/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/egcd2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 02:30:51,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 02:30:51,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 02:30:51,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 02:30:51,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 02:30:51,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 02:30:51,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 02:30:51,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 02:30:51,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 02:30:51,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 02:30:51,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 02:30:51,718 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 02:30:51,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 02:30:51,721 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 02:30:51,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 02:30:51,725 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 02:30:51,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 02:30:51,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 02:30:51,738 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 02:30:51,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 02:30:51,739 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-06 02:30:51,775 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 02:30:51,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 02:30:51,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 02:30:51,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 02:30:51,781 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 02:30:51,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 02:30:51,781 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 02:30:51,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 02:30:51,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 02:30:51,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 02:30:51,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 02:30:51,783 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 02:30:51,783 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 02:30:51,783 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 02:30:51,783 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 02:30:51,783 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 02:30:51,783 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 02:30:51,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 02:30:51,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 02:30:51,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 02:30:51,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:30:51,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 02:30:51,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 02:30:51,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 02:30:51,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 02:30:51,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 02:30:51,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 02:30:51,785 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 02:30:51,785 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 02:30:52,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 02:30:52,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 02:30:52,137 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 02:30:52,138 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 02:30:52,140 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 02:30:52,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2021-05-06 02:30:52,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/728ba710e/49b6730e4ffa4354acb4a1033a5c56fa/FLAGf9d39dfb9 [2021-05-06 02:30:52,716 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 02:30:52,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2021-05-06 02:30:52,729 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/728ba710e/49b6730e4ffa4354acb4a1033a5c56fa/FLAGf9d39dfb9 [2021-05-06 02:30:53,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/728ba710e/49b6730e4ffa4354acb4a1033a5c56fa [2021-05-06 02:30:53,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 02:30:53,094 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 02:30:53,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 02:30:53,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 02:30:53,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 02:30:53,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@717cfeff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53, skipping insertion in model container [2021-05-06 02:30:53,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 02:30:53,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 02:30:53,245 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/egcd2-ll_unwindbound20.c[490,503] [2021-05-06 02:30:53,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:30:53,289 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 02:30:53,325 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/egcd2-ll_unwindbound20.c[490,503] [2021-05-06 02:30:53,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 02:30:53,397 INFO L208 MainTranslator]: Completed translation [2021-05-06 02:30:53,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53 WrapperNode [2021-05-06 02:30:53,398 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 02:30:53,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 02:30:53,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 02:30:53,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 02:30:53,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (1/1) ... [2021-05-06 02:30:53,443 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 02:30:53,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 02:30:53,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 02:30:53,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 02:30:53,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 02:30:53,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 02:30:53,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 02:30:53,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 02:30:53,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 02:30:53,541 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 02:30:53,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 02:30:53,541 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 02:30:53,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 02:30:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 02:30:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 02:30:53,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 02:30:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 02:30:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 02:30:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 02:30:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 02:30:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 02:30:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 02:30:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 02:30:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 02:30:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 02:30:53,910 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 02:30:53,910 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 02:30:53,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:30:53 BoogieIcfgContainer [2021-05-06 02:30:53,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 02:30:53,913 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 02:30:53,913 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 02:30:53,916 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 02:30:53,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 02:30:53" (1/3) ... [2021-05-06 02:30:53,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5714e298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:30:53, skipping insertion in model container [2021-05-06 02:30:53,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 02:30:53" (2/3) ... [2021-05-06 02:30:53,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5714e298 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 02:30:53, skipping insertion in model container [2021-05-06 02:30:53,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 02:30:53" (3/3) ... [2021-05-06 02:30:53,919 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2021-05-06 02:30:53,924 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 02:30:53,927 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 02:30:53,943 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 02:30:53,965 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 02:30:53,965 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 02:30:53,965 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 02:30:53,965 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 02:30:53,965 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 02:30:53,965 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 02:30:53,965 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 02:30:53,966 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 02:30:53,986 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 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 02:30:53,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-06 02:30:53,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:53,992 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:53,992 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:53,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:53,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2021-05-06 02:30:54,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:54,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230436590] [2021-05-06 02:30:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:54,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 02:30:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:54,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 02:30:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:54,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-06 02:30:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:54,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 02:30:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:54,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 02:30:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:30:54,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:54,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230436590] [2021-05-06 02:30:54,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230436590] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:30:54,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:30:54,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 02:30:54,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937497393] [2021-05-06 02:30:54,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 02:30:54,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:54,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 02:30:54,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:30:54,334 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 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 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:54,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:54,473 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2021-05-06 02:30:54,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 02:30:54,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2021-05-06 02:30:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:54,481 INFO L225 Difference]: With dead ends: 72 [2021-05-06 02:30:54,481 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 02:30:54,484 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 02:30:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 02:30:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-05-06 02:30:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 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 02:30:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2021-05-06 02:30:54,521 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2021-05-06 02:30:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:54,522 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2021-05-06 02:30:54,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:54,522 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2021-05-06 02:30:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-06 02:30:54,524 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:54,524 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:54,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 02:30:54,524 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:54,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:54,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2021-05-06 02:30:54,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:54,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974456475] [2021-05-06 02:30:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:54,550 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:54,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1491213187] [2021-05-06 02:30:54,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:54,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:30:54,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:54,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:54,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:54,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:54,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:54,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:30:54,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:54,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974456475] [2021-05-06 02:30:54,805 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:54,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491213187] [2021-05-06 02:30:54,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491213187] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:30:54,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:30:54,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 02:30:54,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993509836] [2021-05-06 02:30:54,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 02:30:54,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:54,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 02:30:54,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:30:54,809 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:54,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:54,837 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-05-06 02:30:54,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 02:30:54,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-06 02:30:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:54,839 INFO L225 Difference]: With dead ends: 44 [2021-05-06 02:30:54,839 INFO L226 Difference]: Without dead ends: 36 [2021-05-06 02:30:54,840 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 02:30:54,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-06 02:30:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-06 02:30:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 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 02:30:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-05-06 02:30:54,850 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2021-05-06 02:30:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:54,851 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-05-06 02:30:54,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:54,852 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-05-06 02:30:54,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 02:30:54,858 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:54,858 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:55,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 02:30:55,084 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:55,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:55,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2021-05-06 02:30:55,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:55,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591807085] [2021-05-06 02:30:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:55,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:55,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534120328] [2021-05-06 02:30:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:55,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:30:55,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:55,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:30:55,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:55,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591807085] [2021-05-06 02:30:55,320 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:55,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534120328] [2021-05-06 02:30:55,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534120328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:55,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:55,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:30:55,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118398494] [2021-05-06 02:30:55,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:30:55,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:30:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:30:55,322 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:55,413 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2021-05-06 02:30:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:30:55,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 02:30:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:55,415 INFO L225 Difference]: With dead ends: 53 [2021-05-06 02:30:55,415 INFO L226 Difference]: Without dead ends: 45 [2021-05-06 02:30:55,416 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:30:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-06 02:30:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-05-06 02:30:55,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 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 02:30:55,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 02:30:55,427 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2021-05-06 02:30:55,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:55,427 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 02:30:55,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:55,428 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 02:30:55,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-06 02:30:55,428 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:55,429 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:55,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:55,652 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:55,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:55,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2021-05-06 02:30:55,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:55,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579351379] [2021-05-06 02:30:55,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:55,664 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:55,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782323537] [2021-05-06 02:30:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:55,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:30:55,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:55,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:30:55,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579351379] [2021-05-06 02:30:55,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782323537] [2021-05-06 02:30:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782323537] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:55,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:55,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:30:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769593836] [2021-05-06 02:30:55,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:30:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:55,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:30:55,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:30:55,937 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:56,090 INFO L93 Difference]: Finished difference Result 59 states and 81 transitions. [2021-05-06 02:30:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:30:56,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2021-05-06 02:30:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:56,092 INFO L225 Difference]: With dead ends: 59 [2021-05-06 02:30:56,092 INFO L226 Difference]: Without dead ends: 57 [2021-05-06 02:30:56,093 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:30:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-06 02:30:56,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-05-06 02:30:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:30:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2021-05-06 02:30:56,103 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2021-05-06 02:30:56,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:56,103 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2021-05-06 02:30:56,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:56,104 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2021-05-06 02:30:56,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 02:30:56,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:56,105 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:56,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:56,329 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:56,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:56,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2021-05-06 02:30:56,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:56,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549016909] [2021-05-06 02:30:56,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:56,342 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:56,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [902184962] [2021-05-06 02:30:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:56,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:30:56,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:56,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:56,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:56,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:56,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:56,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:56,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:56,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:56,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 02:30:56,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:56,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549016909] [2021-05-06 02:30:56,553 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:56,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902184962] [2021-05-06 02:30:56,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902184962] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:30:56,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:30:56,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:30:56,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812027096] [2021-05-06 02:30:56,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:30:56,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:56,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:30:56,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:30:56,556 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:56,623 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-05-06 02:30:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 02:30:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2021-05-06 02:30:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:56,630 INFO L225 Difference]: With dead ends: 63 [2021-05-06 02:30:56,630 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 02:30:56,633 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:30:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 02:30:56,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-06 02:30:56,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 28 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 02:30:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-05-06 02:30:56,647 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 39 [2021-05-06 02:30:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:56,648 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-05-06 02:30:56,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 02:30:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2021-05-06 02:30:56,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-06 02:30:56,653 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:56,653 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:56,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:56,871 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:56,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:56,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2021-05-06 02:30:56,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:56,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824617503] [2021-05-06 02:30:56,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:56,883 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:56,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365414355] [2021-05-06 02:30:56,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:56,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:56,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 02:30:56,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:57,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-06 02:30:57,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824617503] [2021-05-06 02:30:57,148 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:57,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365414355] [2021-05-06 02:30:57,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365414355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:57,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:57,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:30:57,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443786866] [2021-05-06 02:30:57,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:30:57,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:57,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:30:57,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:30:57,151 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:30:57,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:57,265 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2021-05-06 02:30:57,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:30:57,266 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-06 02:30:57,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:57,269 INFO L225 Difference]: With dead ends: 58 [2021-05-06 02:30:57,269 INFO L226 Difference]: Without dead ends: 56 [2021-05-06 02:30:57,270 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:30:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-06 02:30:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-06 02:30:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:30:57,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2021-05-06 02:30:57,294 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 41 [2021-05-06 02:30:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:57,295 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2021-05-06 02:30:57,295 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), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 02:30:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2021-05-06 02:30:57,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-06 02:30:57,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:57,297 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1] [2021-05-06 02:30:57,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 02:30:57,501 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:57,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2021-05-06 02:30:57,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:57,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335214671] [2021-05-06 02:30:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:57,515 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:57,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658746795] [2021-05-06 02:30:57,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:57,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:30:57,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:57,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-06 02:30:57,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:57,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335214671] [2021-05-06 02:30:57,798 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:57,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658746795] [2021-05-06 02:30:57,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658746795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:57,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:57,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:30:57,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656246824] [2021-05-06 02:30:57,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:30:57,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:57,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:30:57,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:30:57,802 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:30:57,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:57,953 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2021-05-06 02:30:57,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:30:57,953 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2021-05-06 02:30:57,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:57,954 INFO L225 Difference]: With dead ends: 62 [2021-05-06 02:30:57,954 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 02:30:57,955 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:30:57,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 02:30:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-06 02:30:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:30:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2021-05-06 02:30:57,963 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 46 [2021-05-06 02:30:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:57,963 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2021-05-06 02:30:57,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 02:30:57,964 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2021-05-06 02:30:57,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 02:30:57,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:57,965 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:58,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:58,191 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:58,192 INFO L82 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2021-05-06 02:30:58,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:58,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511424511] [2021-05-06 02:30:58,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:58,201 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:58,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25197655] [2021-05-06 02:30:58,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:58,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-06 02:30:58,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:58,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-06 02:30:58,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:58,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511424511] [2021-05-06 02:30:58,464 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:58,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25197655] [2021-05-06 02:30:58,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25197655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:58,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:58,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:30:58,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005380900] [2021-05-06 02:30:58,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:30:58,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:58,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:30:58,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:30:58,466 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:30:58,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:58,655 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2021-05-06 02:30:58,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:30:58,655 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2021-05-06 02:30:58,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:58,657 INFO L225 Difference]: With dead ends: 66 [2021-05-06 02:30:58,657 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 02:30:58,658 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:30:58,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 02:30:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-06 02:30:58,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 40 states have internal predecessors, (45), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 02:30:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2021-05-06 02:30:58,681 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 51 [2021-05-06 02:30:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:58,681 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2021-05-06 02:30:58,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-05-06 02:30:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2021-05-06 02:30:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-06 02:30:58,683 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:58,683 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:58,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:58,897 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:58,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2021-05-06 02:30:58,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:58,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121982881] [2021-05-06 02:30:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:58,906 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:58,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539049064] [2021-05-06 02:30:58,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:58,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:30:58,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:59,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:30:59,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:59,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121982881] [2021-05-06 02:30:59,117 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:59,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539049064] [2021-05-06 02:30:59,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539049064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:59,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:59,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:30:59,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61239795] [2021-05-06 02:30:59,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:30:59,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:59,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:30:59,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:30:59,119 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:30:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:59,222 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2021-05-06 02:30:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:30:59,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2021-05-06 02:30:59,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:59,225 INFO L225 Difference]: With dead ends: 96 [2021-05-06 02:30:59,225 INFO L226 Difference]: Without dead ends: 94 [2021-05-06 02:30:59,225 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:30:59,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-06 02:30:59,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2021-05-06 02:30:59,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:30:59,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2021-05-06 02:30:59,239 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2021-05-06 02:30:59,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:59,239 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2021-05-06 02:30:59,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-06 02:30:59,240 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2021-05-06 02:30:59,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 02:30:59,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:59,241 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:59,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 02:30:59,457 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:59,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:59,457 INFO L82 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2021-05-06 02:30:59,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:59,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960202774] [2021-05-06 02:30:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:59,465 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:59,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086972237] [2021-05-06 02:30:59,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:30:59,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:30:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:30:59,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:30:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:30:59,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:30:59,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960202774] [2021-05-06 02:30:59,678 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:30:59,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086972237] [2021-05-06 02:30:59,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086972237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:30:59,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:30:59,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:30:59,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93548293] [2021-05-06 02:30:59,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:30:59,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:30:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:30:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:30:59,679 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:30:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:30:59,741 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2021-05-06 02:30:59,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:30:59,742 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2021-05-06 02:30:59,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:30:59,743 INFO L225 Difference]: With dead ends: 107 [2021-05-06 02:30:59,743 INFO L226 Difference]: Without dead ends: 99 [2021-05-06 02:30:59,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:30:59,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-05-06 02:30:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-05-06 02:30:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 64 states have internal predecessors, (73), 26 states have call successors, (26), 12 states have call predecessors, (26), 11 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-06 02:30:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 123 transitions. [2021-05-06 02:30:59,753 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 123 transitions. Word has length 60 [2021-05-06 02:30:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:30:59,753 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 123 transitions. [2021-05-06 02:30:59,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:30:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 123 transitions. [2021-05-06 02:30:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 02:30:59,754 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:30:59,754 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:30:59,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:30:59,969 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:30:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:30:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2021-05-06 02:30:59,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:30:59,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586861940] [2021-05-06 02:30:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:30:59,982 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:30:59,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166049998] [2021-05-06 02:30:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:00,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:31:00,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:00,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-06 02:31:00,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:00,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586861940] [2021-05-06 02:31:00,228 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:00,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166049998] [2021-05-06 02:31:00,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166049998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:00,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:00,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:00,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558026505] [2021-05-06 02:31:00,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:00,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:00,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:00,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:00,231 INFO L87 Difference]: Start difference. First operand 99 states and 123 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:31:00,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:00,424 INFO L93 Difference]: Finished difference Result 178 states and 253 transitions. [2021-05-06 02:31:00,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:00,425 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2021-05-06 02:31:00,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:00,427 INFO L225 Difference]: With dead ends: 178 [2021-05-06 02:31:00,427 INFO L226 Difference]: Without dead ends: 170 [2021-05-06 02:31:00,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:00,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-06 02:31:00,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 142. [2021-05-06 02:31:00,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 91 states have internal predecessors, (112), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:31:00,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 196 transitions. [2021-05-06 02:31:00,443 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 196 transitions. Word has length 61 [2021-05-06 02:31:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:00,444 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 196 transitions. [2021-05-06 02:31:00,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 02:31:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 196 transitions. [2021-05-06 02:31:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-06 02:31:00,445 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:00,445 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:00,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:00,661 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2021-05-06 02:31:00,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:00,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493486888] [2021-05-06 02:31:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:00,669 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:00,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245057373] [2021-05-06 02:31:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:00,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-06 02:31:00,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:00,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:00,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:00,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493486888] [2021-05-06 02:31:00,862 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:00,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245057373] [2021-05-06 02:31:00,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245057373] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:00,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:00,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 02:31:00,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974300444] [2021-05-06 02:31:00,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 02:31:00,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:00,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 02:31:00,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-06 02:31:00,864 INFO L87 Difference]: Start difference. First operand 142 states and 196 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:00,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:00,930 INFO L93 Difference]: Finished difference Result 175 states and 244 transitions. [2021-05-06 02:31:00,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:31:00,931 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2021-05-06 02:31:00,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:00,932 INFO L225 Difference]: With dead ends: 175 [2021-05-06 02:31:00,932 INFO L226 Difference]: Without dead ends: 142 [2021-05-06 02:31:00,933 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:00,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-06 02:31:00,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-06 02:31:00,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 87 states have (on average 1.2758620689655173) internal successors, (111), 91 states have internal predecessors, (111), 43 states have call successors, (43), 12 states have call predecessors, (43), 11 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2021-05-06 02:31:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2021-05-06 02:31:00,948 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 62 [2021-05-06 02:31:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:00,948 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2021-05-06 02:31:00,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2021-05-06 02:31:00,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-06 02:31:00,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:00,949 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:01,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-06 02:31:01,157 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:01,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:01,157 INFO L82 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2021-05-06 02:31:01,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:01,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086304581] [2021-05-06 02:31:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:01,164 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:01,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746017976] [2021-05-06 02:31:01,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:31:01,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:01,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-05-06 02:31:01,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:01,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086304581] [2021-05-06 02:31:01,385 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:01,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746017976] [2021-05-06 02:31:01,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746017976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:01,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:01,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:31:01,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895358576] [2021-05-06 02:31:01,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:31:01,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:01,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:31:01,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:01,387 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:01,471 INFO L93 Difference]: Finished difference Result 245 states and 345 transitions. [2021-05-06 02:31:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2021-05-06 02:31:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:01,473 INFO L225 Difference]: With dead ends: 245 [2021-05-06 02:31:01,473 INFO L226 Difference]: Without dead ends: 169 [2021-05-06 02:31:01,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-06 02:31:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-05-06 02:31:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 108 states have internal predecessors, (130), 46 states have call successors, (46), 16 states have call predecessors, (46), 15 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2021-05-06 02:31:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 220 transitions. [2021-05-06 02:31:01,487 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 220 transitions. Word has length 66 [2021-05-06 02:31:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:01,488 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 220 transitions. [2021-05-06 02:31:01,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 02:31:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 220 transitions. [2021-05-06 02:31:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 02:31:01,489 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:01,489 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:01,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 02:31:01,715 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:01,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:01,715 INFO L82 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2021-05-06 02:31:01,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:01,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574260977] [2021-05-06 02:31:01,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:01,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:01,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1579511755] [2021-05-06 02:31:01,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:01,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:31:01,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:01,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-06 02:31:01,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:01,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574260977] [2021-05-06 02:31:01,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:01,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579511755] [2021-05-06 02:31:01,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579511755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:01,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:01,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:01,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799351071] [2021-05-06 02:31:01,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:01,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:01,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:01,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:01,937 INFO L87 Difference]: Start difference. First operand 167 states and 220 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:31:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:02,091 INFO L93 Difference]: Finished difference Result 214 states and 296 transitions. [2021-05-06 02:31:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:31:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 68 [2021-05-06 02:31:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:02,093 INFO L225 Difference]: With dead ends: 214 [2021-05-06 02:31:02,093 INFO L226 Difference]: Without dead ends: 211 [2021-05-06 02:31:02,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:02,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-06 02:31:02,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 208. [2021-05-06 02:31:02,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 126 states have (on average 1.2857142857142858) internal successors, (162), 132 states have internal predecessors, (162), 65 states have call successors, (65), 17 states have call predecessors, (65), 16 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:31:02,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 289 transitions. [2021-05-06 02:31:02,127 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 289 transitions. Word has length 68 [2021-05-06 02:31:02,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:02,127 INFO L480 AbstractCegarLoop]: Abstraction has 208 states and 289 transitions. [2021-05-06 02:31:02,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-05-06 02:31:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 289 transitions. [2021-05-06 02:31:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 02:31:02,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:02,128 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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 02:31:02,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 02:31:02,345 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 2 times [2021-05-06 02:31:02,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:02,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192894170] [2021-05-06 02:31:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:02,352 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:02,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833064593] [2021-05-06 02:31:02,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:02,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:02,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:02,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-06 02:31:02,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:02,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:02,707 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-06 02:31:02,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:02,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192894170] [2021-05-06 02:31:02,707 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:02,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833064593] [2021-05-06 02:31:02,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833064593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:02,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:02,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:31:02,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891215009] [2021-05-06 02:31:02,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:31:02,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:02,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:31:02,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:02,709 INFO L87 Difference]: Start difference. First operand 208 states and 289 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:31:02,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:02,990 INFO L93 Difference]: Finished difference Result 216 states and 296 transitions. [2021-05-06 02:31:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:02,991 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2021-05-06 02:31:02,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:02,992 INFO L225 Difference]: With dead ends: 216 [2021-05-06 02:31:02,992 INFO L226 Difference]: Without dead ends: 214 [2021-05-06 02:31:02,993 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:02,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-06 02:31:03,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2021-05-06 02:31:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 129 states have (on average 1.2790697674418605) internal successors, (165), 135 states have internal predecessors, (165), 65 states have call successors, (65), 18 states have call predecessors, (65), 17 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:31:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 292 transitions. [2021-05-06 02:31:03,009 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 292 transitions. Word has length 73 [2021-05-06 02:31:03,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:03,010 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 292 transitions. [2021-05-06 02:31:03,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 02:31:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 292 transitions. [2021-05-06 02:31:03,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 02:31:03,011 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:03,011 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:03,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:03,228 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:03,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:03,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 3 times [2021-05-06 02:31:03,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:03,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493022982] [2021-05-06 02:31:03,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:03,235 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:03,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [598059803] [2021-05-06 02:31:03,235 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:03,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:31:03,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 46 conjunts are in the unsatisfiable core [2021-05-06 02:31:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:03,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:03,827 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-06 02:31:03,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493022982] [2021-05-06 02:31:03,827 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:03,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598059803] [2021-05-06 02:31:03,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598059803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:03,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:03,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:31:03,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970007825] [2021-05-06 02:31:03,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:31:03,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:03,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:31:03,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:03,829 INFO L87 Difference]: Start difference. First operand 212 states and 292 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:31:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:04,251 INFO L93 Difference]: Finished difference Result 224 states and 302 transitions. [2021-05-06 02:31:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:31:04,252 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2021-05-06 02:31:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:04,254 INFO L225 Difference]: With dead ends: 224 [2021-05-06 02:31:04,254 INFO L226 Difference]: Without dead ends: 222 [2021-05-06 02:31:04,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 325.6ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:31:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-06 02:31:04,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 220. [2021-05-06 02:31:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 135 states have (on average 1.2666666666666666) internal successors, (171), 141 states have internal predecessors, (171), 65 states have call successors, (65), 20 states have call predecessors, (65), 19 states have return successors, (62), 58 states have call predecessors, (62), 62 states have call successors, (62) [2021-05-06 02:31:04,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 298 transitions. [2021-05-06 02:31:04,277 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 298 transitions. Word has length 78 [2021-05-06 02:31:04,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:04,278 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 298 transitions. [2021-05-06 02:31:04,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 12 states have internal predecessors, (31), 6 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-06 02:31:04,278 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 298 transitions. [2021-05-06 02:31:04,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-06 02:31:04,279 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:04,279 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:04,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-06 02:31:04,493 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:04,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:04,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 2 times [2021-05-06 02:31:04,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:04,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501981277] [2021-05-06 02:31:04,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:04,501 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:04,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [707985601] [2021-05-06 02:31:04,501 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:04,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:04,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:04,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 02:31:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:04,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:04,780 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 27 proven. 23 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-05-06 02:31:04,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:04,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501981277] [2021-05-06 02:31:04,781 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:04,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707985601] [2021-05-06 02:31:04,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707985601] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:04,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:04,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:31:04,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175338547] [2021-05-06 02:31:04,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:31:04,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:04,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:31:04,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:04,794 INFO L87 Difference]: Start difference. First operand 220 states and 298 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:05,000 INFO L93 Difference]: Finished difference Result 285 states and 407 transitions. [2021-05-06 02:31:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:31:05,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 82 [2021-05-06 02:31:05,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:05,004 INFO L225 Difference]: With dead ends: 285 [2021-05-06 02:31:05,004 INFO L226 Difference]: Without dead ends: 283 [2021-05-06 02:31:05,005 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-06 02:31:05,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-05-06 02:31:05,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 253. [2021-05-06 02:31:05,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 150 states have (on average 1.2933333333333332) internal successors, (194), 157 states have internal predecessors, (194), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 02:31:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 355 transitions. [2021-05-06 02:31:05,033 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 355 transitions. Word has length 82 [2021-05-06 02:31:05,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:05,033 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 355 transitions. [2021-05-06 02:31:05,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 355 transitions. [2021-05-06 02:31:05,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-05-06 02:31:05,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:05,035 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1, 1] [2021-05-06 02:31:05,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:05,253 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:05,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:05,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2021-05-06 02:31:05,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:05,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11352273] [2021-05-06 02:31:05,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:05,260 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:05,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187389096] [2021-05-06 02:31:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:05,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 02:31:05,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:05,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:05,478 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:31:05,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:05,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11352273] [2021-05-06 02:31:05,479 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:05,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187389096] [2021-05-06 02:31:05,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187389096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:05,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:05,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:31:05,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821561650] [2021-05-06 02:31:05,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:31:05,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:05,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:31:05,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:05,481 INFO L87 Difference]: Start difference. First operand 253 states and 355 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:05,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:05,576 INFO L93 Difference]: Finished difference Result 263 states and 365 transitions. [2021-05-06 02:31:05,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:05,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2021-05-06 02:31:05,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:05,578 INFO L225 Difference]: With dead ends: 263 [2021-05-06 02:31:05,579 INFO L226 Difference]: Without dead ends: 256 [2021-05-06 02:31:05,579 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:05,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-06 02:31:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2021-05-06 02:31:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 160 states have internal predecessors, (197), 82 states have call successors, (82), 21 states have call predecessors, (82), 20 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2021-05-06 02:31:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 358 transitions. [2021-05-06 02:31:05,610 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 358 transitions. Word has length 83 [2021-05-06 02:31:05,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:05,611 INFO L480 AbstractCegarLoop]: Abstraction has 256 states and 358 transitions. [2021-05-06 02:31:05,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:05,611 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 358 transitions. [2021-05-06 02:31:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-06 02:31:05,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:05,612 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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, 1] [2021-05-06 02:31:05,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-06 02:31:05,837 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:05,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2021-05-06 02:31:05,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:05,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009839521] [2021-05-06 02:31:05,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:05,844 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:05,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1294893868] [2021-05-06 02:31:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:05,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-06 02:31:05,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:06,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,124 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-05-06 02:31:06,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:06,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009839521] [2021-05-06 02:31:06,125 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:06,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294893868] [2021-05-06 02:31:06,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294893868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:06,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:06,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:31:06,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130625980] [2021-05-06 02:31:06,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:31:06,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:06,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:31:06,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:06,127 INFO L87 Difference]: Start difference. First operand 256 states and 358 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:06,394 INFO L93 Difference]: Finished difference Result 289 states and 411 transitions. [2021-05-06 02:31:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 02:31:06,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2021-05-06 02:31:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:06,397 INFO L225 Difference]: With dead ends: 289 [2021-05-06 02:31:06,397 INFO L226 Difference]: Without dead ends: 286 [2021-05-06 02:31:06,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-06 02:31:06,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-06 02:31:06,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 168 states have (on average 1.3035714285714286) internal successors, (219), 176 states have internal predecessors, (219), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-05-06 02:31:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 406 transitions. [2021-05-06 02:31:06,440 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 406 transitions. Word has length 84 [2021-05-06 02:31:06,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:06,441 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 406 transitions. [2021-05-06 02:31:06,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:06,442 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 406 transitions. [2021-05-06 02:31:06,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-05-06 02:31:06,443 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:06,443 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:06,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-06 02:31:06,669 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:06,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:06,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 2 times [2021-05-06 02:31:06,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:06,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940461464] [2021-05-06 02:31:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:06,676 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:06,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21163959] [2021-05-06 02:31:06,677 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:06,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:06,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:06,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:31:06,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:06,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,878 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:31:06,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:06,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940461464] [2021-05-06 02:31:06,929 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:06,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21163959] [2021-05-06 02:31:06,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21163959] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:06,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:06,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:06,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930883096] [2021-05-06 02:31:06,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:06,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:06,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:06,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:06,931 INFO L87 Difference]: Start difference. First operand 285 states and 406 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:07,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:07,058 INFO L93 Difference]: Finished difference Result 333 states and 453 transitions. [2021-05-06 02:31:07,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:07,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 87 [2021-05-06 02:31:07,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:07,061 INFO L225 Difference]: With dead ends: 333 [2021-05-06 02:31:07,061 INFO L226 Difference]: Without dead ends: 324 [2021-05-06 02:31:07,061 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:07,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-05-06 02:31:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2021-05-06 02:31:07,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 196 states have (on average 1.2653061224489797) internal successors, (248), 203 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 02:31:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 441 transitions. [2021-05-06 02:31:07,087 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 441 transitions. Word has length 87 [2021-05-06 02:31:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:07,087 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 441 transitions. [2021-05-06 02:31:07,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 441 transitions. [2021-05-06 02:31:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 02:31:07,088 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:07,088 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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 02:31:07,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-06 02:31:07,315 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:07,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:07,316 INFO L82 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2021-05-06 02:31:07,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:07,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862325148] [2021-05-06 02:31:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:07,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:07,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [836644121] [2021-05-06 02:31:07,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:07,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:07,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-06 02:31:07,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:07,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:07,565 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-05-06 02:31:07,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862325148] [2021-05-06 02:31:07,566 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:07,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836644121] [2021-05-06 02:31:07,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836644121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:07,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:07,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:07,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356679189] [2021-05-06 02:31:07,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:07,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:07,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:07,568 INFO L87 Difference]: Start difference. First operand 323 states and 441 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:07,709 INFO L93 Difference]: Finished difference Result 452 states and 648 transitions. [2021-05-06 02:31:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2021-05-06 02:31:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:07,712 INFO L225 Difference]: With dead ends: 452 [2021-05-06 02:31:07,712 INFO L226 Difference]: Without dead ends: 325 [2021-05-06 02:31:07,713 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-05-06 02:31:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2021-05-06 02:31:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 205 states have internal predecessors, (248), 98 states have call successors, (98), 29 states have call predecessors, (98), 28 states have return successors, (95), 90 states have call predecessors, (95), 95 states have call successors, (95) [2021-05-06 02:31:07,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 441 transitions. [2021-05-06 02:31:07,742 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 441 transitions. Word has length 89 [2021-05-06 02:31:07,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:07,742 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 441 transitions. [2021-05-06 02:31:07,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-06 02:31:07,742 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 441 transitions. [2021-05-06 02:31:07,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-05-06 02:31:07,744 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:07,744 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:07,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-06 02:31:07,969 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:07,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash 325787368, now seen corresponding path program 2 times [2021-05-06 02:31:07,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:07,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488260389] [2021-05-06 02:31:07,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:07,976 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:07,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1070627839] [2021-05-06 02:31:07,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:08,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:08,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:08,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-06 02:31:08,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:08,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-05-06 02:31:08,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:08,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488260389] [2021-05-06 02:31:08,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:08,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070627839] [2021-05-06 02:31:08,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070627839] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 02:31:08,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 02:31:08,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 02:31:08,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609444868] [2021-05-06 02:31:08,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 02:31:08,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:08,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 02:31:08,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 02:31:08,223 INFO L87 Difference]: Start difference. First operand 325 states and 441 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:31:08,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:08,312 INFO L93 Difference]: Finished difference Result 524 states and 770 transitions. [2021-05-06 02:31:08,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 02:31:08,313 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 93 [2021-05-06 02:31:08,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:08,316 INFO L225 Difference]: With dead ends: 524 [2021-05-06 02:31:08,316 INFO L226 Difference]: Without dead ends: 427 [2021-05-06 02:31:08,317 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-05-06 02:31:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 361. [2021-05-06 02:31:08,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 222 states have (on average 1.2657657657657657) internal successors, (281), 229 states have internal predecessors, (281), 110 states have call successors, (110), 29 states have call predecessors, (110), 28 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:31:08,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 498 transitions. [2021-05-06 02:31:08,348 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 498 transitions. Word has length 93 [2021-05-06 02:31:08,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:08,348 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 498 transitions. [2021-05-06 02:31:08,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:31:08,348 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 498 transitions. [2021-05-06 02:31:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-05-06 02:31:08,350 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:08,350 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:08,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-06 02:31:08,573 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:08,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2021-05-06 02:31:08,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:08,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685324108] [2021-05-06 02:31:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:08,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:08,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827070755] [2021-05-06 02:31:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:08,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 65 conjunts are in the unsatisfiable core [2021-05-06 02:31:08,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:08,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:08,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 44 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-05-06 02:31:09,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:09,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685324108] [2021-05-06 02:31:09,211 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:09,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827070755] [2021-05-06 02:31:09,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827070755] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:09,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:09,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:31:09,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067708227] [2021-05-06 02:31:09,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:31:09,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:09,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:31:09,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:09,212 INFO L87 Difference]: Start difference. First operand 361 states and 498 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:31:09,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:09,741 INFO L93 Difference]: Finished difference Result 369 states and 505 transitions. [2021-05-06 02:31:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 02:31:09,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2021-05-06 02:31:09,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:09,744 INFO L225 Difference]: With dead ends: 369 [2021-05-06 02:31:09,744 INFO L226 Difference]: Without dead ends: 367 [2021-05-06 02:31:09,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:31:09,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-06 02:31:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 365. [2021-05-06 02:31:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 225 states have (on average 1.2622222222222221) internal successors, (284), 232 states have internal predecessors, (284), 110 states have call successors, (110), 30 states have call predecessors, (110), 29 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:31:09,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 501 transitions. [2021-05-06 02:31:09,775 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 501 transitions. Word has length 101 [2021-05-06 02:31:09,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:09,775 INFO L480 AbstractCegarLoop]: Abstraction has 365 states and 501 transitions. [2021-05-06 02:31:09,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:31:09,775 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 501 transitions. [2021-05-06 02:31:09,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-06 02:31:09,776 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:09,776 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-05-06 02:31:09,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:09,993 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:09,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:09,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 3 times [2021-05-06 02:31:09,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:09,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241675816] [2021-05-06 02:31:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:09,998 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:09,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905066150] [2021-05-06 02:31:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:10,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:31:10,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:10,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-06 02:31:10,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:10,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 02:31:10,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:10,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241675816] [2021-05-06 02:31:10,239 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:10,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905066150] [2021-05-06 02:31:10,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905066150] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:10,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:10,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:31:10,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230885725] [2021-05-06 02:31:10,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:31:10,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:10,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:31:10,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:10,241 INFO L87 Difference]: Start difference. First operand 365 states and 501 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:31:10,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:10,329 INFO L93 Difference]: Finished difference Result 371 states and 506 transitions. [2021-05-06 02:31:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 02:31:10,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2021-05-06 02:31:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:10,332 INFO L225 Difference]: With dead ends: 371 [2021-05-06 02:31:10,332 INFO L226 Difference]: Without dead ends: 369 [2021-05-06 02:31:10,333 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-05-06 02:31:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2021-05-06 02:31:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 228 states have (on average 1.2587719298245614) internal successors, (287), 235 states have internal predecessors, (287), 110 states have call successors, (110), 31 states have call predecessors, (110), 30 states have return successors, (107), 102 states have call predecessors, (107), 107 states have call successors, (107) [2021-05-06 02:31:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 504 transitions. [2021-05-06 02:31:10,363 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 504 transitions. Word has length 105 [2021-05-06 02:31:10,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:10,363 INFO L480 AbstractCegarLoop]: Abstraction has 369 states and 504 transitions. [2021-05-06 02:31:10,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-06 02:31:10,363 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 504 transitions. [2021-05-06 02:31:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-06 02:31:10,364 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:10,365 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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 02:31:10,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-06 02:31:10,591 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:10,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 2 times [2021-05-06 02:31:10,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:10,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950413410] [2021-05-06 02:31:10,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:10,596 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:10,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2039869407] [2021-05-06 02:31:10,596 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:10,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:10,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:10,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-06 02:31:10,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:10,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:10,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:11,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2021-05-06 02:31:11,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:11,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950413410] [2021-05-06 02:31:11,024 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:11,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039869407] [2021-05-06 02:31:11,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039869407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:11,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:11,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-06 02:31:11,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013569856] [2021-05-06 02:31:11,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-06 02:31:11,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:11,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-06 02:31:11,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:11,028 INFO L87 Difference]: Start difference. First operand 369 states and 504 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:31:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:11,586 INFO L93 Difference]: Finished difference Result 403 states and 557 transitions. [2021-05-06 02:31:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:31:11,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2021-05-06 02:31:11,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:11,589 INFO L225 Difference]: With dead ends: 403 [2021-05-06 02:31:11,589 INFO L226 Difference]: Without dead ends: 400 [2021-05-06 02:31:11,589 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 192.9ms TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:31:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-05-06 02:31:11,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 398. [2021-05-06 02:31:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 243 states have (on average 1.2674897119341564) internal successors, (308), 251 states have internal predecessors, (308), 123 states have call successors, (123), 32 states have call predecessors, (123), 31 states have return successors, (120), 114 states have call predecessors, (120), 120 states have call successors, (120) [2021-05-06 02:31:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 551 transitions. [2021-05-06 02:31:11,626 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 551 transitions. Word has length 107 [2021-05-06 02:31:11,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:11,627 INFO L480 AbstractCegarLoop]: Abstraction has 398 states and 551 transitions. [2021-05-06 02:31:11,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2021-05-06 02:31:11,628 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 551 transitions. [2021-05-06 02:31:11,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-06 02:31:11,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:11,630 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:11,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:11,856 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:11,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:11,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 2 times [2021-05-06 02:31:11,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:11,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542971132] [2021-05-06 02:31:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:11,863 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:11,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [642874734] [2021-05-06 02:31:11,863 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:11,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:11,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:11,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:31:11,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:11,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:11,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:11,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:11,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:11,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:11,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:31:12,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542971132] [2021-05-06 02:31:12,157 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:12,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642874734] [2021-05-06 02:31:12,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642874734] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:12,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:12,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:31:12,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887388236] [2021-05-06 02:31:12,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:31:12,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:12,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:31:12,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:12,158 INFO L87 Difference]: Start difference. First operand 398 states and 551 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:31:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:12,317 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2021-05-06 02:31:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:31:12,318 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2021-05-06 02:31:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:12,320 INFO L225 Difference]: With dead ends: 459 [2021-05-06 02:31:12,320 INFO L226 Difference]: Without dead ends: 450 [2021-05-06 02:31:12,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-06 02:31:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 449. [2021-05-06 02:31:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 280 states have (on average 1.2357142857142858) internal successors, (346), 288 states have internal predecessors, (346), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (124), 118 states have call predecessors, (124), 124 states have call successors, (124) [2021-05-06 02:31:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 597 transitions. [2021-05-06 02:31:12,356 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 597 transitions. Word has length 110 [2021-05-06 02:31:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:12,356 INFO L480 AbstractCegarLoop]: Abstraction has 449 states and 597 transitions. [2021-05-06 02:31:12,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:31:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 597 transitions. [2021-05-06 02:31:12,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-06 02:31:12,357 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:12,357 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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, 1] [2021-05-06 02:31:12,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-06 02:31:12,577 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:12,577 INFO L82 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 3 times [2021-05-06 02:31:12,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:12,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564496351] [2021-05-06 02:31:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:12,586 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:12,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046371558] [2021-05-06 02:31:12,586 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:12,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:31:12,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 02:31:12,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:12,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-06 02:31:12,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564496351] [2021-05-06 02:31:12,826 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:12,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046371558] [2021-05-06 02:31:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046371558] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:12,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:12,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 02:31:12,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746576001] [2021-05-06 02:31:12,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 02:31:12,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 02:31:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 02:31:12,827 INFO L87 Difference]: Start difference. First operand 449 states and 597 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:31:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:13,115 INFO L93 Difference]: Finished difference Result 633 states and 901 transitions. [2021-05-06 02:31:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:31:13,116 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2021-05-06 02:31:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:13,119 INFO L225 Difference]: With dead ends: 633 [2021-05-06 02:31:13,119 INFO L226 Difference]: Without dead ends: 625 [2021-05-06 02:31:13,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:31:13,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-05-06 02:31:13,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 488. [2021-05-06 02:31:13,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 307 states have (on average 1.250814332247557) internal successors, (384), 315 states have internal predecessors, (384), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 02:31:13,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 659 transitions. [2021-05-06 02:31:13,160 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 659 transitions. Word has length 111 [2021-05-06 02:31:13,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:13,160 INFO L480 AbstractCegarLoop]: Abstraction has 488 states and 659 transitions. [2021-05-06 02:31:13,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-06 02:31:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 659 transitions. [2021-05-06 02:31:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-06 02:31:13,161 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:13,162 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:13,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-06 02:31:13,377 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:13,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:13,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 2 times [2021-05-06 02:31:13,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:13,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763477214] [2021-05-06 02:31:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:13,383 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:13,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20448539] [2021-05-06 02:31:13,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:13,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:13,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:13,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 02:31:13,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:13,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:31:13,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:13,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763477214] [2021-05-06 02:31:13,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:13,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20448539] [2021-05-06 02:31:13,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20448539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:13,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:13,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 02:31:13,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194994919] [2021-05-06 02:31:13,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 02:31:13,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:13,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 02:31:13,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-06 02:31:13,642 INFO L87 Difference]: Start difference. First operand 488 states and 659 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:31:13,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:13,819 INFO L93 Difference]: Finished difference Result 681 states and 962 transitions. [2021-05-06 02:31:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:31:13,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2021-05-06 02:31:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:13,822 INFO L225 Difference]: With dead ends: 681 [2021-05-06 02:31:13,822 INFO L226 Difference]: Without dead ends: 490 [2021-05-06 02:31:13,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-06 02:31:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-05-06 02:31:13,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2021-05-06 02:31:13,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 309 states have (on average 1.2394822006472492) internal successors, (383), 317 states have internal predecessors, (383), 139 states have call successors, (139), 42 states have call predecessors, (139), 41 states have return successors, (136), 130 states have call predecessors, (136), 136 states have call successors, (136) [2021-05-06 02:31:13,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 658 transitions. [2021-05-06 02:31:13,858 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 658 transitions. Word has length 112 [2021-05-06 02:31:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:13,858 INFO L480 AbstractCegarLoop]: Abstraction has 490 states and 658 transitions. [2021-05-06 02:31:13,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:31:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 658 transitions. [2021-05-06 02:31:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-06 02:31:13,860 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:13,860 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 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, 1, 1] [2021-05-06 02:31:14,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-06 02:31:14,073 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:14,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:14,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 3 times [2021-05-06 02:31:14,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:14,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012982657] [2021-05-06 02:31:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:14,079 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:14,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599518813] [2021-05-06 02:31:14,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:14,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:31:14,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:14,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:31:14,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:14,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-05-06 02:31:14,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:14,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012982657] [2021-05-06 02:31:14,369 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:14,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599518813] [2021-05-06 02:31:14,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599518813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:14,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:14,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:31:14,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900499833] [2021-05-06 02:31:14,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:31:14,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:14,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:31:14,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:14,370 INFO L87 Difference]: Start difference. First operand 490 states and 658 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:31:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:14,566 INFO L93 Difference]: Finished difference Result 761 states and 1039 transitions. [2021-05-06 02:31:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:31:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2021-05-06 02:31:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:14,569 INFO L225 Difference]: With dead ends: 761 [2021-05-06 02:31:14,569 INFO L226 Difference]: Without dead ends: 570 [2021-05-06 02:31:14,570 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:14,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-05-06 02:31:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2021-05-06 02:31:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 360 states have (on average 1.211111111111111) internal successors, (436), 368 states have internal predecessors, (436), 147 states have call successors, (147), 55 states have call predecessors, (147), 54 states have return successors, (143), 138 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 02:31:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 726 transitions. [2021-05-06 02:31:14,611 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 726 transitions. Word has length 116 [2021-05-06 02:31:14,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:14,611 INFO L480 AbstractCegarLoop]: Abstraction has 562 states and 726 transitions. [2021-05-06 02:31:14,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2021-05-06 02:31:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 726 transitions. [2021-05-06 02:31:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-06 02:31:14,613 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:14,613 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2021-05-06 02:31:14,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-06 02:31:14,829 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 2 times [2021-05-06 02:31:14,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:14,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56592895] [2021-05-06 02:31:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:14,837 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:14,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229872041] [2021-05-06 02:31:14,838 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:14,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:14,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 02:31:14,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:15,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:15,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:15,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-05-06 02:31:15,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:15,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56592895] [2021-05-06 02:31:15,078 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:15,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229872041] [2021-05-06 02:31:15,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229872041] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:15,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:15,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 02:31:15,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736447790] [2021-05-06 02:31:15,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 02:31:15,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:15,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 02:31:15,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 02:31:15,079 INFO L87 Difference]: Start difference. First operand 562 states and 726 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:31:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:15,356 INFO L93 Difference]: Finished difference Result 593 states and 768 transitions. [2021-05-06 02:31:15,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 02:31:15,356 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 118 [2021-05-06 02:31:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:15,362 INFO L225 Difference]: With dead ends: 593 [2021-05-06 02:31:15,362 INFO L226 Difference]: Without dead ends: 590 [2021-05-06 02:31:15,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:15,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-05-06 02:31:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 586. [2021-05-06 02:31:15,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 379 states have (on average 1.2189973614775726) internal successors, (462), 389 states have internal predecessors, (462), 151 states have call successors, (151), 56 states have call predecessors, (151), 55 states have return successors, (147), 140 states have call predecessors, (147), 147 states have call successors, (147) [2021-05-06 02:31:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 760 transitions. [2021-05-06 02:31:15,417 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 760 transitions. Word has length 118 [2021-05-06 02:31:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:15,417 INFO L480 AbstractCegarLoop]: Abstraction has 586 states and 760 transitions. [2021-05-06 02:31:15,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 3 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-05-06 02:31:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 760 transitions. [2021-05-06 02:31:15,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-06 02:31:15,419 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:15,419 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:15,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-06 02:31:15,645 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:15,645 INFO L82 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 3 times [2021-05-06 02:31:15,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:15,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335801274] [2021-05-06 02:31:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:15,651 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:15,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854270292] [2021-05-06 02:31:15,651 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:16,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 02:31:16,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 62 conjunts are in the unsatisfiable core [2021-05-06 02:31:16,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:16,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,977 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-05-06 02:31:16,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:16,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:17,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:17,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:17,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:17,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:17,472 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-05-06 02:31:17,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:17,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:17,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 117 proven. 38 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-05-06 02:31:17,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:17,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335801274] [2021-05-06 02:31:17,609 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:17,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854270292] [2021-05-06 02:31:17,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854270292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:17,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:17,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 02:31:17,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336028160] [2021-05-06 02:31:17,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 02:31:17,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:17,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 02:31:17,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 02:31:17,610 INFO L87 Difference]: Start difference. First operand 586 states and 760 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:31:19,251 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-05-06 02:31:19,654 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-05-06 02:31:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:19,916 INFO L93 Difference]: Finished difference Result 616 states and 796 transitions. [2021-05-06 02:31:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:31:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 124 [2021-05-06 02:31:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:19,920 INFO L225 Difference]: With dead ends: 616 [2021-05-06 02:31:19,920 INFO L226 Difference]: Without dead ends: 612 [2021-05-06 02:31:19,920 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1797.2ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-05-06 02:31:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-05-06 02:31:19,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 587. [2021-05-06 02:31:19,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 383 states have (on average 1.2114882506527416) internal successors, (464), 392 states have internal predecessors, (464), 147 states have call successors, (147), 58 states have call predecessors, (147), 56 states have return successors, (143), 136 states have call predecessors, (143), 143 states have call successors, (143) [2021-05-06 02:31:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 754 transitions. [2021-05-06 02:31:19,969 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 754 transitions. Word has length 124 [2021-05-06 02:31:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:19,969 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 754 transitions. [2021-05-06 02:31:19,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-06 02:31:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 754 transitions. [2021-05-06 02:31:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-05-06 02:31:19,970 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:19,971 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:20,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:20,180 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:20,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:20,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 4 times [2021-05-06 02:31:20,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:20,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590755692] [2021-05-06 02:31:20,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:20,187 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:20,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745330407] [2021-05-06 02:31:20,188 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:20,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:31:20,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:20,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 67 conjunts are in the unsatisfiable core [2021-05-06 02:31:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:20,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 90 proven. 104 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-05-06 02:31:20,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:20,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590755692] [2021-05-06 02:31:20,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:20,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745330407] [2021-05-06 02:31:20,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745330407] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:20,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:20,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-06 02:31:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739654376] [2021-05-06 02:31:20,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-06 02:31:20,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:20,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-06 02:31:20,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:20,703 INFO L87 Difference]: Start difference. First operand 587 states and 754 transitions. Second operand has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-06 02:31:21,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:21,198 INFO L93 Difference]: Finished difference Result 641 states and 820 transitions. [2021-05-06 02:31:21,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-06 02:31:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 123 [2021-05-06 02:31:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:21,202 INFO L225 Difference]: With dead ends: 641 [2021-05-06 02:31:21,202 INFO L226 Difference]: Without dead ends: 639 [2021-05-06 02:31:21,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:31:21,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-05-06 02:31:21,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 633. [2021-05-06 02:31:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 410 states have (on average 1.2097560975609756) internal successors, (496), 420 states have internal predecessors, (496), 160 states have call successors, (160), 64 states have call predecessors, (160), 62 states have return successors, (156), 148 states have call predecessors, (156), 156 states have call successors, (156) [2021-05-06 02:31:21,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 812 transitions. [2021-05-06 02:31:21,255 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 812 transitions. Word has length 123 [2021-05-06 02:31:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:21,255 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 812 transitions. [2021-05-06 02:31:21,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 states have internal predecessors, (38), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2021-05-06 02:31:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 812 transitions. [2021-05-06 02:31:21,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-06 02:31:21,257 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:21,257 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 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] [2021-05-06 02:31:21,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-06 02:31:21,471 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:21,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:21,472 INFO L82 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 5 times [2021-05-06 02:31:21,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:21,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82156493] [2021-05-06 02:31:21,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:21,476 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:21,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076013498] [2021-05-06 02:31:21,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:21,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-06 02:31:21,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:21,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 70 conjunts are in the unsatisfiable core [2021-05-06 02:31:21,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:21,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:21,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:22,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:22,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:22,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:22,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:22,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:22,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:22,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:22,054 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 91 proven. 138 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2021-05-06 02:31:22,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:22,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82156493] [2021-05-06 02:31:22,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:22,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076013498] [2021-05-06 02:31:22,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076013498] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:22,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:22,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:31:22,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291577357] [2021-05-06 02:31:22,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:31:22,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:22,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:31:22,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:31:22,056 INFO L87 Difference]: Start difference. First operand 633 states and 812 transitions. Second operand has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 02:31:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:22,842 INFO L93 Difference]: Finished difference Result 645 states and 823 transitions. [2021-05-06 02:31:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:31:22,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2021-05-06 02:31:22,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:22,846 INFO L225 Difference]: With dead ends: 645 [2021-05-06 02:31:22,846 INFO L226 Difference]: Without dead ends: 643 [2021-05-06 02:31:22,846 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 112 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:31:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-05-06 02:31:22,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 637. [2021-05-06 02:31:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 413 states have (on average 1.208232445520581) internal successors, (499), 423 states have internal predecessors, (499), 160 states have call successors, (160), 65 states have call predecessors, (160), 63 states have return successors, (156), 148 states have call predecessors, (156), 156 states have call successors, (156) [2021-05-06 02:31:22,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 815 transitions. [2021-05-06 02:31:22,899 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 815 transitions. Word has length 128 [2021-05-06 02:31:22,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:22,900 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 815 transitions. [2021-05-06 02:31:22,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2021-05-06 02:31:22,900 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 815 transitions. [2021-05-06 02:31:22,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-06 02:31:22,901 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:22,901 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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 02:31:23,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-06 02:31:23,127 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:23,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:23,128 INFO L82 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 4 times [2021-05-06 02:31:23,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:23,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430503318] [2021-05-06 02:31:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:23,135 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:23,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550255838] [2021-05-06 02:31:23,135 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:23,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:31:23,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:23,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-06 02:31:23,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:23,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 92 proven. 111 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-05-06 02:31:23,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:23,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430503318] [2021-05-06 02:31:23,790 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:23,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550255838] [2021-05-06 02:31:23,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550255838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:23,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:23,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-06 02:31:23,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863188483] [2021-05-06 02:31:23,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:31:23,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:23,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:31:23,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:31:23,794 INFO L87 Difference]: Start difference. First operand 637 states and 815 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-06 02:31:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:24,717 INFO L93 Difference]: Finished difference Result 673 states and 867 transitions. [2021-05-06 02:31:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:31:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 130 [2021-05-06 02:31:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:24,722 INFO L225 Difference]: With dead ends: 673 [2021-05-06 02:31:24,722 INFO L226 Difference]: Without dead ends: 668 [2021-05-06 02:31:24,723 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 393.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:31:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-05-06 02:31:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 641. [2021-05-06 02:31:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 414 states have (on average 1.2053140096618358) internal successors, (499), 425 states have internal predecessors, (499), 162 states have call successors, (162), 65 states have call predecessors, (162), 64 states have return successors, (159), 150 states have call predecessors, (159), 159 states have call successors, (159) [2021-05-06 02:31:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 820 transitions. [2021-05-06 02:31:24,777 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 820 transitions. Word has length 130 [2021-05-06 02:31:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:24,777 INFO L480 AbstractCegarLoop]: Abstraction has 641 states and 820 transitions. [2021-05-06 02:31:24,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 15 states have internal predecessors, (38), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2021-05-06 02:31:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 820 transitions. [2021-05-06 02:31:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-05-06 02:31:24,779 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:24,779 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:24,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:24,989 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:24,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 3 times [2021-05-06 02:31:24,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:24,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33169144] [2021-05-06 02:31:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:24,995 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:24,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [264116667] [2021-05-06 02:31:24,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:25,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-06 02:31:25,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:25,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-06 02:31:25,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:25,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 02:31:25,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33169144] [2021-05-06 02:31:25,364 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264116667] [2021-05-06 02:31:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264116667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:25,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:25,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:31:25,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672978116] [2021-05-06 02:31:25,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:31:25,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:31:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:25,366 INFO L87 Difference]: Start difference. First operand 641 states and 820 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:31:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:25,568 INFO L93 Difference]: Finished difference Result 657 states and 838 transitions. [2021-05-06 02:31:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-06 02:31:25,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2021-05-06 02:31:25,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:25,575 INFO L225 Difference]: With dead ends: 657 [2021-05-06 02:31:25,575 INFO L226 Difference]: Without dead ends: 650 [2021-05-06 02:31:25,576 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-06 02:31:25,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-05-06 02:31:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 650. [2021-05-06 02:31:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 423 states have (on average 1.2009456264775413) internal successors, (508), 434 states have internal predecessors, (508), 162 states have call successors, (162), 65 states have call predecessors, (162), 64 states have return successors, (159), 150 states have call predecessors, (159), 159 states have call successors, (159) [2021-05-06 02:31:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 829 transitions. [2021-05-06 02:31:25,627 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 829 transitions. Word has length 133 [2021-05-06 02:31:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:25,627 INFO L480 AbstractCegarLoop]: Abstraction has 650 states and 829 transitions. [2021-05-06 02:31:25,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:31:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 829 transitions. [2021-05-06 02:31:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-06 02:31:25,628 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:25,629 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:25,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-06 02:31:25,850 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:25,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 5 times [2021-05-06 02:31:25,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:25,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18873237] [2021-05-06 02:31:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:25,855 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:25,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003266102] [2021-05-06 02:31:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:26,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-06 02:31:26,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:26,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 58 conjunts are in the unsatisfiable core [2021-05-06 02:31:26,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:26,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2021-05-06 02:31:26,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:26,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18873237] [2021-05-06 02:31:26,801 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:26,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003266102] [2021-05-06 02:31:26,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003266102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:26,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:26,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:31:26,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846018054] [2021-05-06 02:31:26,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:31:26,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:26,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:31:26,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:31:26,802 INFO L87 Difference]: Start difference. First operand 650 states and 829 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:31:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:27,529 INFO L93 Difference]: Finished difference Result 693 states and 890 transitions. [2021-05-06 02:31:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:31:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 134 [2021-05-06 02:31:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:27,533 INFO L225 Difference]: With dead ends: 693 [2021-05-06 02:31:27,533 INFO L226 Difference]: Without dead ends: 690 [2021-05-06 02:31:27,534 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-05-06 02:31:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-05-06 02:31:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 683. [2021-05-06 02:31:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 441 states have (on average 1.2063492063492063) internal successors, (532), 453 states have internal predecessors, (532), 175 states have call successors, (175), 67 states have call predecessors, (175), 66 states have return successors, (172), 162 states have call predecessors, (172), 172 states have call successors, (172) [2021-05-06 02:31:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 879 transitions. [2021-05-06 02:31:27,593 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 879 transitions. Word has length 134 [2021-05-06 02:31:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:27,594 INFO L480 AbstractCegarLoop]: Abstraction has 683 states and 879 transitions. [2021-05-06 02:31:27,594 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 7 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:31:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 879 transitions. [2021-05-06 02:31:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-05-06 02:31:27,595 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:27,596 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-05-06 02:31:27,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:27,805 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 4 times [2021-05-06 02:31:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:27,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130195809] [2021-05-06 02:31:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:27,810 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:27,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1138772649] [2021-05-06 02:31:27,811 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:27,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:31:27,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:27,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:31:27,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:27,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:27,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:28,136 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-05-06 02:31:28,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:28,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130195809] [2021-05-06 02:31:28,137 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:28,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138772649] [2021-05-06 02:31:28,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138772649] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:28,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:28,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:31:28,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868246012] [2021-05-06 02:31:28,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:31:28,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:28,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:31:28,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:28,140 INFO L87 Difference]: Start difference. First operand 683 states and 879 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:31:28,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:28,411 INFO L93 Difference]: Finished difference Result 1014 states and 1340 transitions. [2021-05-06 02:31:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:31:28,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2021-05-06 02:31:28,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:28,415 INFO L225 Difference]: With dead ends: 1014 [2021-05-06 02:31:28,415 INFO L226 Difference]: Without dead ends: 797 [2021-05-06 02:31:28,417 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:31:28,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-05-06 02:31:28,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 787. [2021-05-06 02:31:28,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 512 states have (on average 1.18359375) internal successors, (606), 522 states have internal predecessors, (606), 192 states have call successors, (192), 84 states have call predecessors, (192), 82 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2021-05-06 02:31:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 986 transitions. [2021-05-06 02:31:28,491 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 986 transitions. Word has length 139 [2021-05-06 02:31:28,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:28,492 INFO L480 AbstractCegarLoop]: Abstraction has 787 states and 986 transitions. [2021-05-06 02:31:28,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2021-05-06 02:31:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 986 transitions. [2021-05-06 02:31:28,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-06 02:31:28,493 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:28,493 INFO L523 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:28,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-06 02:31:28,715 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:28,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:28,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 6 times [2021-05-06 02:31:28,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:28,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120199628] [2021-05-06 02:31:28,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:28,723 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:28,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637245257] [2021-05-06 02:31:28,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:29,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 02:31:29,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-06 02:31:29,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:29,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-05-06 02:31:29,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:29,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120199628] [2021-05-06 02:31:29,738 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:29,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637245257] [2021-05-06 02:31:29,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637245257] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:29,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:29,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:31:29,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441172579] [2021-05-06 02:31:29,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-06 02:31:29,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:29,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-06 02:31:29,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:31:29,739 INFO L87 Difference]: Start difference. First operand 787 states and 986 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:31:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:30,635 INFO L93 Difference]: Finished difference Result 909 states and 1167 transitions. [2021-05-06 02:31:30,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:31:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 146 [2021-05-06 02:31:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:30,638 INFO L225 Difference]: With dead ends: 909 [2021-05-06 02:31:30,638 INFO L226 Difference]: Without dead ends: 907 [2021-05-06 02:31:30,639 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-05-06 02:31:30,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-05-06 02:31:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 891. [2021-05-06 02:31:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 572 states have (on average 1.2062937062937062) internal successors, (690), 585 states have internal predecessors, (690), 231 states have call successors, (231), 89 states have call predecessors, (231), 87 states have return successors, (227), 216 states have call predecessors, (227), 227 states have call successors, (227) [2021-05-06 02:31:30,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1148 transitions. [2021-05-06 02:31:30,713 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1148 transitions. Word has length 146 [2021-05-06 02:31:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:30,713 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 1148 transitions. [2021-05-06 02:31:30,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-06 02:31:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1148 transitions. [2021-05-06 02:31:30,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 02:31:30,715 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:30,715 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:30,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-06 02:31:30,923 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:30,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:30,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 7 times [2021-05-06 02:31:30,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:30,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612976650] [2021-05-06 02:31:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:30,931 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:30,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660939139] [2021-05-06 02:31:30,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:31,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 111 conjunts are in the unsatisfiable core [2021-05-06 02:31:31,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:31,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:31,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,587 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 44 [2021-05-06 02:31:32,785 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2021-05-06 02:31:32,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:32,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 240 proven. 147 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-06 02:31:33,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612976650] [2021-05-06 02:31:33,178 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:33,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660939139] [2021-05-06 02:31:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660939139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:33,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-05-06 02:31:33,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106592994] [2021-05-06 02:31:33,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-06 02:31:33,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-06 02:31:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-06 02:31:33,179 INFO L87 Difference]: Start difference. First operand 891 states and 1148 transitions. Second operand has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) [2021-05-06 02:31:36,150 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-05-06 02:31:36,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:36,686 INFO L93 Difference]: Finished difference Result 953 states and 1220 transitions. [2021-05-06 02:31:36,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-06 02:31:36,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) Word has length 151 [2021-05-06 02:31:36,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:36,690 INFO L225 Difference]: With dead ends: 953 [2021-05-06 02:31:36,690 INFO L226 Difference]: Without dead ends: 951 [2021-05-06 02:31:36,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 126 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2191.0ms TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2021-05-06 02:31:36,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-05-06 02:31:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 945. [2021-05-06 02:31:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 605 states have (on average 1.203305785123967) internal successors, (728), 619 states have internal predecessors, (728), 244 states have call successors, (244), 97 states have call predecessors, (244), 95 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:31:36,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1212 transitions. [2021-05-06 02:31:36,776 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1212 transitions. Word has length 151 [2021-05-06 02:31:36,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:36,776 INFO L480 AbstractCegarLoop]: Abstraction has 945 states and 1212 transitions. [2021-05-06 02:31:36,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 16 states have internal predecessors, (44), 12 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 13 states have call predecessors, (24), 12 states have call successors, (24) [2021-05-06 02:31:36,776 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1212 transitions. [2021-05-06 02:31:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-05-06 02:31:36,778 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:36,778 INFO L523 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:36,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-06 02:31:36,985 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:36,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:36,986 INFO L82 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 8 times [2021-05-06 02:31:36,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:36,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730114876] [2021-05-06 02:31:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:36,991 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:36,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508479018] [2021-05-06 02:31:36,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:37,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 02:31:37,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:37,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-06 02:31:37,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:37,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 77 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2021-05-06 02:31:37,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:37,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730114876] [2021-05-06 02:31:37,556 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:37,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508479018] [2021-05-06 02:31:37,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508479018] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:37,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:37,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-06 02:31:37,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318181735] [2021-05-06 02:31:37,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-06 02:31:37,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:37,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-06 02:31:37,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:31:37,557 INFO L87 Difference]: Start difference. First operand 945 states and 1212 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 02:31:38,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:38,547 INFO L93 Difference]: Finished difference Result 957 states and 1223 transitions. [2021-05-06 02:31:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-06 02:31:38,548 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) Word has length 151 [2021-05-06 02:31:38,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:38,551 INFO L225 Difference]: With dead ends: 957 [2021-05-06 02:31:38,551 INFO L226 Difference]: Without dead ends: 955 [2021-05-06 02:31:38,551 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-05-06 02:31:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-05-06 02:31:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 949. [2021-05-06 02:31:38,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 608 states have (on average 1.2023026315789473) internal successors, (731), 622 states have internal predecessors, (731), 244 states have call successors, (244), 98 states have call predecessors, (244), 96 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:31:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1215 transitions. [2021-05-06 02:31:38,636 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1215 transitions. Word has length 151 [2021-05-06 02:31:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:38,636 INFO L480 AbstractCegarLoop]: Abstraction has 949 states and 1215 transitions. [2021-05-06 02:31:38,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 7 states have call successors, (24) [2021-05-06 02:31:38,637 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1215 transitions. [2021-05-06 02:31:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-05-06 02:31:38,638 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:38,638 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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 02:31:38,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-05-06 02:31:38,861 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:38,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:38,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 6 times [2021-05-06 02:31:38,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:38,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074736673] [2021-05-06 02:31:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:38,866 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:38,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1743037127] [2021-05-06 02:31:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:38,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-06 02:31:38,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:38,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-06 02:31:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:39,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,228 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 87 proven. 29 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2021-05-06 02:31:39,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:39,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074736673] [2021-05-06 02:31:39,229 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:39,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743037127] [2021-05-06 02:31:39,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743037127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:39,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:39,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 02:31:39,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249305045] [2021-05-06 02:31:39,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 02:31:39,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:39,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 02:31:39,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 02:31:39,230 INFO L87 Difference]: Start difference. First operand 949 states and 1215 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 02:31:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:39,523 INFO L93 Difference]: Finished difference Result 977 states and 1239 transitions. [2021-05-06 02:31:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 02:31:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 153 [2021-05-06 02:31:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:39,528 INFO L225 Difference]: With dead ends: 977 [2021-05-06 02:31:39,528 INFO L226 Difference]: Without dead ends: 971 [2021-05-06 02:31:39,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-06 02:31:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-05-06 02:31:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 962. [2021-05-06 02:31:39,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 618 states have (on average 1.1941747572815533) internal successors, (738), 632 states have internal predecessors, (738), 243 states have call successors, (243), 101 states have call predecessors, (243), 100 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:31:39,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1221 transitions. [2021-05-06 02:31:39,615 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1221 transitions. Word has length 153 [2021-05-06 02:31:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:39,616 INFO L480 AbstractCegarLoop]: Abstraction has 962 states and 1221 transitions. [2021-05-06 02:31:39,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-05-06 02:31:39,616 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1221 transitions. [2021-05-06 02:31:39,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-06 02:31:39,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:39,618 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 02:31:39,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:39,833 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:39,833 INFO L82 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 4 times [2021-05-06 02:31:39,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:39,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073925185] [2021-05-06 02:31:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:39,838 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:39,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615607779] [2021-05-06 02:31:39,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:39,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 02:31:39,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 02:31:39,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 02:31:39,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:39,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:39,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 02:31:40,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:40,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073925185] [2021-05-06 02:31:40,165 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:40,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615607779] [2021-05-06 02:31:40,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615607779] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:40,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:40,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 02:31:40,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571992034] [2021-05-06 02:31:40,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 02:31:40,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:40,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 02:31:40,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-06 02:31:40,167 INFO L87 Difference]: Start difference. First operand 962 states and 1221 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 02:31:40,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:40,406 INFO L93 Difference]: Finished difference Result 981 states and 1243 transitions. [2021-05-06 02:31:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-06 02:31:40,407 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2021-05-06 02:31:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:40,411 INFO L225 Difference]: With dead ends: 981 [2021-05-06 02:31:40,411 INFO L226 Difference]: Without dead ends: 974 [2021-05-06 02:31:40,412 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-05-06 02:31:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-05-06 02:31:40,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 974. [2021-05-06 02:31:40,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 974 states, 630 states have (on average 1.1904761904761905) internal successors, (750), 644 states have internal predecessors, (750), 243 states have call successors, (243), 101 states have call predecessors, (243), 100 states have return successors, (240), 228 states have call predecessors, (240), 240 states have call successors, (240) [2021-05-06 02:31:40,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 974 states to 974 states and 1233 transitions. [2021-05-06 02:31:40,495 INFO L78 Accepts]: Start accepts. Automaton has 974 states and 1233 transitions. Word has length 156 [2021-05-06 02:31:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:40,496 INFO L480 AbstractCegarLoop]: Abstraction has 974 states and 1233 transitions. [2021-05-06 02:31:40,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2021-05-06 02:31:40,496 INFO L276 IsEmpty]: Start isEmpty. Operand 974 states and 1233 transitions. [2021-05-06 02:31:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-05-06 02:31:40,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 02:31:40,498 INFO L523 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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 02:31:40,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-06 02:31:40,713 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 02:31:40,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 02:31:40,713 INFO L82 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 7 times [2021-05-06 02:31:40,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 02:31:40,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103858077] [2021-05-06 02:31:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 02:31:40,718 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 02:31:40,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467650337] [2021-05-06 02:31:40,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 02:31:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 02:31:40,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 90 conjunts are in the unsatisfiable core [2021-05-06 02:31:40,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 02:31:41,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 02:31:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 194 proven. 151 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2021-05-06 02:31:41,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 02:31:41,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103858077] [2021-05-06 02:31:41,948 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 02:31:41,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467650337] [2021-05-06 02:31:41,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467650337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 02:31:41,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 02:31:41,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-06 02:31:41,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942764843] [2021-05-06 02:31:41,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-06 02:31:41,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 02:31:41,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-06 02:31:41,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2021-05-06 02:31:41,949 INFO L87 Difference]: Start difference. First operand 974 states and 1233 transitions. Second operand has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:31:43,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 02:31:43,403 INFO L93 Difference]: Finished difference Result 1007 states and 1286 transitions. [2021-05-06 02:31:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 02:31:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 157 [2021-05-06 02:31:43,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 02:31:43,406 INFO L225 Difference]: With dead ends: 1007 [2021-05-06 02:31:43,406 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 02:31:43,408 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1111.4ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-06 02:31:43,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 02:31:43,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 02:31:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 02:31:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 02:31:43,409 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 157 [2021-05-06 02:31:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 02:31:43,409 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 02:31:43,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 10 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2021-05-06 02:31:43,410 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 02:31:43,410 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 02:31:43,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-06 02:31:43,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 02:31:43,937 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 385 DAG size of output: 183 [2021-05-06 02:31:44,294 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 355 DAG size of output: 223 [2021-05-06 02:31:44,555 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 376 DAG size of output: 178 [2021-05-06 02:31:44,870 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 216 [2021-05-06 02:31:45,235 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 214 [2021-05-06 02:31:47,797 WARN L205 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 168 DAG size of output: 33 [2021-05-06 02:31:49,243 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 225 DAG size of output: 35 [2021-05-06 02:31:49,673 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 36 [2021-05-06 02:31:50,840 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 163 DAG size of output: 33 [2021-05-06 02:31:51,228 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 34 [2021-05-06 02:31:53,030 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 218 DAG size of output: 35 [2021-05-06 02:31:54,540 WARN L205 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 217 DAG size of output: 32 [2021-05-06 02:31:54,587 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2021-05-06 02:31:54,587 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 4) no Hoare annotation was computed. [2021-05-06 02:31:54,587 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2021-05-06 02:31:54,587 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= ~counter~0 |old(~counter~0)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L194 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (<= ~counter~0 0) [2021-05-06 02:31:54,588 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 7 9) the Hoare annotation is: true [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point L8(line 8) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point L8-2(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 7 9) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point L25(line 25) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 73) no Hoare annotation was computed. [2021-05-06 02:31:54,588 INFO L198 CegarLoopUtils]: For program point L50(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0)))) (.cse2 (<= 1 main_~y~0))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) .cse1 .cse2) (and .cse0 (= main_~k~0 0) .cse1 .cse2 (= main_~c~0 main_~a~0)))) [2021-05-06 02:31:54,589 INFO L198 CegarLoopUtils]: For program point L46-1(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:31:54,589 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 73) no Hoare annotation was computed. [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point L46-3(lines 46 55) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~k~0 0) (= main_~c~0 main_~a~0) .cse1))) [2021-05-06 02:31:54,589 INFO L198 CegarLoopUtils]: For program point L46-4(lines 46 55) no Hoare annotation was computed. [2021-05-06 02:31:54,589 INFO L198 CegarLoopUtils]: For program point L40(lines 40 67) no Hoare annotation was computed. [2021-05-06 02:31:54,589 INFO L198 CegarLoopUtils]: For program point L71(line 71) no Hoare annotation was computed. [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point L40-2(lines 38 67) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point L40-3(lines 40 67) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point mainENTRY(lines 19 73) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (= ~counter~0 |old(~counter~0)|)) [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point L24-1(line 24) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (= ~counter~0 |old(~counter~0)|))) [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (<= 1 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) (<= 1 main_~y~0))) [2021-05-06 02:31:54,589 INFO L194 CegarLoopUtils]: At program point L47(line 47) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (and .cse0 (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (not (<= |old(~counter~0)| 0)) (and .cse0 (= main_~k~0 0) (= main_~c~0 main_~a~0) .cse1))) [2021-05-06 02:31:54,590 INFO L194 CegarLoopUtils]: At program point L47-1(line 47) the Hoare annotation is: (let ((.cse0 (<= 1 main_~x~0)) (.cse1 (<= 1 main_~y~0))) (or (not (<= |old(~counter~0)| 0)) (and (= main_~a~0 (+ (* main_~k~0 main_~b~0) main_~c~0)) .cse0 (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (= main_~a~0 (+ (* main_~y~0 main_~r~0) (* main_~x~0 main_~p~0))) .cse1) (and .cse0 (= main_~k~0 0) .cse1 (= main_~c~0 main_~a~0)))) [2021-05-06 02:31:54,590 INFO L198 CegarLoopUtils]: For program point L41(lines 41 42) no Hoare annotation was computed. [2021-05-06 02:31:54,590 INFO L194 CegarLoopUtils]: At program point L70(line 70) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (<= 1 main_~x~0) (<= 1 main_~y~0))) [2021-05-06 02:31:54,590 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (<= 1 main_~b~0) (= ~counter~0 |old(~counter~0)|) (= main_~p~0 1) (= main_~s~0 1))) [2021-05-06 02:31:54,590 INFO L194 CegarLoopUtils]: At program point L37-1(line 37) the Hoare annotation is: (or (not (<= |old(~counter~0)| 0)) (and (= (* main_~y~0 main_~y~0) main_~yy~0) (= (* main_~x~0 main_~y~0) main_~xy~0) (= main_~r~0 0) (<= 1 main_~x~0) (= main_~b~0 main_~y~0) (= main_~a~0 main_~x~0) (= main_~b~0 (+ (* main_~y~0 main_~s~0) (* main_~x~0 main_~q~0))) (< main_~xy~0 2147483647) (<= 1 main_~b~0) (= ~counter~0 |old(~counter~0)|) (= main_~p~0 1) (= main_~s~0 1))) [2021-05-06 02:31:54,590 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 10 16) the Hoare annotation is: true [2021-05-06 02:31:54,590 INFO L198 CegarLoopUtils]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-05-06 02:31:54,590 INFO L198 CegarLoopUtils]: For program point L11(lines 11 14) no Hoare annotation was computed. [2021-05-06 02:31:54,590 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:31:54,590 INFO L198 CegarLoopUtils]: For program point L11-2(lines 10 16) no Hoare annotation was computed. [2021-05-06 02:31:54,590 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2021-05-06 02:31:54,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 02:31:54 BoogieIcfgContainer [2021-05-06 02:31:54,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 02:31:54,604 INFO L168 Benchmark]: Toolchain (without parser) took 61510.66 ms. Allocated memory was 127.9 MB in the beginning and 335.5 MB in the end (delta: 207.6 MB). Free memory was 91.1 MB in the beginning and 273.8 MB in the end (delta: -182.6 MB). Peak memory consumption was 186.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:54,604 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 127.9 MB. Free memory is still 108.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 02:31:54,604 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.60 ms. Allocated memory was 127.9 MB in the beginning and 185.6 MB in the end (delta: 57.7 MB). Free memory was 91.0 MB in the beginning and 167.5 MB in the end (delta: -76.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:54,604 INFO L168 Benchmark]: Boogie Preprocessor took 44.29 ms. Allocated memory is still 185.6 MB. Free memory was 167.2 MB in the beginning and 165.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:54,604 INFO L168 Benchmark]: RCFGBuilder took 468.00 ms. Allocated memory is still 185.6 MB. Free memory was 165.8 MB in the beginning and 148.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:54,605 INFO L168 Benchmark]: TraceAbstraction took 60690.40 ms. Allocated memory was 185.6 MB in the beginning and 335.5 MB in the end (delta: 149.9 MB). Free memory was 148.3 MB in the beginning and 273.8 MB in the end (delta: -125.5 MB). Peak memory consumption was 185.7 MB. Max. memory is 8.0 GB. [2021-05-06 02:31:54,605 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 127.9 MB. Free memory is still 108.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.60 ms. Allocated memory was 127.9 MB in the beginning and 185.6 MB in the end (delta: 57.7 MB). Free memory was 91.0 MB in the beginning and 167.5 MB in the end (delta: -76.5 MB). Peak memory consumption was 16.9 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.29 ms. Allocated memory is still 185.6 MB. Free memory was 167.2 MB in the beginning and 165.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 468.00 ms. Allocated memory is still 185.6 MB. Free memory was 165.8 MB in the beginning and 148.8 MB in the end (delta: 17.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 60690.40 ms. Allocated memory was 185.6 MB in the beginning and 335.5 MB in the end (delta: 149.9 MB). Free memory was 148.3 MB in the beginning and 273.8 MB in the end (delta: -125.5 MB). Peak memory consumption was 185.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 49649.6ms, OverallIterations: 43, TraceHistogramMax: 21, EmptinessCheckTime: 69.5ms, AutomataDifference: 18823.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 10974.8ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2319 SDtfs, 1642 SDslu, 11277 SDs, 0 SdLazy, 10079 SolverSat, 1344 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11697.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4179 GetRequests, 3647 SyntacticMatches, 17 SemanticMatches, 515 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 9793.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=974occurred in iteration=42, InterpolantAutomatonStates: 479, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1550.9ms AutomataMinimizationTime, 43 MinimizatonAttempts, 442 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 18 LocationsWithAnnotation, 640 PreInvPairs, 1013 NumberOfFragments, 451 HoareAnnotationTreeSize, 640 FomulaSimplifications, 344212 FormulaSimplificationTreeSizeReduction, 1997.0ms HoareSimplificationTime, 18 FomulaSimplificationsInter, 19664 FormulaSimplificationTreeSizeReductionInter, 8933.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 522.6ms SsaConstructionTime, 2898.3ms SatisfiabilityAnalysisTime, 14826.2ms InterpolantComputationTime, 4062 NumberOfCodeBlocks, 3702 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 4019 ConstructedInterpolants, 0 QuantifiedInterpolants, 23357 SizeOfPredicates, 281 NumberOfNonLiveVariables, 11975 ConjunctsInSsa, 1249 ConjunctsInUnsatCore, 43 InterpolantComputations, 4 PerfectInterpolantSequences, 9884/13557 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((1 <= x && a == k * b + c) && b == y * s + x * q) && a == y * r + x * p) && 1 <= y) || !(\old(counter) <= 0)) || (((1 <= x && k == 0) && c == a) && 1 <= y) - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: !(\old(counter) <= 0) || (1 <= x && 1 <= y) RESULT: Ultimate proved your program to be correct! Received shutdown request...