/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/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-18 01:11:41,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 01:11:41,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 01:11:41,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 01:11:41,242 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 01:11:41,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 01:11:41,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 01:11:41,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-18 01:11:41,254 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 01:11:41,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 01:11:41,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 01:11:41,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 01:11:41,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 01:11:41,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 01:11:41,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 01:11:41,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 01:11:41,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 01:11:41,256 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 01:11:41,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 01:11:41,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 01:11:41,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 01:11:41,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 01:11:41,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 01:11:41,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:11:41,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 01:11:41,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-18 01:11:41,257 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-18 01:11:41,257 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-18 01:11:41,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 01:11:41,257 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-18 01:11:41,257 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 01:11:41,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 01:11:41,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 01:11:41,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 01:11:41,476 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 01:11:41,476 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 01:11:41,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-03-18 01:11:41,520 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00930fab/bea5e421700147b0b9142d489a67b6e7/FLAG3cb9e01eb [2022-03-18 01:11:41,911 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 01:11:41,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd-ll.c [2022-03-18 01:11:41,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00930fab/bea5e421700147b0b9142d489a67b6e7/FLAG3cb9e01eb [2022-03-18 01:11:41,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d00930fab/bea5e421700147b0b9142d489a67b6e7 [2022-03-18 01:11:41,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 01:11:41,937 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 01:11:41,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 01:11:41,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 01:11:41,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 01:11:41,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:11:41" (1/1) ... [2022-03-18 01:11:41,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@445e43ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:41, skipping insertion in model container [2022-03-18 01:11:41,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 01:11:41" (1/1) ... [2022-03-18 01:11:41,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 01:11:41,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 01:11:42,094 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd-ll.c[489,502] [2022-03-18 01:11:42,115 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:11:42,121 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 01:11:42,129 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd-ll.c[489,502] [2022-03-18 01:11:42,147 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 01:11:42,155 INFO L208 MainTranslator]: Completed translation [2022-03-18 01:11:42,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42 WrapperNode [2022-03-18 01:11:42,156 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 01:11:42,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 01:11:42,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 01:11:42,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 01:11:42,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (1/1) ... [2022-03-18 01:11:42,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (1/1) ... [2022-03-18 01:11:42,170 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (1/1) ... [2022-03-18 01:11:42,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (1/1) ... [2022-03-18 01:11:42,179 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (1/1) ... [2022-03-18 01:11:42,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (1/1) ... [2022-03-18 01:11:42,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (1/1) ... [2022-03-18 01:11:42,188 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 01:11:42,189 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 01:11:42,189 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 01:11:42,189 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 01:11:42,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (1/1) ... [2022-03-18 01:11:42,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 01:11:42,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:42,224 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 01:11:42,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 01:11:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 01:11:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 01:11:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 01:11:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 01:11:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 01:11:42,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 01:11:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 01:11:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 01:11:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 01:11:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 01:11:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 01:11:42,250 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 01:11:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 01:11:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 01:11:42,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 01:11:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 01:11:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 01:11:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 01:11:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 01:11:42,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 01:11:42,298 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 01:11:42,299 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 01:11:42,426 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 01:11:42,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 01:11:42,430 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 01:11:42,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:11:42 BoogieIcfgContainer [2022-03-18 01:11:42,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 01:11:42,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 01:11:42,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 01:11:42,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 01:11:42,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 01:11:41" (1/3) ... [2022-03-18 01:11:42,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7e453d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:11:42, skipping insertion in model container [2022-03-18 01:11:42,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 01:11:42" (2/3) ... [2022-03-18 01:11:42,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a7e453d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 01:11:42, skipping insertion in model container [2022-03-18 01:11:42,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 01:11:42" (3/3) ... [2022-03-18 01:11:42,436 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll.c [2022-03-18 01:11:42,439 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-18 01:11:42,439 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 01:11:42,494 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 01:11:42,499 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 01:11:42,499 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 01:11:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 01:11:42,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 01:11:42,528 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:42,529 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:42,529 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:42,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:42,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 1 times [2022-03-18 01:11:42,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:42,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1712757642] [2022-03-18 01:11:42,556 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:42,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2012836591, now seen corresponding path program 2 times [2022-03-18 01:11:42,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:42,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118565433] [2022-03-18 01:11:42,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:42,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:42,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 01:11:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:42,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 01:11:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:42,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-18 01:11:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 01:11:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 01:11:42,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:42,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118565433] [2022-03-18 01:11:42,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118565433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:42,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:42,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:11:42,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1712757642] [2022-03-18 01:11:42,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1712757642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:42,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:42,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 01:11:42,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901334122] [2022-03-18 01:11:42,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:42,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 01:11:42,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:42,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 01:11:42,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 01:11:42,787 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 01:11:42,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:42,883 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2022-03-18 01:11:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 01:11:42,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 01:11:42,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:42,891 INFO L225 Difference]: With dead ends: 61 [2022-03-18 01:11:42,891 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 01:11:42,894 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 01:11:42,898 INFO L912 BasicCegarLoop]: 33 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:42,900 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 01:11:42,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-18 01:11:42,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 01:11:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-03-18 01:11:42,941 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 22 [2022-03-18 01:11:42,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:42,941 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-03-18 01:11:42,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 01:11:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-03-18 01:11:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 01:11:42,942 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:42,942 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:42,943 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 01:11:42,943 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:42,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 1 times [2022-03-18 01:11:42,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:42,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [661753670] [2022-03-18 01:11:42,946 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:42,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1952740121, now seen corresponding path program 2 times [2022-03-18 01:11:42,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:42,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568360563] [2022-03-18 01:11:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:42,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:42,969 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:42,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740757491] [2022-03-18 01:11:42,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:42,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:42,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:42,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:42,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 01:11:43,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 01:11:43,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:43,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-18 01:11:43,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 01:11:43,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:11:43,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568360563] [2022-03-18 01:11:43,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:43,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740757491] [2022-03-18 01:11:43,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740757491] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:43,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:43,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:11:43,160 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:43,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [661753670] [2022-03-18 01:11:43,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [661753670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:43,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:43,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:11:43,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384770914] [2022-03-18 01:11:43,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:43,161 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:11:43,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:43,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:11:43,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:11:43,162 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 01:11:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:43,202 INFO L93 Difference]: Finished difference Result 45 states and 60 transitions. [2022-03-18 01:11:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:11:43,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-18 01:11:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:43,203 INFO L225 Difference]: With dead ends: 45 [2022-03-18 01:11:43,203 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 01:11:43,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:11:43,205 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:43,205 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:11:43,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 01:11:43,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-03-18 01:11:43,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 01:11:43,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 57 transitions. [2022-03-18 01:11:43,215 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 57 transitions. Word has length 22 [2022-03-18 01:11:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:43,222 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 57 transitions. [2022-03-18 01:11:43,223 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 01:11:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2022-03-18 01:11:43,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-18 01:11:43,223 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:43,224 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:43,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:43,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:43,424 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:43,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:43,425 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 1 times [2022-03-18 01:11:43,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:43,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1897052559] [2022-03-18 01:11:43,426 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:43,426 INFO L85 PathProgramCache]: Analyzing trace with hash 652987931, now seen corresponding path program 2 times [2022-03-18 01:11:43,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:43,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797925111] [2022-03-18 01:11:43,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:43,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:43,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:43,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423258222] [2022-03-18 01:11:43,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:43,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:43,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:43,438 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:43,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 01:11:43,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:43,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 01:11:43,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 01:11:43,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:11:43,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:43,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797925111] [2022-03-18 01:11:43,601 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:43,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423258222] [2022-03-18 01:11:43,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423258222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:43,601 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:43,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:11:43,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:43,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1897052559] [2022-03-18 01:11:43,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1897052559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:43,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:43,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:11:43,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342578354] [2022-03-18 01:11:43,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:43,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:11:43,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:43,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:11:43,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:11:43,604 INFO L87 Difference]: Start difference. First operand 42 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 01:11:43,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:43,714 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-03-18 01:11:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:11:43,714 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-03-18 01:11:43,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:43,716 INFO L225 Difference]: With dead ends: 49 [2022-03-18 01:11:43,717 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 01:11:43,718 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:11:43,726 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:43,727 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 177 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:43,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 01:11:43,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-03-18 01:11:43,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 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) [2022-03-18 01:11:43,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-03-18 01:11:43,737 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 27 [2022-03-18 01:11:43,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:43,738 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-03-18 01:11:43,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-18 01:11:43,738 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-03-18 01:11:43,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 01:11:43,738 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:43,739 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:43,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:43,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 01:11:43,948 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:43,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:43,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 1 times [2022-03-18 01:11:43,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:43,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1944335816] [2022-03-18 01:11:43,949 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:43,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1028398105, now seen corresponding path program 2 times [2022-03-18 01:11:43,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:43,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314060435] [2022-03-18 01:11:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:43,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:43,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:43,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829438824] [2022-03-18 01:11:43,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:43,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:43,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:43,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:43,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 01:11:43,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:43,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:43,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 01:11:43,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-03-18 01:11:44,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:44,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-18 01:11:44,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314060435] [2022-03-18 01:11:44,203 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829438824] [2022-03-18 01:11:44,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829438824] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 01:11:44,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:11:44,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-18 01:11:44,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:44,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1944335816] [2022-03-18 01:11:44,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1944335816] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:44,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:44,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:11:44,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621147938] [2022-03-18 01:11:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:44,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:11:44,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:11:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:11:44,206 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 01:11:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:44,251 INFO L93 Difference]: Finished difference Result 71 states and 100 transitions. [2022-03-18 01:11:44,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:11:44,251 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-18 01:11:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:44,264 INFO L225 Difference]: With dead ends: 71 [2022-03-18 01:11:44,264 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 01:11:44,265 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:11:44,265 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:44,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 136 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:11:44,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 01:11:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-18 01:11:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 28 states have call successors, (28), 7 states have call predecessors, (28), 6 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 01:11:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 93 transitions. [2022-03-18 01:11:44,278 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 93 transitions. Word has length 32 [2022-03-18 01:11:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:44,278 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 93 transitions. [2022-03-18 01:11:44,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-18 01:11:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 93 transitions. [2022-03-18 01:11:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-18 01:11:44,279 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:44,279 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:44,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:44,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:44,480 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:44,480 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 1 times [2022-03-18 01:11:44,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:44,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [144397032] [2022-03-18 01:11:44,481 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:44,481 INFO L85 PathProgramCache]: Analyzing trace with hash -134474469, now seen corresponding path program 2 times [2022-03-18 01:11:44,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:44,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604912274] [2022-03-18 01:11:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:44,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:44,489 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:44,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816187771] [2022-03-18 01:11:44,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:44,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:44,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:44,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:44,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 01:11:44,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:44,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:44,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 01:11:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 01:11:44,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:11:44,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:44,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604912274] [2022-03-18 01:11:44,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:44,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816187771] [2022-03-18 01:11:44,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816187771] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:44,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:44,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:11:44,600 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:44,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [144397032] [2022-03-18 01:11:44,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [144397032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:44,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:44,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:11:44,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024737426] [2022-03-18 01:11:44,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:44,601 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:11:44,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:44,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:11:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:11:44,602 INFO L87 Difference]: Start difference. First operand 67 states and 93 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 01:11:44,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:44,641 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-03-18 01:11:44,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:11:44,641 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-03-18 01:11:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:44,645 INFO L225 Difference]: With dead ends: 73 [2022-03-18 01:11:44,645 INFO L226 Difference]: Without dead ends: 71 [2022-03-18 01:11:44,645 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:11:44,646 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:44,646 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 127 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:11:44,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-18 01:11:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-18 01:11:44,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 28 states have call successors, (28), 8 states have call predecessors, (28), 7 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 01:11:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 96 transitions. [2022-03-18 01:11:44,673 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 96 transitions. Word has length 38 [2022-03-18 01:11:44,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:44,674 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 96 transitions. [2022-03-18 01:11:44,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-03-18 01:11:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 96 transitions. [2022-03-18 01:11:44,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 01:11:44,676 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:44,676 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:44,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:44,893 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:44,893 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:44,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:44,893 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 1 times [2022-03-18 01:11:44,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:44,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19820142] [2022-03-18 01:11:44,894 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:44,894 INFO L85 PathProgramCache]: Analyzing trace with hash 251096952, now seen corresponding path program 2 times [2022-03-18 01:11:44,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:44,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346619135] [2022-03-18 01:11:44,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:44,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:44,902 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:44,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874731425] [2022-03-18 01:11:44,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:44,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:44,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:44,905 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:44,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 01:11:44,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:44,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:44,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 01:11:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 01:11:45,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 01:11:45,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346619135] [2022-03-18 01:11:45,035 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:45,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874731425] [2022-03-18 01:11:45,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874731425] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:45,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:45,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:11:45,036 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:45,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19820142] [2022-03-18 01:11:45,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19820142] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:45,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:45,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:11:45,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661453520] [2022-03-18 01:11:45,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:45,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:11:45,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:45,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:11:45,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 01:11:45,037 INFO L87 Difference]: Start difference. First operand 71 states and 96 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 01:11:45,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:45,081 INFO L93 Difference]: Finished difference Result 81 states and 104 transitions. [2022-03-18 01:11:45,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:11:45,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2022-03-18 01:11:45,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:45,083 INFO L225 Difference]: With dead ends: 81 [2022-03-18 01:11:45,083 INFO L226 Difference]: Without dead ends: 78 [2022-03-18 01:11:45,083 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 01:11:45,085 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:45,085 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 135 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:11:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-18 01:11:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2022-03-18 01:11:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 01:11:45,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-03-18 01:11:45,102 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 40 [2022-03-18 01:11:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:45,102 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-03-18 01:11:45,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 01:11:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-03-18 01:11:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-18 01:11:45,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:45,103 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:45,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:45,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:45,319 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 1 times [2022-03-18 01:11:45,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:45,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [874267209] [2022-03-18 01:11:45,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:45,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1098226535, now seen corresponding path program 2 times [2022-03-18 01:11:45,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:45,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091357279] [2022-03-18 01:11:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:45,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:45,328 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:45,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1548362609] [2022-03-18 01:11:45,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:45,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:45,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:45,329 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:45,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 01:11:45,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:45,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 01:11:45,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:45,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 01:11:45,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 01:11:45,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:45,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091357279] [2022-03-18 01:11:45,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:45,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548362609] [2022-03-18 01:11:45,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548362609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:45,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:45,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-18 01:11:45,581 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:45,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [874267209] [2022-03-18 01:11:45,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [874267209] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:45,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:45,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:11:45,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135378435] [2022-03-18 01:11:45,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:45,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:11:45,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:45,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:11:45,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:11:45,582 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 01:11:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:45,691 INFO L93 Difference]: Finished difference Result 85 states and 107 transitions. [2022-03-18 01:11:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:11:45,691 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 43 [2022-03-18 01:11:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:45,692 INFO L225 Difference]: With dead ends: 85 [2022-03-18 01:11:45,692 INFO L226 Difference]: Without dead ends: 81 [2022-03-18 01:11:45,693 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:11:45,693 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 13 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:45,693 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 146 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-18 01:11:45,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-18 01:11:45,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 25 states have call successors, (25), 11 states have call predecessors, (25), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 01:11:45,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2022-03-18 01:11:45,716 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 43 [2022-03-18 01:11:45,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:45,716 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2022-03-18 01:11:45,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-03-18 01:11:45,716 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2022-03-18 01:11:45,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-18 01:11:45,718 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:45,718 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2022-03-18 01:11:45,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:45,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:45,927 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 3 times [2022-03-18 01:11:45,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:45,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [676093980] [2022-03-18 01:11:45,928 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash -17648356, now seen corresponding path program 4 times [2022-03-18 01:11:45,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:45,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766518125] [2022-03-18 01:11:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:45,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:45,935 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:45,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820384917] [2022-03-18 01:11:45,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:11:45,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:45,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:45,942 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:45,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 01:11:45,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:11:45,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-18 01:11:45,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 01:11:46,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:46,403 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-18 01:11:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:46,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766518125] [2022-03-18 01:11:46,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820384917] [2022-03-18 01:11:46,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820384917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:46,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:46,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-18 01:11:46,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:46,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [676093980] [2022-03-18 01:11:46,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [676093980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:46,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:46,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:11:46,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528756600] [2022-03-18 01:11:46,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:46,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:11:46,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:46,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:11:46,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:11:46,405 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 01:11:46,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:46,572 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-03-18 01:11:46,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 01:11:46,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 45 [2022-03-18 01:11:46,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:46,574 INFO L225 Difference]: With dead ends: 115 [2022-03-18 01:11:46,574 INFO L226 Difference]: Without dead ends: 113 [2022-03-18 01:11:46,574 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-18 01:11:46,575 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 25 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:46,575 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 239 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-18 01:11:46,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2022-03-18 01:11:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 66 states have internal predecessors, (73), 31 states have call successors, (31), 15 states have call predecessors, (31), 14 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-18 01:11:46,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-03-18 01:11:46,585 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 45 [2022-03-18 01:11:46,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:46,586 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-03-18 01:11:46,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-03-18 01:11:46,586 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-03-18 01:11:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-18 01:11:46,587 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:46,587 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 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] [2022-03-18 01:11:46,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:46,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:46,804 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:46,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:46,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 1 times [2022-03-18 01:11:46,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:46,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1634419125] [2022-03-18 01:11:46,805 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:46,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1834363254, now seen corresponding path program 2 times [2022-03-18 01:11:46,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:46,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474455981] [2022-03-18 01:11:46,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:46,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:46,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:46,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42564391] [2022-03-18 01:11:46,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:46,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:46,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:46,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:46,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 01:11:46,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:46,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:46,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 01:11:46,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-03-18 01:11:47,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-18 01:11:47,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:47,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474455981] [2022-03-18 01:11:47,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:47,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42564391] [2022-03-18 01:11:47,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42564391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:47,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:47,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2022-03-18 01:11:47,132 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:47,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1634419125] [2022-03-18 01:11:47,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1634419125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:47,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:47,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:11:47,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999821534] [2022-03-18 01:11:47,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:47,133 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 01:11:47,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:47,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 01:11:47,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:11:47,133 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-18 01:11:47,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:47,238 INFO L93 Difference]: Finished difference Result 134 states and 173 transitions. [2022-03-18 01:11:47,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:11:47,238 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 50 [2022-03-18 01:11:47,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:47,239 INFO L225 Difference]: With dead ends: 134 [2022-03-18 01:11:47,239 INFO L226 Difference]: Without dead ends: 128 [2022-03-18 01:11:47,240 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:11:47,240 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:47,241 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 187 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:47,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-18 01:11:47,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-18 01:11:47,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 72 states have (on average 1.1805555555555556) internal successors, (85), 76 states have internal predecessors, (85), 40 states have call successors, (40), 16 states have call predecessors, (40), 15 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 01:11:47,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2022-03-18 01:11:47,253 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 50 [2022-03-18 01:11:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:47,253 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2022-03-18 01:11:47,254 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-03-18 01:11:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2022-03-18 01:11:47,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 01:11:47,254 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:47,254 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:47,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:47,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 01:11:47,471 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:47,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:47,472 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 1 times [2022-03-18 01:11:47,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:47,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063060259] [2022-03-18 01:11:47,472 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:47,472 INFO L85 PathProgramCache]: Analyzing trace with hash -152607915, now seen corresponding path program 2 times [2022-03-18 01:11:47,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:47,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700862532] [2022-03-18 01:11:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:47,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:47,480 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:47,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852510828] [2022-03-18 01:11:47,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:47,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:47,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:47,481 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:47,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 01:11:47,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:47,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:47,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 01:11:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-18 01:11:47,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-03-18 01:11:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:47,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700862532] [2022-03-18 01:11:47,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:47,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852510828] [2022-03-18 01:11:47,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852510828] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 01:11:47,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:11:47,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-03-18 01:11:47,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:47,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063060259] [2022-03-18 01:11:47,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063060259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:47,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:47,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 01:11:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685546867] [2022-03-18 01:11:47,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:47,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 01:11:47,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:47,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 01:11:47,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-18 01:11:47,804 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 01:11:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:47,855 INFO L93 Difference]: Finished difference Result 134 states and 167 transitions. [2022-03-18 01:11:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 01:11:47,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 58 [2022-03-18 01:11:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:47,857 INFO L225 Difference]: With dead ends: 134 [2022-03-18 01:11:47,857 INFO L226 Difference]: Without dead ends: 129 [2022-03-18 01:11:47,858 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 01:11:47,858 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:47,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 108 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 01:11:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-18 01:11:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-18 01:11:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.16) internal successors, (87), 78 states have internal predecessors, (87), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (35), 33 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-18 01:11:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 159 transitions. [2022-03-18 01:11:47,874 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 159 transitions. Word has length 58 [2022-03-18 01:11:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:47,874 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 159 transitions. [2022-03-18 01:11:47,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-18 01:11:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 159 transitions. [2022-03-18 01:11:47,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 01:11:47,875 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:47,875 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:47,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:48,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 01:11:48,099 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 5 times [2022-03-18 01:11:48,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:48,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37370876] [2022-03-18 01:11:48,100 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1386725923, now seen corresponding path program 6 times [2022-03-18 01:11:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:48,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440673220] [2022-03-18 01:11:48,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:48,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:48,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:48,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389509712] [2022-03-18 01:11:48,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:11:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:48,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:48,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:48,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 01:11:48,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:11:48,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:48,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-18 01:11:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:48,450 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-03-18 01:11:48,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 01:11:48,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:48,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440673220] [2022-03-18 01:11:48,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:48,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389509712] [2022-03-18 01:11:48,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389509712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:48,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:48,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-18 01:11:48,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:48,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37370876] [2022-03-18 01:11:48,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37370876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:48,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:48,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:11:48,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921666362] [2022-03-18 01:11:48,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:48,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:11:48,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:48,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:11:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:11:48,582 INFO L87 Difference]: Start difference. First operand 129 states and 159 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 01:11:48,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:48,734 INFO L93 Difference]: Finished difference Result 163 states and 201 transitions. [2022-03-18 01:11:48,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:11:48,734 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-18 01:11:48,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:48,736 INFO L225 Difference]: With dead ends: 163 [2022-03-18 01:11:48,736 INFO L226 Difference]: Without dead ends: 161 [2022-03-18 01:11:48,736 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:11:48,737 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:48,737 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 293 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:48,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-18 01:11:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 147. [2022-03-18 01:11:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 90 states have internal predecessors, (100), 40 states have call successors, (40), 20 states have call predecessors, (40), 19 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-18 01:11:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 178 transitions. [2022-03-18 01:11:48,756 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 178 transitions. Word has length 63 [2022-03-18 01:11:48,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:48,756 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 178 transitions. [2022-03-18 01:11:48,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 01:11:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 178 transitions. [2022-03-18 01:11:48,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-18 01:11:48,757 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:48,757 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:48,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:48,959 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 01:11:48,959 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:48,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 3 times [2022-03-18 01:11:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:48,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1123695312] [2022-03-18 01:11:48,960 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:48,960 INFO L85 PathProgramCache]: Analyzing trace with hash -522529, now seen corresponding path program 4 times [2022-03-18 01:11:48,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:48,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891429990] [2022-03-18 01:11:48,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:48,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:48,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:48,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267037423] [2022-03-18 01:11:48,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:11:48,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:48,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:48,968 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:48,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 01:11:49,009 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:11:49,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:49,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 01:11:49,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 01:11:49,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-18 01:11:49,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:49,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891429990] [2022-03-18 01:11:49,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:49,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267037423] [2022-03-18 01:11:49,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267037423] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:49,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:49,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-03-18 01:11:49,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1123695312] [2022-03-18 01:11:49,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1123695312] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:49,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:49,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-18 01:11:49,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056353534] [2022-03-18 01:11:49,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:49,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 01:11:49,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:49,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 01:11:49,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:11:49,354 INFO L87 Difference]: Start difference. First operand 147 states and 178 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 01:11:49,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:49,438 INFO L93 Difference]: Finished difference Result 185 states and 223 transitions. [2022-03-18 01:11:49,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 01:11:49,439 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 63 [2022-03-18 01:11:49,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:49,440 INFO L225 Difference]: With dead ends: 185 [2022-03-18 01:11:49,440 INFO L226 Difference]: Without dead ends: 183 [2022-03-18 01:11:49,440 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-03-18 01:11:49,441 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:49,441 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 251 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-18 01:11:49,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 169. [2022-03-18 01:11:49,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 105 states have internal predecessors, (116), 43 states have call successors, (43), 24 states have call predecessors, (43), 23 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-18 01:11:49,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 200 transitions. [2022-03-18 01:11:49,454 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 200 transitions. Word has length 63 [2022-03-18 01:11:49,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:49,454 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 200 transitions. [2022-03-18 01:11:49,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 01:11:49,454 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 200 transitions. [2022-03-18 01:11:49,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 01:11:49,455 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:49,455 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:49,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:49,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 01:11:49,668 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:49,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:49,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 5 times [2022-03-18 01:11:49,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:49,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1266204595] [2022-03-18 01:11:49,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:49,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1383919957, now seen corresponding path program 6 times [2022-03-18 01:11:49,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:49,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633885290] [2022-03-18 01:11:49,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:49,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:49,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:49,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444687226] [2022-03-18 01:11:49,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:11:49,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:49,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:49,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:49,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 01:11:49,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:11:49,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:49,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 01:11:49,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 01:11:49,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 01:11:50,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:50,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633885290] [2022-03-18 01:11:50,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:50,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444687226] [2022-03-18 01:11:50,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444687226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:50,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:50,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-18 01:11:50,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:50,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1266204595] [2022-03-18 01:11:50,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1266204595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:50,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:50,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:11:50,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069882597] [2022-03-18 01:11:50,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:50,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 01:11:50,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:50,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 01:11:50,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-18 01:11:50,209 INFO L87 Difference]: Start difference. First operand 169 states and 200 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 01:11:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:50,383 INFO L93 Difference]: Finished difference Result 191 states and 234 transitions. [2022-03-18 01:11:50,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:11:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2022-03-18 01:11:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:50,385 INFO L225 Difference]: With dead ends: 191 [2022-03-18 01:11:50,385 INFO L226 Difference]: Without dead ends: 185 [2022-03-18 01:11:50,385 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:11:50,386 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:50,386 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 205 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-18 01:11:50,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 172. [2022-03-18 01:11:50,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 107 states have internal predecessors, (117), 45 states have call successors, (45), 24 states have call predecessors, (45), 23 states have return successors, (43), 40 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 01:11:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2022-03-18 01:11:50,424 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 68 [2022-03-18 01:11:50,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:50,424 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2022-03-18 01:11:50,424 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 01:11:50,424 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2022-03-18 01:11:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-18 01:11:50,425 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:50,425 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:50,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-18 01:11:50,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 01:11:50,639 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:50,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:50,640 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 3 times [2022-03-18 01:11:50,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:50,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2079124700] [2022-03-18 01:11:50,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:50,641 INFO L85 PathProgramCache]: Analyzing trace with hash -860063341, now seen corresponding path program 4 times [2022-03-18 01:11:50,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:50,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004372853] [2022-03-18 01:11:50,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:50,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:50,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:50,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259613215] [2022-03-18 01:11:50,651 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:11:50,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:50,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:50,668 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:50,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 01:11:50,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:11:50,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:50,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 01:11:50,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 01:11:50,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-03-18 01:11:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:51,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004372853] [2022-03-18 01:11:51,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:51,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259613215] [2022-03-18 01:11:51,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259613215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:51,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:51,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-03-18 01:11:51,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:51,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2079124700] [2022-03-18 01:11:51,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2079124700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:51,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:51,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:11:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435062682] [2022-03-18 01:11:51,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:51,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 01:11:51,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 01:11:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-18 01:11:51,220 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 01:11:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:51,449 INFO L93 Difference]: Finished difference Result 197 states and 245 transitions. [2022-03-18 01:11:51,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:11:51,449 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2022-03-18 01:11:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:51,451 INFO L225 Difference]: With dead ends: 197 [2022-03-18 01:11:51,451 INFO L226 Difference]: Without dead ends: 188 [2022-03-18 01:11:51,451 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:11:51,452 INFO L912 BasicCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:51,452 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 188 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:11:51,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-18 01:11:51,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-03-18 01:11:51,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 116 states have internal predecessors, (128), 51 states have call successors, (51), 25 states have call predecessors, (51), 24 states have return successors, (49), 46 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-18 01:11:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 228 transitions. [2022-03-18 01:11:51,474 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 228 transitions. Word has length 68 [2022-03-18 01:11:51,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:51,476 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 228 transitions. [2022-03-18 01:11:51,476 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 01:11:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 228 transitions. [2022-03-18 01:11:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 01:11:51,477 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:51,477 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:51,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:51,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 01:11:51,696 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 7 times [2022-03-18 01:11:51,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:51,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1772191262] [2022-03-18 01:11:51,697 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:51,697 INFO L85 PathProgramCache]: Analyzing trace with hash -35686306, now seen corresponding path program 8 times [2022-03-18 01:11:51,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:51,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533529260] [2022-03-18 01:11:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:51,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:51,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:51,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649388061] [2022-03-18 01:11:51,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:51,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:51,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:51,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:51,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 01:11:51,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:51,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:51,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 01:11:51,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 01:11:52,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:52,412 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 20 proven. 27 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 01:11:52,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:52,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533529260] [2022-03-18 01:11:52,413 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:52,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649388061] [2022-03-18 01:11:52,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649388061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:52,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:52,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-18 01:11:52,413 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:52,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1772191262] [2022-03-18 01:11:52,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1772191262] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:52,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:52,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:11:52,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677582486] [2022-03-18 01:11:52,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:52,414 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:11:52,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:11:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:11:52,415 INFO L87 Difference]: Start difference. First operand 188 states and 228 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:11:52,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:52,575 INFO L93 Difference]: Finished difference Result 222 states and 270 transitions. [2022-03-18 01:11:52,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:11:52,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2022-03-18 01:11:52,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:52,577 INFO L225 Difference]: With dead ends: 222 [2022-03-18 01:11:52,577 INFO L226 Difference]: Without dead ends: 220 [2022-03-18 01:11:52,578 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-18 01:11:52,579 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 8 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:52,580 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 288 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:11:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-18 01:11:52,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-18 01:11:52,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 130 states have (on average 1.146153846153846) internal successors, (149), 134 states have internal predecessors, (149), 57 states have call successors, (57), 29 states have call predecessors, (57), 28 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2022-03-18 01:11:52,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 261 transitions. [2022-03-18 01:11:52,605 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 261 transitions. Word has length 81 [2022-03-18 01:11:52,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:52,606 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 261 transitions. [2022-03-18 01:11:52,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:11:52,606 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 261 transitions. [2022-03-18 01:11:52,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 01:11:52,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:52,608 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:52,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:52,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:52,815 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:52,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 7 times [2022-03-18 01:11:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:52,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1255542511] [2022-03-18 01:11:52,816 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:52,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1350517088, now seen corresponding path program 8 times [2022-03-18 01:11:52,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:52,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737104121] [2022-03-18 01:11:52,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:52,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:52,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:52,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909835742] [2022-03-18 01:11:52,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:52,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:52,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:52,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:52,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 01:11:52,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:52,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 01:11:52,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 42 proven. 53 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-18 01:11:54,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-18 01:11:54,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:54,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737104121] [2022-03-18 01:11:54,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909835742] [2022-03-18 01:11:54,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909835742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:54,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:54,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2022-03-18 01:11:54,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:54,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1255542511] [2022-03-18 01:11:54,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1255542511] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:54,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:54,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 01:11:54,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164376821] [2022-03-18 01:11:54,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:54,803 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 01:11:54,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:54,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 01:11:54,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-03-18 01:11:54,804 INFO L87 Difference]: Start difference. First operand 216 states and 261 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-18 01:11:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:55,870 INFO L93 Difference]: Finished difference Result 257 states and 311 transitions. [2022-03-18 01:11:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:11:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-03-18 01:11:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:55,872 INFO L225 Difference]: With dead ends: 257 [2022-03-18 01:11:55,872 INFO L226 Difference]: Without dead ends: 255 [2022-03-18 01:11:55,873 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2022-03-18 01:11:55,873 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:55,873 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 307 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 01:11:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-18 01:11:55,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 221. [2022-03-18 01:11:55,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 138 states have internal predecessors, (153), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (53), 51 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-18 01:11:55,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 261 transitions. [2022-03-18 01:11:55,907 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 261 transitions. Word has length 81 [2022-03-18 01:11:55,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:55,907 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 261 transitions. [2022-03-18 01:11:55,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-18 01:11:55,907 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 261 transitions. [2022-03-18 01:11:55,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 01:11:55,908 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:55,908 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:55,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-18 01:11:56,123 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 01:11:56,123 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:56,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 9 times [2022-03-18 01:11:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:56,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734639607] [2022-03-18 01:11:56,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:56,124 INFO L85 PathProgramCache]: Analyzing trace with hash -388774688, now seen corresponding path program 10 times [2022-03-18 01:11:56,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:56,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810926203] [2022-03-18 01:11:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:56,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:56,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:56,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895917129] [2022-03-18 01:11:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:11:56,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:56,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:56,137 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:56,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 01:11:56,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:11:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-18 01:11:56,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:56,748 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 59 proven. 51 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-03-18 01:11:56,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-18 01:11:56,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810926203] [2022-03-18 01:11:56,970 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895917129] [2022-03-18 01:11:56,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895917129] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:11:56,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:11:56,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-18 01:11:56,970 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:56,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734639607] [2022-03-18 01:11:56,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734639607] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:56,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:56,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:11:56,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771108296] [2022-03-18 01:11:56,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:56,971 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:11:56,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:56,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:11:56,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:11:56,972 INFO L87 Difference]: Start difference. First operand 221 states and 261 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-18 01:11:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:57,350 INFO L93 Difference]: Finished difference Result 261 states and 313 transitions. [2022-03-18 01:11:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 01:11:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) Word has length 81 [2022-03-18 01:11:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:57,352 INFO L225 Difference]: With dead ends: 261 [2022-03-18 01:11:57,352 INFO L226 Difference]: Without dead ends: 259 [2022-03-18 01:11:57,352 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:11:57,353 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:57,353 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 302 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:11:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-03-18 01:11:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 223. [2022-03-18 01:11:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 136 states have (on average 1.1323529411764706) internal successors, (154), 140 states have internal predecessors, (154), 56 states have call successors, (56), 31 states have call predecessors, (56), 30 states have return successors, (54), 51 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-18 01:11:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 264 transitions. [2022-03-18 01:11:57,379 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 264 transitions. Word has length 81 [2022-03-18 01:11:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:57,380 INFO L478 AbstractCegarLoop]: Abstraction has 223 states and 264 transitions. [2022-03-18 01:11:57,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 7 states have call predecessors, (13), 6 states have call successors, (13) [2022-03-18 01:11:57,380 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 264 transitions. [2022-03-18 01:11:57,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-18 01:11:57,380 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:57,381 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:11:57,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:57,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 01:11:57,594 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:57,594 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 11 times [2022-03-18 01:11:57,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:57,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [47077595] [2022-03-18 01:11:57,595 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:57,595 INFO L85 PathProgramCache]: Analyzing trace with hash 997428706, now seen corresponding path program 12 times [2022-03-18 01:11:57,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:57,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155262690] [2022-03-18 01:11:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:57,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:57,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:57,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410652490] [2022-03-18 01:11:57,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:11:57,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:57,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:57,607 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:57,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 01:11:57,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:11:57,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:57,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 01:11:57,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:11:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-03-18 01:11:57,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:11:59,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:11:59,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155262690] [2022-03-18 01:11:59,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:11:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410652490] [2022-03-18 01:11:59,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410652490] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:11:59,241 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:11:59,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 01:11:59,241 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:11:59,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [47077595] [2022-03-18 01:11:59,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [47077595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:11:59,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:11:59,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:11:59,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638606614] [2022-03-18 01:11:59,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:11:59,242 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:11:59,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:59,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:11:59,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:11:59,242 INFO L87 Difference]: Start difference. First operand 223 states and 264 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 01:11:59,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:11:59,669 INFO L93 Difference]: Finished difference Result 282 states and 346 transitions. [2022-03-18 01:11:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:11:59,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 81 [2022-03-18 01:11:59,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:11:59,671 INFO L225 Difference]: With dead ends: 282 [2022-03-18 01:11:59,671 INFO L226 Difference]: Without dead ends: 276 [2022-03-18 01:11:59,672 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:11:59,672 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 01:11:59,672 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 268 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 01:11:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-18 01:11:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 233. [2022-03-18 01:11:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 142 states have (on average 1.119718309859155) internal successors, (159), 147 states have internal predecessors, (159), 58 states have call successors, (58), 33 states have call predecessors, (58), 32 states have return successors, (56), 52 states have call predecessors, (56), 56 states have call successors, (56) [2022-03-18 01:11:59,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 273 transitions. [2022-03-18 01:11:59,710 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 273 transitions. Word has length 81 [2022-03-18 01:11:59,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:11:59,711 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 273 transitions. [2022-03-18 01:11:59,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-18 01:11:59,711 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 273 transitions. [2022-03-18 01:11:59,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 01:11:59,712 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:11:59,712 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-03-18 01:11:59,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 01:11:59,913 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 01:11:59,913 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:11:59,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:11:59,913 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 13 times [2022-03-18 01:11:59,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:11:59,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1789973895] [2022-03-18 01:11:59,914 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:11:59,914 INFO L85 PathProgramCache]: Analyzing trace with hash 327884660, now seen corresponding path program 14 times [2022-03-18 01:11:59,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:11:59,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107895374] [2022-03-18 01:11:59,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:11:59,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:11:59,919 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:11:59,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367604747] [2022-03-18 01:11:59,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:11:59,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:11:59,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:11:59,922 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:11:59,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 01:11:59,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:11:59,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:11:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-18 01:11:59,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-18 01:12:00,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:12:00,757 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 22 proven. 30 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-18 01:12:00,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:00,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107895374] [2022-03-18 01:12:00,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:12:00,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367604747] [2022-03-18 01:12:00,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367604747] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:12:00,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:12:00,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 01:12:00,758 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:00,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1789973895] [2022-03-18 01:12:00,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1789973895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:00,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:00,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:12:00,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548633066] [2022-03-18 01:12:00,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:00,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 01:12:00,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:00,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 01:12:00,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-18 01:12:00,759 INFO L87 Difference]: Start difference. First operand 233 states and 273 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 01:12:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:00,945 INFO L93 Difference]: Finished difference Result 255 states and 307 transitions. [2022-03-18 01:12:00,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:12:00,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-03-18 01:12:00,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:00,951 INFO L225 Difference]: With dead ends: 255 [2022-03-18 01:12:00,951 INFO L226 Difference]: Without dead ends: 249 [2022-03-18 01:12:00,952 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:12:00,953 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:00,953 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 301 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:12:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-18 01:12:00,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 236. [2022-03-18 01:12:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 143 states have (on average 1.118881118881119) internal successors, (160), 149 states have internal predecessors, (160), 60 states have call successors, (60), 33 states have call predecessors, (60), 32 states have return successors, (58), 53 states have call predecessors, (58), 58 states have call successors, (58) [2022-03-18 01:12:00,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 278 transitions. [2022-03-18 01:12:00,983 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 278 transitions. Word has length 86 [2022-03-18 01:12:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:00,984 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 278 transitions. [2022-03-18 01:12:00,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 01:12:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 278 transitions. [2022-03-18 01:12:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 01:12:00,985 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:00,985 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-03-18 01:12:01,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 01:12:01,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:01,195 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 15 times [2022-03-18 01:12:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [193425825] [2022-03-18 01:12:01,196 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:12:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1916098638, now seen corresponding path program 16 times [2022-03-18 01:12:01,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519505042] [2022-03-18 01:12:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:01,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:12:01,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082645773] [2022-03-18 01:12:01,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:12:01,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:12:01,206 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:12:01,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 01:12:01,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:12:01,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:12:01,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-18 01:12:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:02,506 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:12:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 79 proven. 45 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-03-18 01:12:02,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:12:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 01:12:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519505042] [2022-03-18 01:12:03,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:12:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082645773] [2022-03-18 01:12:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082645773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:12:03,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:12:03,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-18 01:12:03,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [193425825] [2022-03-18 01:12:03,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [193425825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:03,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:03,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:12:03,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702122719] [2022-03-18 01:12:03,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:03,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 01:12:03,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:03,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 01:12:03,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:12:03,034 INFO L87 Difference]: Start difference. First operand 236 states and 278 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 01:12:04,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:04,057 INFO L93 Difference]: Finished difference Result 282 states and 338 transitions. [2022-03-18 01:12:04,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 01:12:04,057 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 86 [2022-03-18 01:12:04,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:04,058 INFO L225 Difference]: With dead ends: 282 [2022-03-18 01:12:04,059 INFO L226 Difference]: Without dead ends: 272 [2022-03-18 01:12:04,059 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-03-18 01:12:04,059 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 17 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:04,059 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 379 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 01:12:04,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-18 01:12:04,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 254. [2022-03-18 01:12:04,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 155 states have (on average 1.1161290322580646) internal successors, (173), 161 states have internal predecessors, (173), 63 states have call successors, (63), 36 states have call predecessors, (63), 35 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-03-18 01:12:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 297 transitions. [2022-03-18 01:12:04,118 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 297 transitions. Word has length 86 [2022-03-18 01:12:04,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:04,118 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 297 transitions. [2022-03-18 01:12:04,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-03-18 01:12:04,119 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 297 transitions. [2022-03-18 01:12:04,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 01:12:04,119 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:04,119 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 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] [2022-03-18 01:12:04,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 01:12:04,336 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:04,336 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:04,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 17 times [2022-03-18 01:12:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:04,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [784857367] [2022-03-18 01:12:04,338 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:12:04,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1866224690, now seen corresponding path program 18 times [2022-03-18 01:12:04,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:04,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318230088] [2022-03-18 01:12:04,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:04,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:04,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:12:04,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [338354428] [2022-03-18 01:12:04,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:12:04,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:04,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:12:04,345 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:12:04,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 01:12:04,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:12:04,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:12:04,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-18 01:12:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2022-03-18 01:12:10,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:12:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 01:12:17,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:17,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318230088] [2022-03-18 01:12:17,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:12:17,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338354428] [2022-03-18 01:12:17,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338354428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:12:17,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:12:17,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-18 01:12:17,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:17,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [784857367] [2022-03-18 01:12:17,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [784857367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:17,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:17,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 01:12:17,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373429934] [2022-03-18 01:12:17,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:17,224 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 01:12:17,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:17,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 01:12:17,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=143, Unknown=3, NotChecked=0, Total=182 [2022-03-18 01:12:17,224 INFO L87 Difference]: Start difference. First operand 254 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 01:12:19,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:12:21,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:12:23,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:12:28,648 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:12:30,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:12:33,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:12:35,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:12:37,168 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:12:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:37,389 INFO L93 Difference]: Finished difference Result 302 states and 367 transitions. [2022-03-18 01:12:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:12:37,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) Word has length 86 [2022-03-18 01:12:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:37,391 INFO L225 Difference]: With dead ends: 302 [2022-03-18 01:12:37,391 INFO L226 Difference]: Without dead ends: 292 [2022-03-18 01:12:37,391 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=55, Invalid=214, Unknown=3, NotChecked=0, Total=272 [2022-03-18 01:12:37,391 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 17 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:37,392 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 270 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 324 Invalid, 7 Unknown, 0 Unchecked, 16.9s Time] [2022-03-18 01:12:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-18 01:12:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 287. [2022-03-18 01:12:37,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 176 states have (on average 1.1420454545454546) internal successors, (201), 180 states have internal predecessors, (201), 73 states have call successors, (73), 38 states have call predecessors, (73), 37 states have return successors, (71), 68 states have call predecessors, (71), 71 states have call successors, (71) [2022-03-18 01:12:37,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 345 transitions. [2022-03-18 01:12:37,442 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 345 transitions. Word has length 86 [2022-03-18 01:12:37,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:37,443 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 345 transitions. [2022-03-18 01:12:37,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 6 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-18 01:12:37,443 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 345 transitions. [2022-03-18 01:12:37,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:12:37,444 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:37,444 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:12:37,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 01:12:37,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-18 01:12:37,655 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:37,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:37,656 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 9 times [2022-03-18 01:12:37,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:37,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240311784] [2022-03-18 01:12:37,656 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:12:37,657 INFO L85 PathProgramCache]: Analyzing trace with hash 396850335, now seen corresponding path program 10 times [2022-03-18 01:12:37,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:37,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336346944] [2022-03-18 01:12:37,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:37,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:37,663 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:12:37,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075194950] [2022-03-18 01:12:37,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:12:37,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:12:37,665 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:12:37,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 01:12:37,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:12:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:12:37,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 01:12:37,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 70 proven. 112 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-03-18 01:12:40,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:12:40,502 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2022-03-18 01:12:40,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:40,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336346944] [2022-03-18 01:12:40,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:12:40,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075194950] [2022-03-18 01:12:40,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075194950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:12:40,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:12:40,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-03-18 01:12:40,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:40,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240311784] [2022-03-18 01:12:40,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240311784] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:40,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:40,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:12:40,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371624808] [2022-03-18 01:12:40,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:40,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 01:12:40,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:40,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 01:12:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:12:40,504 INFO L87 Difference]: Start difference. First operand 287 states and 345 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-18 01:12:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:41,624 INFO L93 Difference]: Finished difference Result 317 states and 384 transitions. [2022-03-18 01:12:41,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:12:41,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 99 [2022-03-18 01:12:41,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:41,627 INFO L225 Difference]: With dead ends: 317 [2022-03-18 01:12:41,627 INFO L226 Difference]: Without dead ends: 315 [2022-03-18 01:12:41,627 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2022-03-18 01:12:41,627 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 16 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:41,627 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 393 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 01:12:41,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-18 01:12:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 311. [2022-03-18 01:12:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 191 states have (on average 1.1465968586387434) internal successors, (219), 195 states have internal predecessors, (219), 79 states have call successors, (79), 41 states have call predecessors, (79), 40 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-18 01:12:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 375 transitions. [2022-03-18 01:12:41,696 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 375 transitions. Word has length 99 [2022-03-18 01:12:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:41,697 INFO L478 AbstractCegarLoop]: Abstraction has 311 states and 375 transitions. [2022-03-18 01:12:41,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2022-03-18 01:12:41,697 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 375 transitions. [2022-03-18 01:12:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:12:41,698 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:41,698 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:12:41,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 01:12:41,911 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-18 01:12:41,911 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 19 times [2022-03-18 01:12:41,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:41,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388081125] [2022-03-18 01:12:41,912 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:12:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1783053729, now seen corresponding path program 20 times [2022-03-18 01:12:41,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:41,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287628921] [2022-03-18 01:12:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:41,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:41,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:12:41,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [334065687] [2022-03-18 01:12:41,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:12:41,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:12:41,918 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:12:41,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 01:12:41,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:12:41,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:12:41,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-18 01:12:41,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 01:12:44,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:12:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 01:12:45,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287628921] [2022-03-18 01:12:45,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:12:45,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334065687] [2022-03-18 01:12:45,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334065687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:12:45,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:12:45,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-03-18 01:12:45,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:45,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388081125] [2022-03-18 01:12:45,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388081125] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:45,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:45,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:12:45,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355809547] [2022-03-18 01:12:45,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:45,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:12:45,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:45,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:12:45,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:12:45,186 INFO L87 Difference]: Start difference. First operand 311 states and 375 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 01:12:45,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:45,640 INFO L93 Difference]: Finished difference Result 352 states and 425 transitions. [2022-03-18 01:12:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:12:45,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 99 [2022-03-18 01:12:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:45,642 INFO L225 Difference]: With dead ends: 352 [2022-03-18 01:12:45,642 INFO L226 Difference]: Without dead ends: 350 [2022-03-18 01:12:45,643 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-03-18 01:12:45,643 INFO L912 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:45,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 389 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 01:12:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-18 01:12:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 323. [2022-03-18 01:12:45,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 200 states have (on average 1.135) internal successors, (227), 204 states have internal predecessors, (227), 79 states have call successors, (79), 44 states have call predecessors, (79), 43 states have return successors, (77), 74 states have call predecessors, (77), 77 states have call successors, (77) [2022-03-18 01:12:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 383 transitions. [2022-03-18 01:12:45,702 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 383 transitions. Word has length 99 [2022-03-18 01:12:45,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:45,704 INFO L478 AbstractCegarLoop]: Abstraction has 323 states and 383 transitions. [2022-03-18 01:12:45,704 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-18 01:12:45,704 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 383 transitions. [2022-03-18 01:12:45,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:12:45,704 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:45,704 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:12:45,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-18 01:12:45,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:45,924 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 21 times [2022-03-18 01:12:45,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:45,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1297729700] [2022-03-18 01:12:45,925 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:12:45,925 INFO L85 PathProgramCache]: Analyzing trace with hash 43761953, now seen corresponding path program 22 times [2022-03-18 01:12:45,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:45,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63139425] [2022-03-18 01:12:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:45,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:45,939 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:12:45,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267597787] [2022-03-18 01:12:45,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:12:45,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:45,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:12:45,942 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:12:45,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 01:12:45,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:12:45,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:12:45,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-18 01:12:45,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:46,854 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 80 proven. 84 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-18 01:12:46,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:12:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-18 01:12:47,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:47,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63139425] [2022-03-18 01:12:47,138 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:12:47,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267597787] [2022-03-18 01:12:47,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267597787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:12:47,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:12:47,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-18 01:12:47,139 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:47,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1297729700] [2022-03-18 01:12:47,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1297729700] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:47,139 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:47,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:12:47,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53385138] [2022-03-18 01:12:47,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:47,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:12:47,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:47,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:12:47,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:12:47,140 INFO L87 Difference]: Start difference. First operand 323 states and 383 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 01:12:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:48,171 INFO L93 Difference]: Finished difference Result 357 states and 425 transitions. [2022-03-18 01:12:48,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:12:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-18 01:12:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:48,173 INFO L225 Difference]: With dead ends: 357 [2022-03-18 01:12:48,173 INFO L226 Difference]: Without dead ends: 355 [2022-03-18 01:12:48,173 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:12:48,173 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:48,173 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 393 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 01:12:48,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-18 01:12:48,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 334. [2022-03-18 01:12:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 208 states have (on average 1.1346153846153846) internal successors, (236), 211 states have internal predecessors, (236), 80 states have call successors, (80), 46 states have call predecessors, (80), 45 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2022-03-18 01:12:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 394 transitions. [2022-03-18 01:12:48,247 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 394 transitions. Word has length 99 [2022-03-18 01:12:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:48,247 INFO L478 AbstractCegarLoop]: Abstraction has 334 states and 394 transitions. [2022-03-18 01:12:48,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 01:12:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 394 transitions. [2022-03-18 01:12:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:12:48,248 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:48,248 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:12:48,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 01:12:48,464 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:48,465 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:48,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 23 times [2022-03-18 01:12:48,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:48,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1091268596] [2022-03-18 01:12:48,466 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:12:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1429965347, now seen corresponding path program 24 times [2022-03-18 01:12:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:48,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205832285] [2022-03-18 01:12:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:48,470 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:12:48,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508605511] [2022-03-18 01:12:48,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:12:48,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:48,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:12:48,472 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:12:48,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 01:12:49,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:12:49,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:12:49,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 01:12:49,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 33 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-03-18 01:12:50,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:12:50,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:12:50,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205832285] [2022-03-18 01:12:50,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:12:50,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508605511] [2022-03-18 01:12:50,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508605511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:12:50,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:12:50,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 01:12:50,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:12:50,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1091268596] [2022-03-18 01:12:50,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1091268596] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:12:50,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:12:50,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 01:12:50,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286064575] [2022-03-18 01:12:50,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:12:50,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 01:12:50,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:50,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 01:12:50,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-03-18 01:12:50,718 INFO L87 Difference]: Start difference. First operand 334 states and 394 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:12:55,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:12:55,074 INFO L93 Difference]: Finished difference Result 406 states and 496 transitions. [2022-03-18 01:12:55,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 01:12:55,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-03-18 01:12:55,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:12:55,076 INFO L225 Difference]: With dead ends: 406 [2022-03-18 01:12:55,076 INFO L226 Difference]: Without dead ends: 400 [2022-03-18 01:12:55,077 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2022-03-18 01:12:55,077 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-18 01:12:55,077 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 311 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-18 01:12:55,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-03-18 01:12:55,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 381. [2022-03-18 01:12:55,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 234 states have (on average 1.141025641025641) internal successors, (267), 238 states have internal predecessors, (267), 96 states have call successors, (96), 51 states have call predecessors, (96), 50 states have return successors, (94), 91 states have call predecessors, (94), 94 states have call successors, (94) [2022-03-18 01:12:55,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 457 transitions. [2022-03-18 01:12:55,172 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 457 transitions. Word has length 99 [2022-03-18 01:12:55,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:12:55,172 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 457 transitions. [2022-03-18 01:12:55,172 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:12:55,172 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 457 transitions. [2022-03-18 01:12:55,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:12:55,173 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:12:55,173 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:12:55,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 01:12:55,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 01:12:55,379 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:12:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:12:55,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 25 times [2022-03-18 01:12:55,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:12:55,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2034619618] [2022-03-18 01:12:55,379 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:12:55,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1289329503, now seen corresponding path program 26 times [2022-03-18 01:12:55,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:12:55,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614697317] [2022-03-18 01:12:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:12:55,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:12:55,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:12:55,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336063752] [2022-03-18 01:12:55,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:12:55,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:12:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:12:55,385 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:12:55,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 01:12:55,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:12:55,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:12:55,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-18 01:12:55,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:12:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 98 proven. 66 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-03-18 01:12:58,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:01,167 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-18 01:13:01,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:01,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614697317] [2022-03-18 01:13:01,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:01,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336063752] [2022-03-18 01:13:01,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336063752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:01,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:01,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-18 01:13:01,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:01,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2034619618] [2022-03-18 01:13:01,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2034619618] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:01,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:01,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:13:01,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382363410] [2022-03-18 01:13:01,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:01,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:13:01,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:01,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:13:01,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:13:01,170 INFO L87 Difference]: Start difference. First operand 381 states and 457 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 01:13:04,184 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:13:05,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:13:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:06,101 INFO L93 Difference]: Finished difference Result 421 states and 509 transitions. [2022-03-18 01:13:06,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:13:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-18 01:13:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:06,104 INFO L225 Difference]: With dead ends: 421 [2022-03-18 01:13:06,104 INFO L226 Difference]: Without dead ends: 419 [2022-03-18 01:13:06,105 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:13:06,105 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:06,105 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 372 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 479 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2022-03-18 01:13:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-18 01:13:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 395. [2022-03-18 01:13:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 243 states have (on average 1.139917695473251) internal successors, (277), 247 states have internal predecessors, (277), 99 states have call successors, (99), 53 states have call predecessors, (99), 52 states have return successors, (97), 94 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-18 01:13:06,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 473 transitions. [2022-03-18 01:13:06,229 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 473 transitions. Word has length 99 [2022-03-18 01:13:06,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:06,229 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 473 transitions. [2022-03-18 01:13:06,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 01:13:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 473 transitions. [2022-03-18 01:13:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:13:06,230 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:06,230 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:06,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-18 01:13:06,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 01:13:06,435 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:06,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 27 times [2022-03-18 01:13:06,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:06,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [381972518] [2022-03-18 01:13:06,436 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash 96873891, now seen corresponding path program 28 times [2022-03-18 01:13:06,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:06,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376005117] [2022-03-18 01:13:06,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:06,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:06,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:06,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353847002] [2022-03-18 01:13:06,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:13:06,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:06,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:06,448 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:13:06,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 01:13:06,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:13:06,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:06,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 01:13:06,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 84 proven. 56 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-18 01:13:07,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:07,627 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 277 trivial. 0 not checked. [2022-03-18 01:13:07,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:07,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376005117] [2022-03-18 01:13:07,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:07,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353847002] [2022-03-18 01:13:07,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353847002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:07,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:07,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 17 [2022-03-18 01:13:07,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:07,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [381972518] [2022-03-18 01:13:07,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [381972518] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:07,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:07,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-18 01:13:07,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262943828] [2022-03-18 01:13:07,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:07,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 01:13:07,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:07,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 01:13:07,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-18 01:13:07,629 INFO L87 Difference]: Start difference. First operand 395 states and 473 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 01:13:09,949 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:13:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:10,904 INFO L93 Difference]: Finished difference Result 431 states and 528 transitions. [2022-03-18 01:13:10,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 01:13:10,905 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 99 [2022-03-18 01:13:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:10,906 INFO L225 Difference]: With dead ends: 431 [2022-03-18 01:13:10,907 INFO L226 Difference]: Without dead ends: 425 [2022-03-18 01:13:10,907 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-03-18 01:13:10,907 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:10,907 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 465 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-18 01:13:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-18 01:13:11,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 408. [2022-03-18 01:13:11,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 250 states have (on average 1.14) internal successors, (285), 255 states have internal predecessors, (285), 104 states have call successors, (104), 54 states have call predecessors, (104), 53 states have return successors, (102), 98 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-18 01:13:11,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 491 transitions. [2022-03-18 01:13:11,013 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 491 transitions. Word has length 99 [2022-03-18 01:13:11,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:11,013 INFO L478 AbstractCegarLoop]: Abstraction has 408 states and 491 transitions. [2022-03-18 01:13:11,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-03-18 01:13:11,014 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 491 transitions. [2022-03-18 01:13:11,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-18 01:13:11,014 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:11,014 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:11,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 01:13:11,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 01:13:11,231 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:11,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 29 times [2022-03-18 01:13:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103106037] [2022-03-18 01:13:11,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1642417885, now seen corresponding path program 30 times [2022-03-18 01:13:11,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:11,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291881105] [2022-03-18 01:13:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:11,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:11,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:11,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959420226] [2022-03-18 01:13:11,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:13:11,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:11,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:11,238 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:13:11,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 01:13:11,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:13:11,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:11,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-18 01:13:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:11,664 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 60 proven. 70 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-03-18 01:13:11,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 74 proven. 46 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2022-03-18 01:13:20,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:20,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291881105] [2022-03-18 01:13:20,036 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:20,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959420226] [2022-03-18 01:13:20,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959420226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:20,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:20,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-03-18 01:13:20,037 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:20,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103106037] [2022-03-18 01:13:20,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103106037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:20,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:20,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-18 01:13:20,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528611589] [2022-03-18 01:13:20,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:20,037 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 01:13:20,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:20,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 01:13:20,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=162, Unknown=2, NotChecked=0, Total=210 [2022-03-18 01:13:20,038 INFO L87 Difference]: Start difference. First operand 408 states and 491 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:13:22,359 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:13:23,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:23,033 INFO L93 Difference]: Finished difference Result 465 states and 566 transitions. [2022-03-18 01:13:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 01:13:23,036 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 99 [2022-03-18 01:13:23,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:23,038 INFO L225 Difference]: With dead ends: 465 [2022-03-18 01:13:23,038 INFO L226 Difference]: Without dead ends: 463 [2022-03-18 01:13:23,038 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=59, Invalid=211, Unknown=2, NotChecked=0, Total=272 [2022-03-18 01:13:23,038 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:23,039 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 147 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 223 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-03-18 01:13:23,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-03-18 01:13:23,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 394. [2022-03-18 01:13:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 241 states have (on average 1.1327800829875518) internal successors, (273), 249 states have internal predecessors, (273), 100 states have call successors, (100), 53 states have call predecessors, (100), 52 states have return successors, (98), 91 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-18 01:13:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 471 transitions. [2022-03-18 01:13:23,141 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 471 transitions. Word has length 99 [2022-03-18 01:13:23,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:23,141 INFO L478 AbstractCegarLoop]: Abstraction has 394 states and 471 transitions. [2022-03-18 01:13:23,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-18 01:13:23,141 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 471 transitions. [2022-03-18 01:13:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 01:13:23,142 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:23,142 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:23,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 01:13:23,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 01:13:23,355 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 31 times [2022-03-18 01:13:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:23,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [281022694] [2022-03-18 01:13:23,356 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:23,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1917559763, now seen corresponding path program 32 times [2022-03-18 01:13:23,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:23,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440838413] [2022-03-18 01:13:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:23,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:23,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:23,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [899968254] [2022-03-18 01:13:23,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:13:23,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:23,362 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:13:23,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 01:13:23,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:13:23,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:23,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-18 01:13:23,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-18 01:13:23,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:24,089 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 28 proven. 52 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-18 01:13:24,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440838413] [2022-03-18 01:13:24,089 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:24,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899968254] [2022-03-18 01:13:24,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899968254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:24,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:24,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-18 01:13:24,090 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:24,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [281022694] [2022-03-18 01:13:24,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [281022694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:24,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:24,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-18 01:13:24,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980330602] [2022-03-18 01:13:24,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:24,090 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 01:13:24,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:24,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 01:13:24,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-03-18 01:13:24,091 INFO L87 Difference]: Start difference. First operand 394 states and 471 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 01:13:24,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:24,379 INFO L93 Difference]: Finished difference Result 420 states and 508 transitions. [2022-03-18 01:13:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 01:13:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 104 [2022-03-18 01:13:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:24,381 INFO L225 Difference]: With dead ends: 420 [2022-03-18 01:13:24,381 INFO L226 Difference]: Without dead ends: 414 [2022-03-18 01:13:24,382 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:13:24,382 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 8 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:24,382 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 381 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:13:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-03-18 01:13:24,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 391. [2022-03-18 01:13:24,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 240 states have (on average 1.1333333333333333) internal successors, (272), 247 states have internal predecessors, (272), 98 states have call successors, (98), 53 states have call predecessors, (98), 52 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-18 01:13:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 466 transitions. [2022-03-18 01:13:24,493 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 466 transitions. Word has length 104 [2022-03-18 01:13:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:24,493 INFO L478 AbstractCegarLoop]: Abstraction has 391 states and 466 transitions. [2022-03-18 01:13:24,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 6 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 01:13:24,494 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 466 transitions. [2022-03-18 01:13:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 01:13:24,494 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:24,494 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:24,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-18 01:13:24,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 01:13:24,707 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:24,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 33 times [2022-03-18 01:13:24,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:24,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1994784639] [2022-03-18 01:13:24,708 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:24,708 INFO L85 PathProgramCache]: Analyzing trace with hash -326423535, now seen corresponding path program 34 times [2022-03-18 01:13:24,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:24,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325467438] [2022-03-18 01:13:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:24,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:24,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:24,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900092307] [2022-03-18 01:13:24,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:13:24,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:24,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:24,714 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:13:24,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 01:13:24,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:13:24,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 01:13:24,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 104 proven. 114 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2022-03-18 01:13:25,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:26,127 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-03-18 01:13:26,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:26,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325467438] [2022-03-18 01:13:26,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:26,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900092307] [2022-03-18 01:13:26,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900092307] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:26,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:26,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 23 [2022-03-18 01:13:26,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:26,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1994784639] [2022-03-18 01:13:26,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1994784639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:26,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:26,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:13:26,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427598673] [2022-03-18 01:13:26,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:26,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:13:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:26,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:13:26,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-18 01:13:26,129 INFO L87 Difference]: Start difference. First operand 391 states and 466 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-18 01:13:26,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:13:26,991 INFO L93 Difference]: Finished difference Result 431 states and 525 transitions. [2022-03-18 01:13:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 01:13:26,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) Word has length 104 [2022-03-18 01:13:26,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:13:26,994 INFO L225 Difference]: With dead ends: 431 [2022-03-18 01:13:26,994 INFO L226 Difference]: Without dead ends: 419 [2022-03-18 01:13:26,994 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 182 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-03-18 01:13:26,995 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 33 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:13:26,995 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 286 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 590 Invalid, 0 Unknown, 19 Unchecked, 0.7s Time] [2022-03-18 01:13:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-18 01:13:27,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 395. [2022-03-18 01:13:27,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 242 states have (on average 1.1363636363636365) internal successors, (275), 248 states have internal predecessors, (275), 100 states have call successors, (100), 53 states have call predecessors, (100), 52 states have return successors, (98), 93 states have call predecessors, (98), 98 states have call successors, (98) [2022-03-18 01:13:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 473 transitions. [2022-03-18 01:13:27,114 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 473 transitions. Word has length 104 [2022-03-18 01:13:27,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:13:27,114 INFO L478 AbstractCegarLoop]: Abstraction has 395 states and 473 transitions. [2022-03-18 01:13:27,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2022-03-18 01:13:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 473 transitions. [2022-03-18 01:13:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 01:13:27,115 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:13:27,115 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:13:27,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 01:13:27,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:27,330 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:13:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:13:27,330 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 35 times [2022-03-18 01:13:27,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:27,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2014003215] [2022-03-18 01:13:27,331 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:13:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash -839067503, now seen corresponding path program 36 times [2022-03-18 01:13:27,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:13:27,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042617421] [2022-03-18 01:13:27,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:13:27,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:13:27,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:13:27,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920854729] [2022-03-18 01:13:27,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:13:27,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:13:27,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:13:27,336 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:13:27,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 01:13:27,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:13:27,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:13:27,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-18 01:13:27,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:13:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 127 proven. 49 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-03-18 01:13:37,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:13:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 146 proven. 3 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2022-03-18 01:13:37,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:13:37,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042617421] [2022-03-18 01:13:37,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:13:37,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920854729] [2022-03-18 01:13:37,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920854729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:13:37,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:13:37,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 23 [2022-03-18 01:13:37,832 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:13:37,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2014003215] [2022-03-18 01:13:37,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2014003215] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:13:37,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:13:37,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:13:37,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455006267] [2022-03-18 01:13:37,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:13:37,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:13:37,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:13:37,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:13:37,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=402, Unknown=1, NotChecked=0, Total=506 [2022-03-18 01:13:37,833 INFO L87 Difference]: Start difference. First operand 395 states and 473 transitions. Second operand has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 01:13:40,368 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:13:42,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:23,729 WARN L232 SmtUtils]: Spent 40.96s on a formula simplification. DAG size of input: 62 DAG size of output: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 01:14:25,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:27,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:29,994 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:32,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:34,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:36,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:38,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:40,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:42,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:44,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:14:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:46,157 INFO L93 Difference]: Finished difference Result 434 states and 515 transitions. [2022-03-18 01:14:46,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 01:14:46,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) Word has length 104 [2022-03-18 01:14:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:46,159 INFO L225 Difference]: With dead ends: 434 [2022-03-18 01:14:46,159 INFO L226 Difference]: Without dead ends: 424 [2022-03-18 01:14:46,160 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 45.6s TimeCoverageRelationStatistics Valid=131, Invalid=570, Unknown=1, NotChecked=0, Total=702 [2022-03-18 01:14:46,160 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 31 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:46,160 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 241 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 494 Invalid, 11 Unknown, 0 Unchecked, 27.1s Time] [2022-03-18 01:14:46,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-03-18 01:14:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-03-18 01:14:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 262 states have (on average 1.1297709923664123) internal successors, (296), 268 states have internal predecessors, (296), 104 states have call successors, (104), 58 states have call predecessors, (104), 57 states have return successors, (102), 97 states have call predecessors, (102), 102 states have call successors, (102) [2022-03-18 01:14:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 502 transitions. [2022-03-18 01:14:46,295 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 502 transitions. Word has length 104 [2022-03-18 01:14:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:46,296 INFO L478 AbstractCegarLoop]: Abstraction has 424 states and 502 transitions. [2022-03-18 01:14:46,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 8 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-18 01:14:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 502 transitions. [2022-03-18 01:14:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 01:14:46,297 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:46,297 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:46,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-18 01:14:46,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 01:14:46,503 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash -468949743, now seen corresponding path program 37 times [2022-03-18 01:14:46,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:46,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [869981182] [2022-03-18 01:14:46,503 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:46,503 INFO L85 PathProgramCache]: Analyzing trace with hash -468949743, now seen corresponding path program 38 times [2022-03-18 01:14:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:46,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924419966] [2022-03-18 01:14:46,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:46,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:46,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:46,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121150964] [2022-03-18 01:14:46,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:14:46,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:46,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:46,509 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:14:46,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 01:14:46,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:14:46,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-18 01:14:46,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:47,172 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-03-18 01:14:47,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 111 proven. 28 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-03-18 01:14:47,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:47,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924419966] [2022-03-18 01:14:47,541 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:47,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121150964] [2022-03-18 01:14:47,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121150964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:47,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:47,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-03-18 01:14:47,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:47,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [869981182] [2022-03-18 01:14:47,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [869981182] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:47,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:47,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:14:47,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943227345] [2022-03-18 01:14:47,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:47,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:14:47,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:14:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-03-18 01:14:47,543 INFO L87 Difference]: Start difference. First operand 424 states and 502 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-18 01:14:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:48,367 INFO L93 Difference]: Finished difference Result 446 states and 536 transitions. [2022-03-18 01:14:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:14:48,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) Word has length 104 [2022-03-18 01:14:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:48,370 INFO L225 Difference]: With dead ends: 446 [2022-03-18 01:14:48,370 INFO L226 Difference]: Without dead ends: 440 [2022-03-18 01:14:48,370 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-18 01:14:48,370 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:48,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 394 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 01:14:48,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-03-18 01:14:48,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 412. [2022-03-18 01:14:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 254 states have (on average 1.1299212598425197) internal successors, (287), 261 states have internal predecessors, (287), 102 states have call successors, (102), 56 states have call predecessors, (102), 55 states have return successors, (100), 94 states have call predecessors, (100), 100 states have call successors, (100) [2022-03-18 01:14:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 489 transitions. [2022-03-18 01:14:48,496 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 489 transitions. Word has length 104 [2022-03-18 01:14:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:48,496 INFO L478 AbstractCegarLoop]: Abstraction has 412 states and 489 transitions. [2022-03-18 01:14:48,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-18 01:14:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 489 transitions. [2022-03-18 01:14:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-18 01:14:48,498 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:48,498 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:48,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 01:14:48,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:48,703 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1582034255, now seen corresponding path program 39 times [2022-03-18 01:14:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1142524500] [2022-03-18 01:14:48,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:48,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1582034255, now seen corresponding path program 40 times [2022-03-18 01:14:48,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:48,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089754670] [2022-03-18 01:14:48,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:48,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:48,708 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:48,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [293260398] [2022-03-18 01:14:48,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:14:48,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:48,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:48,711 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:14:48,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 01:14:48,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:14:48,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:48,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 01:14:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 107 proven. 108 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-03-18 01:14:49,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2022-03-18 01:14:49,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:14:49,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089754670] [2022-03-18 01:14:49,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:14:49,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293260398] [2022-03-18 01:14:49,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293260398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:14:49,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:14:49,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-03-18 01:14:49,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:14:49,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1142524500] [2022-03-18 01:14:49,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1142524500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:14:49,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:14:49,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-18 01:14:49,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319070175] [2022-03-18 01:14:49,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:14:49,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 01:14:49,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:49,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 01:14:49,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-03-18 01:14:49,604 INFO L87 Difference]: Start difference. First operand 412 states and 489 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 01:14:50,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:14:50,531 INFO L93 Difference]: Finished difference Result 454 states and 542 transitions. [2022-03-18 01:14:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 01:14:50,532 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) Word has length 104 [2022-03-18 01:14:50,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:14:50,533 INFO L225 Difference]: With dead ends: 454 [2022-03-18 01:14:50,533 INFO L226 Difference]: Without dead ends: 444 [2022-03-18 01:14:50,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 190 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-18 01:14:50,534 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 01:14:50,534 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 401 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 01:14:50,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-03-18 01:14:50,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 419. [2022-03-18 01:14:50,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 260 states have (on average 1.126923076923077) internal successors, (293), 267 states have internal predecessors, (293), 101 states have call successors, (101), 58 states have call predecessors, (101), 57 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-18 01:14:50,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 493 transitions. [2022-03-18 01:14:50,667 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 493 transitions. Word has length 104 [2022-03-18 01:14:50,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:14:50,667 INFO L478 AbstractCegarLoop]: Abstraction has 419 states and 493 transitions. [2022-03-18 01:14:50,667 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 7 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-18 01:14:50,667 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 493 transitions. [2022-03-18 01:14:50,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 01:14:50,668 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:14:50,668 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:14:50,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-18 01:14:50,873 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:50,873 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:14:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:14:50,873 INFO L85 PathProgramCache]: Analyzing trace with hash -567590240, now seen corresponding path program 11 times [2022-03-18 01:14:50,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:14:50,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [73947477] [2022-03-18 01:14:50,874 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:14:50,874 INFO L85 PathProgramCache]: Analyzing trace with hash -567590240, now seen corresponding path program 12 times [2022-03-18 01:14:50,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:14:50,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922122327] [2022-03-18 01:14:50,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:14:50,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:14:50,878 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:14:50,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [451559069] [2022-03-18 01:14:50,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:14:50,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:14:50,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:14:50,879 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:14:50,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 01:14:50,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:14:50,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:14:50,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-18 01:14:50,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:14:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 123 proven. 20 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-18 01:14:51,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:14:51,395 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-18 01:16:01,259 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0)))))) is different from true [2022-03-18 01:17:06,961 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (or (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))) (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0)))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-18 01:17:25,014 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~r~0_BEFORE_CALL_453 Int) (v_main_~p~0_BEFORE_CALL_447 Int) (v_main_~s~0_BEFORE_CALL_405 Int) (v_main_~q~0_BEFORE_CALL_420 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_453 v_main_~q~0_BEFORE_CALL_420) 1))) (or (= .cse0 0) (= (mod .cse0 v_main_~s~0_BEFORE_CALL_405) 0) (not (= (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_405) v_main_~r~0_BEFORE_CALL_453) v_main_~q~0_BEFORE_CALL_420) 1) (* (+ v_main_~p~0_BEFORE_CALL_447 (* (- 1) v_main_~q~0_BEFORE_CALL_420)) v_main_~s~0_BEFORE_CALL_405))))))) is different from true [2022-03-18 01:17:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:17:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922122327] [2022-03-18 01:17:32,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:17:32,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451559069] [2022-03-18 01:17:32,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451559069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:17:32,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:17:32,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 01:17:32,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:17:32,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [73947477] [2022-03-18 01:17:32,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [73947477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:17:32,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:17:32,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:17:32,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340067968] [2022-03-18 01:17:32,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:17:32,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:17:32,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:17:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=194, Unknown=5, NotChecked=90, Total=342 [2022-03-18 01:17:32,996 INFO L87 Difference]: Start difference. First operand 419 states and 493 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 01:17:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:17:33,388 INFO L93 Difference]: Finished difference Result 467 states and 556 transitions. [2022-03-18 01:17:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 01:17:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 117 [2022-03-18 01:17:33,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:17:33,391 INFO L225 Difference]: With dead ends: 467 [2022-03-18 01:17:33,391 INFO L226 Difference]: Without dead ends: 465 [2022-03-18 01:17:33,391 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=77, Invalid=272, Unknown=5, NotChecked=108, Total=462 [2022-03-18 01:17:33,391 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 19 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 01:17:33,392 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 182 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 01:17:33,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-03-18 01:17:33,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2022-03-18 01:17:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 266 states have (on average 1.1240601503759398) internal successors, (299), 273 states have internal predecessors, (299), 101 states have call successors, (101), 60 states have call predecessors, (101), 59 states have return successors, (99), 93 states have call predecessors, (99), 99 states have call successors, (99) [2022-03-18 01:17:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 499 transitions. [2022-03-18 01:17:33,523 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 499 transitions. Word has length 117 [2022-03-18 01:17:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:17:33,523 INFO L478 AbstractCegarLoop]: Abstraction has 427 states and 499 transitions. [2022-03-18 01:17:33,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-18 01:17:33,523 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 499 transitions. [2022-03-18 01:17:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 01:17:33,524 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:17:33,524 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:17:33,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 01:17:33,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-18 01:17:33,725 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:17:33,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:17:33,725 INFO L85 PathProgramCache]: Analyzing trace with hash 818613154, now seen corresponding path program 41 times [2022-03-18 01:17:33,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:33,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1272840741] [2022-03-18 01:17:33,726 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:17:33,726 INFO L85 PathProgramCache]: Analyzing trace with hash 818613154, now seen corresponding path program 42 times [2022-03-18 01:17:33,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:17:33,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594654847] [2022-03-18 01:17:33,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:17:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:17:33,731 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:17:33,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849734569] [2022-03-18 01:17:33,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:17:33,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:17:33,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:17:33,732 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:17:33,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 01:17:33,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-18 01:17:33,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:17:33,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 01:17:33,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:17:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 73 proven. 43 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2022-03-18 01:17:34,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:17:38,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:17:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594654847] [2022-03-18 01:17:38,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:17:38,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849734569] [2022-03-18 01:17:38,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849734569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 01:17:38,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 01:17:38,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 01:17:38,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:17:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1272840741] [2022-03-18 01:17:38,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1272840741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:17:38,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:17:38,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-18 01:17:38,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518573697] [2022-03-18 01:17:38,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:17:38,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 01:17:38,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:38,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 01:17:38,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2022-03-18 01:17:38,544 INFO L87 Difference]: Start difference. First operand 427 states and 499 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 01:17:40,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:17:42,938 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 01:17:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:17:43,577 INFO L93 Difference]: Finished difference Result 520 states and 633 transitions. [2022-03-18 01:17:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 01:17:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 117 [2022-03-18 01:17:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:17:43,584 INFO L225 Difference]: With dead ends: 520 [2022-03-18 01:17:43,585 INFO L226 Difference]: Without dead ends: 514 [2022-03-18 01:17:43,585 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=53, Invalid=217, Unknown=2, NotChecked=0, Total=272 [2022-03-18 01:17:43,586 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 16 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-18 01:17:43,586 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 221 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 260 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-03-18 01:17:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-03-18 01:17:43,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 487. [2022-03-18 01:17:43,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 308 states have internal predecessors, (340), 122 states have call successors, (122), 65 states have call predecessors, (122), 64 states have return successors, (120), 113 states have call predecessors, (120), 120 states have call successors, (120) [2022-03-18 01:17:43,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 582 transitions. [2022-03-18 01:17:43,802 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 582 transitions. Word has length 117 [2022-03-18 01:17:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:17:43,802 INFO L478 AbstractCegarLoop]: Abstraction has 487 states and 582 transitions. [2022-03-18 01:17:43,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-03-18 01:17:43,803 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 582 transitions. [2022-03-18 01:17:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 01:17:43,804 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:17:43,804 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:17:43,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 01:17:44,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 01:17:44,019 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:17:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:17:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash -920678622, now seen corresponding path program 43 times [2022-03-18 01:17:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1420650383] [2022-03-18 01:17:44,020 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:17:44,020 INFO L85 PathProgramCache]: Analyzing trace with hash -920678622, now seen corresponding path program 44 times [2022-03-18 01:17:44,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:17:44,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374110767] [2022-03-18 01:17:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:17:44,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:17:44,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:17:44,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149735826] [2022-03-18 01:17:44,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 01:17:44,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:17:44,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:17:44,027 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:17:44,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 01:17:44,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 01:17:44,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:17:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-18 01:17:44,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:17:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 126 proven. 149 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-18 01:17:46,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:17:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-18 01:17:46,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:17:46,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374110767] [2022-03-18 01:17:46,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:17:46,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149735826] [2022-03-18 01:17:46,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149735826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:17:46,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:17:46,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-18 01:17:46,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:17:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1420650383] [2022-03-18 01:17:46,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1420650383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:17:46,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:17:46,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-18 01:17:46,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135048334] [2022-03-18 01:17:46,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:17:46,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 01:17:46,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:46,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 01:17:46,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2022-03-18 01:17:46,796 INFO L87 Difference]: Start difference. First operand 487 states and 582 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:17:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:17:49,690 INFO L93 Difference]: Finished difference Result 533 states and 637 transitions. [2022-03-18 01:17:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 01:17:49,691 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 117 [2022-03-18 01:17:49,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:17:49,698 INFO L225 Difference]: With dead ends: 533 [2022-03-18 01:17:49,698 INFO L226 Difference]: Without dead ends: 531 [2022-03-18 01:17:49,699 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 210 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-18 01:17:49,700 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 24 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-18 01:17:49,701 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 502 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-18 01:17:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-03-18 01:17:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 509. [2022-03-18 01:17:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 315 states have (on average 1.1301587301587301) internal successors, (356), 323 states have internal predecessors, (356), 125 states have call successors, (125), 69 states have call predecessors, (125), 68 states have return successors, (123), 116 states have call predecessors, (123), 123 states have call successors, (123) [2022-03-18 01:17:49,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 604 transitions. [2022-03-18 01:17:49,923 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 604 transitions. Word has length 117 [2022-03-18 01:17:49,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:17:49,923 INFO L478 AbstractCegarLoop]: Abstraction has 509 states and 604 transitions. [2022-03-18 01:17:49,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 14 states have internal predecessors, (35), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-18 01:17:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 604 transitions. [2022-03-18 01:17:49,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 01:17:49,925 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:17:49,925 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:17:49,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-18 01:17:50,138 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 01:17:50,139 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:17:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:17:50,139 INFO L85 PathProgramCache]: Analyzing trace with hash 465524772, now seen corresponding path program 45 times [2022-03-18 01:17:50,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:50,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1075484228] [2022-03-18 01:17:50,140 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:17:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash 465524772, now seen corresponding path program 46 times [2022-03-18 01:17:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:17:50,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062192951] [2022-03-18 01:17:50,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:17:50,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:17:50,146 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:17:50,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793884988] [2022-03-18 01:17:50,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 01:17:50,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:17:50,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:17:50,160 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:17:50,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 01:17:50,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 01:17:50,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:17:50,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 01:17:50,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:17:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 118 proven. 136 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-03-18 01:17:54,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:17:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-18 01:17:54,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:17:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062192951] [2022-03-18 01:17:54,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:17:54,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793884988] [2022-03-18 01:17:54,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793884988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:17:54,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:17:54,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-03-18 01:17:54,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:17:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1075484228] [2022-03-18 01:17:54,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1075484228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:17:54,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:17:54,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-18 01:17:54,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818409406] [2022-03-18 01:17:54,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:17:54,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 01:17:54,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:54,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 01:17:54,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-03-18 01:17:54,647 INFO L87 Difference]: Start difference. First operand 509 states and 604 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-18 01:17:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:17:56,967 INFO L93 Difference]: Finished difference Result 553 states and 659 transitions. [2022-03-18 01:17:56,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 01:17:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) Word has length 117 [2022-03-18 01:17:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:17:56,970 INFO L225 Difference]: With dead ends: 553 [2022-03-18 01:17:56,970 INFO L226 Difference]: Without dead ends: 551 [2022-03-18 01:17:56,970 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-03-18 01:17:56,970 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 01:17:56,971 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 625 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 01:17:56,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-18 01:17:57,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 527. [2022-03-18 01:17:57,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 327 states have (on average 1.128440366972477) internal successors, (369), 335 states have internal predecessors, (369), 128 states have call successors, (128), 72 states have call predecessors, (128), 71 states have return successors, (126), 119 states have call predecessors, (126), 126 states have call successors, (126) [2022-03-18 01:17:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 623 transitions. [2022-03-18 01:17:57,229 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 623 transitions. Word has length 117 [2022-03-18 01:17:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:17:57,229 INFO L478 AbstractCegarLoop]: Abstraction has 527 states and 623 transitions. [2022-03-18 01:17:57,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 9 states have call predecessors, (19), 9 states have call successors, (19) [2022-03-18 01:17:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 623 transitions. [2022-03-18 01:17:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-18 01:17:57,231 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 01:17:57,231 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 01:17:57,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 01:17:57,448 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:17:57,448 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 01:17:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 01:17:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2041197218, now seen corresponding path program 47 times [2022-03-18 01:17:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1523847250] [2022-03-18 01:17:57,449 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-18 01:17:57,449 INFO L85 PathProgramCache]: Analyzing trace with hash 2041197218, now seen corresponding path program 48 times [2022-03-18 01:17:57,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 01:17:57,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537235524] [2022-03-18 01:17:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 01:17:57,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 01:17:57,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 01:17:57,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452321346] [2022-03-18 01:17:57,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 01:17:57,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 01:17:57,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 01:17:57,455 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 01:17:57,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 01:17:57,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 01:17:57,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 01:17:57,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-18 01:17:57,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 01:17:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-18 01:17:57,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 01:17:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2022-03-18 01:17:57,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 01:17:57,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537235524] [2022-03-18 01:17:57,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 01:17:57,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452321346] [2022-03-18 01:17:57,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452321346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 01:17:57,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 01:17:57,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 01:17:57,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-18 01:17:57,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1523847250] [2022-03-18 01:17:57,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1523847250] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 01:17:57,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 01:17:57,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-18 01:17:57,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064488301] [2022-03-18 01:17:57,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 01:17:57,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 01:17:57,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-18 01:17:57,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 01:17:57,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 01:17:57,903 INFO L87 Difference]: Start difference. First operand 527 states and 623 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:17:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 01:17:58,368 INFO L93 Difference]: Finished difference Result 531 states and 626 transitions. [2022-03-18 01:17:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 01:17:58,369 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 117 [2022-03-18 01:17:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 01:17:58,370 INFO L225 Difference]: With dead ends: 531 [2022-03-18 01:17:58,370 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 01:17:58,371 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 222 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-18 01:17:58,371 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 01:17:58,371 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 01:17:58,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 01:17:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 01:17:58,372 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) [2022-03-18 01:17:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 01:17:58,372 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 117 [2022-03-18 01:17:58,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 01:17:58,372 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 01:17:58,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-18 01:17:58,372 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 01:17:58,372 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 01:17:58,374 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 01:17:58,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 01:17:58,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 01:17:58,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 01:18:03,858 WARN L232 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 745 DAG size of output: 717 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-18 01:18:10,759 WARN L232 SmtUtils]: Spent 5.55s on a formula simplification. DAG size of input: 745 DAG size of output: 717 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-03-18 01:22:51,400 WARN L232 SmtUtils]: Spent 4.68m on a formula simplification. DAG size of input: 517 DAG size of output: 512 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)