result 163 states and 194 transitions. [2021-05-06 03:15:10,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 03:15:10,134 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-05-06 03:15:10,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:10,135 INFO L225 Difference]: With dead ends: 163 [2021-05-06 03:15:10,136 INFO L226 Difference]: Without dead ends: 151 [2021-05-06 03:15:10,136 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-06 03:15:10,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-06 03:15:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-05-06 03:15:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 96 states have internal predecessors, (101), 42 states have call successors, (42), 19 states have call predecessors, (42), 18 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2021-05-06 03:15:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 181 transitions. [2021-05-06 03:15:10,154 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 181 transitions. Word has length 89 [2021-05-06 03:15:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:10,154 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 181 transitions. [2021-05-06 03:15:10,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-06 03:15:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 181 transitions. [2021-05-06 03:15:10,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 03:15:10,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:10,155 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 03:15:10,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:10,369 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:10,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 2 times [2021-05-06 03:15:10,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:10,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578068827] [2021-05-06 03:15:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:10,380 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:10,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400429816] [2021-05-06 03:15:10,381 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 03:15:10,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:15:10,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:15:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 03:15:10,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:10,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 22 proven. 23 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2021-05-06 03:15:10,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:10,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578068827] [2021-05-06 03:15:10,911 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:10,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400429816] [2021-05-06 03:15:10,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400429816] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:10,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:10,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 03:15:10,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872073761] [2021-05-06 03:15:10,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 03:15:10,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:10,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 03:15:10,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 03:15:10,912 INFO L87 Difference]: Start difference. First operand 151 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 03:15:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:11,371 INFO L93 Difference]: Finished difference Result 178 states and 206 transitions. [2021-05-06 03:15:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 03:15:11,372 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2021-05-06 03:15:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:11,373 INFO L225 Difference]: With dead ends: 178 [2021-05-06 03:15:11,373 INFO L226 Difference]: Without dead ends: 157 [2021-05-06 03:15:11,373 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 161.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-06 03:15:11,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-05-06 03:15:11,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2021-05-06 03:15:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 93 states have (on average 1.10752688172043) internal successors, (103), 99 states have internal predecessors, (103), 40 states have call successors, (40), 21 states have call predecessors, (40), 20 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-06 03:15:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 180 transitions. [2021-05-06 03:15:11,387 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 180 transitions. Word has length 92 [2021-05-06 03:15:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:11,388 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 180 transitions. [2021-05-06 03:15:11,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 7 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2021-05-06 03:15:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 180 transitions. [2021-05-06 03:15:11,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 03:15:11,389 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:11,389 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-05-06 03:15:11,589 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 03:15:11,589 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:11,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:11,590 INFO L82 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 3 times [2021-05-06 03:15:11,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:11,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944982851] [2021-05-06 03:15:11,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:11,598 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:11,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218330503] [2021-05-06 03:15:11,598 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 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 03:15:11,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 03:15:11,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:15:11,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 03:15:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:11,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:11,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,270 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2021-05-06 03:15:12,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:12,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944982851] [2021-05-06 03:15:12,315 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:12,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218330503] [2021-05-06 03:15:12,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218330503] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:12,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:12,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 03:15:12,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476542625] [2021-05-06 03:15:12,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 03:15:12,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 03:15:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:15:12,316 INFO L87 Difference]: Start difference. First operand 154 states and 180 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 03:15:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:12,767 INFO L93 Difference]: Finished difference Result 167 states and 192 transitions. [2021-05-06 03:15:12,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:15:12,767 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2021-05-06 03:15:12,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:12,769 INFO L225 Difference]: With dead ends: 167 [2021-05-06 03:15:12,769 INFO L226 Difference]: Without dead ends: 156 [2021-05-06 03:15:12,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:15:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-06 03:15:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2021-05-06 03:15:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 100 states have internal predecessors, (104), 39 states have call successors, (39), 22 states have call predecessors, (39), 21 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2021-05-06 03:15:12,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2021-05-06 03:15:12,783 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 105 [2021-05-06 03:15:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:12,783 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2021-05-06 03:15:12,783 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 03:15:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2021-05-06 03:15:12,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-05-06 03:15:12,784 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:12,784 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 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 03:15:13,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 03:15:13,001 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1356075623, now seen corresponding path program 4 times [2021-05-06 03:15:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:13,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010049131] [2021-05-06 03:15:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:13,008 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:13,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [820892602] [2021-05-06 03:15:13,008 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 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 03:15:13,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 03:15:13,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:15:13,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 03:15:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:13,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2021-05-06 03:15:13,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 03:15:13,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010049131] [2021-05-06 03:15:13,599 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 03:15:13,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820892602] [2021-05-06 03:15:13,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820892602] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 03:15:13,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 03:15:13,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 03:15:13,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497994408] [2021-05-06 03:15:13,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 03:15:13,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 03:15:13,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 03:15:13,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-06 03:15:13,601 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:15:14,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 03:15:14,097 INFO L93 Difference]: Finished difference Result 232 states and 279 transitions. [2021-05-06 03:15:14,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 03:15:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 109 [2021-05-06 03:15:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 03:15:14,099 INFO L225 Difference]: With dead ends: 232 [2021-05-06 03:15:14,099 INFO L226 Difference]: Without dead ends: 198 [2021-05-06 03:15:14,100 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-06 03:15:14,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-06 03:15:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2021-05-06 03:15:14,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 120 states have (on average 1.1083333333333334) internal successors, (133), 125 states have internal predecessors, (133), 48 states have call successors, (48), 27 states have call predecessors, (48), 26 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2021-05-06 03:15:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 226 transitions. [2021-05-06 03:15:14,132 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 226 transitions. Word has length 109 [2021-05-06 03:15:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 03:15:14,132 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 226 transitions. [2021-05-06 03:15:14,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2021-05-06 03:15:14,133 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 226 transitions. [2021-05-06 03:15:14,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 03:15:14,134 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 03:15:14,134 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2021-05-06 03:15:14,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-06 03:15:14,353 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 03:15:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 03:15:14,353 INFO L82 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 2 times [2021-05-06 03:15:14,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 03:15:14,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641148145] [2021-05-06 03:15:14,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 03:15:14,359 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 03:15:14,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [739692897] [2021-05-06 03:15:14,360 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 03:15:14,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 03:15:14,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 03:15:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-06 03:15:14,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 03:15:14,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:14,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 03:15:15,347 WARN L159 QuantifierPusher]: Ignoring assumption.