/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-scaling/egcd2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 10:23:14,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 10:23:14,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 10:23:14,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 10:23:14,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 10:23:14,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 10:23:14,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 10:23:14,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-19 10:23:14,433 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 10:23:14,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 10:23:14,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 10:23:14,435 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 10:23:14,435 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 10:23:14,435 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 10:23:14,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 10:23:14,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 10:23:14,436 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 10:23:14,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 10:23:14,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 10:23:14,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:23:14,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 10:23:14,437 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-19 10:23:14,437 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 10:23:14,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 10:23:14,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 10:23:14,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 10:23:14,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 10:23:14,684 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 10:23:14,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-03-19 10:23:14,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197ca1514/a3f8baa28e2b4b3eb92e497a979f0723/FLAG0dcafb073 [2022-03-19 10:23:15,100 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 10:23:15,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2022-03-19 10:23:15,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197ca1514/a3f8baa28e2b4b3eb92e497a979f0723/FLAG0dcafb073 [2022-03-19 10:23:15,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197ca1514/a3f8baa28e2b4b3eb92e497a979f0723 [2022-03-19 10:23:15,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 10:23:15,125 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 10:23:15,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 10:23:15,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 10:23:15,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 10:23:15,130 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7be26ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15, skipping insertion in model container [2022-03-19 10:23:15,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 10:23:15,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 10:23:15,271 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-scaling/egcd2-ll_unwindbound20.c[490,503] [2022-03-19 10:23:15,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:23:15,311 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 10:23:15,321 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-scaling/egcd2-ll_unwindbound20.c[490,503] [2022-03-19 10:23:15,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 10:23:15,352 INFO L208 MainTranslator]: Completed translation [2022-03-19 10:23:15,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15 WrapperNode [2022-03-19 10:23:15,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 10:23:15,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 10:23:15,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 10:23:15,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 10:23:15,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,386 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,389 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,389 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 10:23:15,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 10:23:15,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 10:23:15,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 10:23:15,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (1/1) ... [2022-03-19 10:23:15,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 10:23:15,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:15,415 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) [2022-03-19 10:23:15,439 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 [2022-03-19 10:23:15,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 10:23:15,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 10:23:15,449 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 10:23:15,449 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 10:23:15,450 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 10:23:15,450 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 10:23:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 10:23:15,450 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 10:23:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 10:23:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 10:23:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-19 10:23:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 10:23:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 10:23:15,451 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 10:23:15,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 10:23:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 10:23:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 10:23:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 10:23:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 10:23:15,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 10:23:15,517 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 10:23:15,518 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 10:23:15,693 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 10:23:15,698 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 10:23:15,698 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 10:23:15,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:23:15 BoogieIcfgContainer [2022-03-19 10:23:15,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 10:23:15,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 10:23:15,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 10:23:15,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 10:23:15,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 10:23:15" (1/3) ... [2022-03-19 10:23:15,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f83c422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:23:15, skipping insertion in model container [2022-03-19 10:23:15,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 10:23:15" (2/3) ... [2022-03-19 10:23:15,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f83c422 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 10:23:15, skipping insertion in model container [2022-03-19 10:23:15,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 10:23:15" (3/3) ... [2022-03-19 10:23:15,705 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2022-03-19 10:23:15,708 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 10:23:15,709 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 10:23:15,743 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 10:23:15,758 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 [2022-03-19 10:23:15,758 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 10:23:15,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 10:23:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-19 10:23:15,787 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:15,787 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:15,788 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 1 times [2022-03-19 10:23:15,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:15,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159018641] [2022-03-19 10:23:15,811 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1950618521, now seen corresponding path program 2 times [2022-03-19 10:23:15,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:15,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098073695] [2022-03-19 10:23:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:15,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:15,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:23:15,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 10:23:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:23:15,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 10:23:15,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:23:16,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-19 10:23:16,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:23:16,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 10:23:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:23:16,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-19 10:23:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 10:23:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:23:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:16,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098073695] [2022-03-19 10:23:16,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098073695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:16,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:16,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:23:16,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:16,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159018641] [2022-03-19 10:23:16,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159018641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:16,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:16,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 10:23:16,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2527171] [2022-03-19 10:23:16,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:16,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 10:23:16,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:16,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 10:23:16,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:23:16,051 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 23 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:23:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:16,154 INFO L93 Difference]: Finished difference Result 72 states and 112 transitions. [2022-03-19 10:23:16,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 10:23:16,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-19 10:23:16,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:16,162 INFO L225 Difference]: With dead ends: 72 [2022-03-19 10:23:16,162 INFO L226 Difference]: Without dead ends: 35 [2022-03-19 10:23:16,164 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 10:23:16,167 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:16,167 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-19 10:23:16,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-03-19 10:23:16,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 10:23:16,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-03-19 10:23:16,204 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 32 [2022-03-19 10:23:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:16,205 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-03-19 10:23:16,206 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:23:16,206 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-03-19 10:23:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 10:23:16,208 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:16,209 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:16,209 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 10:23:16,209 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:16,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 1 times [2022-03-19 10:23:16,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:16,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1671879359] [2022-03-19 10:23:16,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:16,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1734391985, now seen corresponding path program 2 times [2022-03-19 10:23:16,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:16,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225568319] [2022-03-19 10:23:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:16,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:16,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:16,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923057221] [2022-03-19 10:23:16,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:16,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:16,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:16,236 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) [2022-03-19 10:23:16,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 10:23:16,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:23:16,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:16,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:23:16,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:23:16,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:23:16,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:16,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225568319] [2022-03-19 10:23:16,389 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:16,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923057221] [2022-03-19 10:23:16,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923057221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:16,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:16,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:23:16,390 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:16,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1671879359] [2022-03-19 10:23:16,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1671879359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:16,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:16,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-19 10:23:16,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111162044] [2022-03-19 10:23:16,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:16,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-19 10:23:16,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-19 10:23:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:23:16,392 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:23:16,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:16,404 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2022-03-19 10:23:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-19 10:23:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-19 10:23:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:16,406 INFO L225 Difference]: With dead ends: 44 [2022-03-19 10:23:16,406 INFO L226 Difference]: Without dead ends: 36 [2022-03-19 10:23:16,406 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-19 10:23:16,407 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 0 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:16,408 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:16,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-19 10:23:16,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-03-19 10:23:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 10:23:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-03-19 10:23:16,415 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 33 [2022-03-19 10:23:16,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:16,416 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-03-19 10:23:16,417 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:23:16,417 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-03-19 10:23:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-19 10:23:16,417 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:16,418 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:16,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:16,635 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 [2022-03-19 10:23:16,636 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:16,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 1 times [2022-03-19 10:23:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:16,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1592088164] [2022-03-19 10:23:16,637 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:16,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2066454233, now seen corresponding path program 2 times [2022-03-19 10:23:16,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:16,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259167103] [2022-03-19 10:23:16,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:16,654 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:16,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119685956] [2022-03-19 10:23:16,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:16,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:16,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:16,657 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) [2022-03-19 10:23:16,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 10:23:16,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:16,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:16,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:23:16,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:16,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 10:23:16,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 10:23:16,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:16,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259167103] [2022-03-19 10:23:16,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:16,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119685956] [2022-03-19 10:23:16,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119685956] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:16,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:16,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-19 10:23:16,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:16,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1592088164] [2022-03-19 10:23:16,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1592088164] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:16,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:16,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:23:16,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585031307] [2022-03-19 10:23:16,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:16,934 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:23:16,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:23:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 10:23:16,936 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:23:17,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:17,028 INFO L93 Difference]: Finished difference Result 53 states and 71 transitions. [2022-03-19 10:23:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:23:17,029 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2022-03-19 10:23:17,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:17,030 INFO L225 Difference]: With dead ends: 53 [2022-03-19 10:23:17,030 INFO L226 Difference]: Without dead ends: 45 [2022-03-19 10:23:17,030 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:23:17,031 INFO L912 BasicCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:17,031 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 160 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:17,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-19 10:23:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2022-03-19 10:23:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 10:23:17,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-19 10:23:17,039 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 34 [2022-03-19 10:23:17,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:17,039 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-19 10:23:17,040 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:23:17,040 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-19 10:23:17,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-19 10:23:17,040 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:17,041 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:17,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:17,258 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 [2022-03-19 10:23:17,259 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 1 times [2022-03-19 10:23:17,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:17,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1411004686] [2022-03-19 10:23:17,267 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:17,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1678606280, now seen corresponding path program 2 times [2022-03-19 10:23:17,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:17,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460337334] [2022-03-19 10:23:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:17,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:17,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:17,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220763545] [2022-03-19 10:23:17,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:17,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:17,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:17,281 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) [2022-03-19 10:23:17,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 10:23:17,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-19 10:23:17,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:17,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-19 10:23:17,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:23:17,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:23:17,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:17,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460337334] [2022-03-19 10:23:17,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:17,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220763545] [2022-03-19 10:23:17,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220763545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:17,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:17,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:23:17,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:17,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1411004686] [2022-03-19 10:23:17,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1411004686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:17,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:17,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:23:17,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211972752] [2022-03-19 10:23:17,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:17,429 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:23:17,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:17,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:23:17,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:23:17,429 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:23:17,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:17,459 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-03-19 10:23:17,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:23:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2022-03-19 10:23:17,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:17,460 INFO L225 Difference]: With dead ends: 51 [2022-03-19 10:23:17,460 INFO L226 Difference]: Without dead ends: 49 [2022-03-19 10:23:17,461 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 10:23:17,461 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:17,462 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 159 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:17,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-19 10:23:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-03-19 10:23:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 28 states have internal predecessors, (32), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 10:23:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-03-19 10:23:17,469 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 36 [2022-03-19 10:23:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:17,469 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-03-19 10:23:17,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-19 10:23:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-03-19 10:23:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-19 10:23:17,470 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:17,470 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:17,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:17,683 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 [2022-03-19 10:23:17,684 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:17,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:17,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 1 times [2022-03-19 10:23:17,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:17,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235675770] [2022-03-19 10:23:17,685 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:17,685 INFO L85 PathProgramCache]: Analyzing trace with hash -2124209112, now seen corresponding path program 2 times [2022-03-19 10:23:17,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:17,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209160668] [2022-03-19 10:23:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:17,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:17,693 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:17,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367976981] [2022-03-19 10:23:17,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:17,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:17,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:17,698 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) [2022-03-19 10:23:17,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 10:23:17,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:17,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:17,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:23:17,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:17,817 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:23:17,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:23:17,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:17,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209160668] [2022-03-19 10:23:17,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:17,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367976981] [2022-03-19 10:23:17,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367976981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:17,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:17,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:23:17,823 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:17,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235675770] [2022-03-19 10:23:17,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235675770] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:17,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:17,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:23:17,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086101887] [2022-03-19 10:23:17,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:17,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:23:17,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:17,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:23:17,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:23:17,825 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:23:17,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:17,862 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-03-19 10:23:17,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:23:17,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 39 [2022-03-19 10:23:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:17,866 INFO L225 Difference]: With dead ends: 72 [2022-03-19 10:23:17,866 INFO L226 Difference]: Without dead ends: 46 [2022-03-19 10:23:17,867 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:23:17,868 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:17,868 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 133 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-19 10:23:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-19 10:23:17,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 30 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-19 10:23:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-03-19 10:23:17,878 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 39 [2022-03-19 10:23:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:17,879 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-03-19 10:23:17,879 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 10:23:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-03-19 10:23:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-19 10:23:17,880 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:17,880 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:17,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:18,080 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 [2022-03-19 10:23:18,081 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:18,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 1 times [2022-03-19 10:23:18,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:18,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [785277576] [2022-03-19 10:23:18,082 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1052701339, now seen corresponding path program 2 times [2022-03-19 10:23:18,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:18,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026835973] [2022-03-19 10:23:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:18,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:18,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:18,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470445837] [2022-03-19 10:23:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:18,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:18,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:18,098 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) [2022-03-19 10:23:18,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 10:23:18,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:18,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 10:23:18,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-19 10:23:18,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 10:23:18,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:18,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026835973] [2022-03-19 10:23:18,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:18,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470445837] [2022-03-19 10:23:18,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470445837] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:23:18,417 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:23:18,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-19 10:23:18,418 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:18,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [785277576] [2022-03-19 10:23:18,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [785277576] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:18,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:18,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:23:18,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097986851] [2022-03-19 10:23:18,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:18,419 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:23:18,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:18,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:23:18,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:23:18,420 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-19 10:23:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:18,455 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2022-03-19 10:23:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:23:18,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 41 [2022-03-19 10:23:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:18,457 INFO L225 Difference]: With dead ends: 61 [2022-03-19 10:23:18,457 INFO L226 Difference]: Without dead ends: 59 [2022-03-19 10:23:18,458 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:23:18,458 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:18,458 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 169 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:18,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-19 10:23:18,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-03-19 10:23:18,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 37 states have internal predecessors, (42), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 10:23:18,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2022-03-19 10:23:18,467 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 76 transitions. Word has length 41 [2022-03-19 10:23:18,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:18,468 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 76 transitions. [2022-03-19 10:23:18,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-03-19 10:23:18,468 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 76 transitions. [2022-03-19 10:23:18,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-19 10:23:18,469 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:18,469 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:18,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:18,685 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 [2022-03-19 10:23:18,685 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:18,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 1 times [2022-03-19 10:23:18,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:18,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1201876180] [2022-03-19 10:23:18,687 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1531994984, now seen corresponding path program 2 times [2022-03-19 10:23:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:18,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776969291] [2022-03-19 10:23:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:18,694 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:18,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [351422523] [2022-03-19 10:23:18,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:18,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:18,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:18,696 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) [2022-03-19 10:23:18,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 10:23:18,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:18,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:18,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 10:23:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-03-19 10:23:18,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-19 10:23:19,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776969291] [2022-03-19 10:23:19,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351422523] [2022-03-19 10:23:19,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351422523] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 10:23:19,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:23:19,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-03-19 10:23:19,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:19,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1201876180] [2022-03-19 10:23:19,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1201876180] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:19,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:19,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:23:19,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092991561] [2022-03-19 10:23:19,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:19,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:23:19,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:19,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:23:19,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:23:19,021 INFO L87 Difference]: Start difference. First operand 58 states and 76 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:23:19,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:19,066 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2022-03-19 10:23:19,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 10:23:19,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2022-03-19 10:23:19,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:19,067 INFO L225 Difference]: With dead ends: 65 [2022-03-19 10:23:19,067 INFO L226 Difference]: Without dead ends: 63 [2022-03-19 10:23:19,068 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:23:19,068 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:19,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:19,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-19 10:23:19,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-03-19 10:23:19,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 40 states have internal predecessors, (45), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 10:23:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2022-03-19 10:23:19,077 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 46 [2022-03-19 10:23:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:19,078 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2022-03-19 10:23:19,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 10:23:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2022-03-19 10:23:19,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-19 10:23:19,078 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:19,079 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:19,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:19,296 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 [2022-03-19 10:23:19,297 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 1 times [2022-03-19 10:23:19,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:19,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498685133] [2022-03-19 10:23:19,298 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:19,298 INFO L85 PathProgramCache]: Analyzing trace with hash -300711301, now seen corresponding path program 2 times [2022-03-19 10:23:19,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:19,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341827059] [2022-03-19 10:23:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:19,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:19,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:19,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273425659] [2022-03-19 10:23:19,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:19,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:19,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:19,309 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) [2022-03-19 10:23:19,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 10:23:19,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:19,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:19,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 10:23:19,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-03-19 10:23:19,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:19,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341827059] [2022-03-19 10:23:19,614 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:19,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273425659] [2022-03-19 10:23:19,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273425659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:23:19,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:23:19,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-19 10:23:19,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:19,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498685133] [2022-03-19 10:23:19,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498685133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:19,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:19,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:23:19,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669883296] [2022-03-19 10:23:19,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:19,615 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:23:19,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:19,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:23:19,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:23:19,616 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:23:19,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:19,705 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2022-03-19 10:23:19,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:23:19,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-03-19 10:23:19,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:19,707 INFO L225 Difference]: With dead ends: 69 [2022-03-19 10:23:19,707 INFO L226 Difference]: Without dead ends: 67 [2022-03-19 10:23:19,707 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:23:19,707 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:19,708 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 176 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:19,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-19 10:23:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-03-19 10:23:19,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 40 states have (on average 1.2) internal successors, (48), 43 states have internal predecessors, (48), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-19 10:23:19,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-03-19 10:23:19,716 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 51 [2022-03-19 10:23:19,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:19,716 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-03-19 10:23:19,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-03-19 10:23:19,716 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-03-19 10:23:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-19 10:23:19,717 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:19,717 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:19,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:19,934 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 [2022-03-19 10:23:19,935 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:19,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 1 times [2022-03-19 10:23:19,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:19,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1515667241] [2022-03-19 10:23:19,936 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2044027516, now seen corresponding path program 2 times [2022-03-19 10:23:19,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:19,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522756683] [2022-03-19 10:23:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:19,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:19,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:19,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007233444] [2022-03-19 10:23:19,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:19,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:19,944 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) [2022-03-19 10:23:19,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 10:23:19,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:19,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:19,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:23:19,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:23:20,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:23:20,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522756683] [2022-03-19 10:23:20,175 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007233444] [2022-03-19 10:23:20,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007233444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:20,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:20,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-19 10:23:20,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:20,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1515667241] [2022-03-19 10:23:20,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1515667241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:20,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:20,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:23:20,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611395085] [2022-03-19 10:23:20,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:20,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:23:20,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:20,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:23:20,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-19 10:23:20,177 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 10:23:20,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:20,241 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2022-03-19 10:23:20,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:23:20,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 59 [2022-03-19 10:23:20,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:20,243 INFO L225 Difference]: With dead ends: 96 [2022-03-19 10:23:20,243 INFO L226 Difference]: Without dead ends: 94 [2022-03-19 10:23:20,243 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:23:20,244 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:20,244 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 230 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-19 10:23:20,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2022-03-19 10:23:20,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 52 states have internal predecessors, (61), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 10:23:20,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2022-03-19 10:23:20,255 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 59 [2022-03-19 10:23:20,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:20,256 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2022-03-19 10:23:20,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 10:23:20,256 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2022-03-19 10:23:20,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-19 10:23:20,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:20,257 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:20,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:20,467 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 [2022-03-19 10:23:20,468 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:20,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:20,468 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 1 times [2022-03-19 10:23:20,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:20,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1197431456] [2022-03-19 10:23:20,469 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:20,469 INFO L85 PathProgramCache]: Analyzing trace with hash 35160305, now seen corresponding path program 2 times [2022-03-19 10:23:20,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:20,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57914796] [2022-03-19 10:23:20,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:20,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:20,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:20,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456568509] [2022-03-19 10:23:20,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:20,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:20,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:20,479 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) [2022-03-19 10:23:20,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 10:23:20,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:20,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:20,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:23:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:23:20,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:20,725 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:23:20,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57914796] [2022-03-19 10:23:20,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:20,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456568509] [2022-03-19 10:23:20,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456568509] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:20,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:20,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 10:23:20,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:20,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1197431456] [2022-03-19 10:23:20,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1197431456] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:20,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:20,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:23:20,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889174998] [2022-03-19 10:23:20,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:20,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:23:20,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:20,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:23:20,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:23:20,730 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:23:20,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:20,774 INFO L93 Difference]: Finished difference Result 111 states and 135 transitions. [2022-03-19 10:23:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:23:20,775 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 60 [2022-03-19 10:23:20,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:20,777 INFO L225 Difference]: With dead ends: 111 [2022-03-19 10:23:20,777 INFO L226 Difference]: Without dead ends: 103 [2022-03-19 10:23:20,777 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:23:20,778 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:20,779 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-19 10:23:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-19 10:23:20,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.1875) internal successors, (76), 67 states have internal predecessors, (76), 26 states have call successors, (26), 13 states have call predecessors, (26), 12 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 10:23:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions. [2022-03-19 10:23:20,823 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 60 [2022-03-19 10:23:20,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:20,823 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 126 transitions. [2022-03-19 10:23:20,824 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:23:20,824 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions. [2022-03-19 10:23:20,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-19 10:23:20,826 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:20,826 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:20,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:21,044 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 [2022-03-19 10:23:21,044 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:21,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 1 times [2022-03-19 10:23:21,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:21,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [284166150] [2022-03-19 10:23:21,045 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:21,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1088000375, now seen corresponding path program 2 times [2022-03-19 10:23:21,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:21,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352737549] [2022-03-19 10:23:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:21,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:21,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:21,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [816359397] [2022-03-19 10:23:21,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:21,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:21,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:21,054 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) [2022-03-19 10:23:21,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 10:23:21,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:21,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:21,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:23:21,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:21,186 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 10:23:21,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-03-19 10:23:21,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352737549] [2022-03-19 10:23:21,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:21,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816359397] [2022-03-19 10:23:21,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816359397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:21,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:21,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-19 10:23:21,308 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:21,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [284166150] [2022-03-19 10:23:21,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [284166150] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:21,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:21,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:23:21,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476797511] [2022-03-19 10:23:21,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:21,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:23:21,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:21,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:23:21,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-19 10:23:21,310 INFO L87 Difference]: Start difference. First operand 103 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-19 10:23:21,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:21,455 INFO L93 Difference]: Finished difference Result 182 states and 256 transitions. [2022-03-19 10:23:21,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:23:21,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 61 [2022-03-19 10:23:21,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:21,457 INFO L225 Difference]: With dead ends: 182 [2022-03-19 10:23:21,457 INFO L226 Difference]: Without dead ends: 174 [2022-03-19 10:23:21,457 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:23:21,458 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 59 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:21,458 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 390 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:21,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-03-19 10:23:21,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2022-03-19 10:23:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 94 states have internal predecessors, (115), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-19 10:23:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 199 transitions. [2022-03-19 10:23:21,474 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 199 transitions. Word has length 61 [2022-03-19 10:23:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:21,474 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 199 transitions. [2022-03-19 10:23:21,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-19 10:23:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 199 transitions. [2022-03-19 10:23:21,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-19 10:23:21,475 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:21,475 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:21,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:21,691 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 [2022-03-19 10:23:21,691 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:21,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 1 times [2022-03-19 10:23:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:21,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1820941038] [2022-03-19 10:23:21,692 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1537891564, now seen corresponding path program 2 times [2022-03-19 10:23:21,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:21,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824904168] [2022-03-19 10:23:21,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:21,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:21,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:21,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771422763] [2022-03-19 10:23:21,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:21,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:21,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:21,701 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) [2022-03-19 10:23:21,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 10:23:21,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:21,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:21,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-19 10:23:21,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:21,844 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:23:21,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:23:21,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:21,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824904168] [2022-03-19 10:23:21,971 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:21,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771422763] [2022-03-19 10:23:21,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771422763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:21,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:21,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-19 10:23:21,972 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:21,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1820941038] [2022-03-19 10:23:21,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1820941038] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:21,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:21,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 10:23:21,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282888752] [2022-03-19 10:23:21,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:21,973 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 10:23:21,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 10:23:21,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:23:21,973 INFO L87 Difference]: Start difference. First operand 146 states and 199 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:23:22,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:22,014 INFO L93 Difference]: Finished difference Result 183 states and 250 transitions. [2022-03-19 10:23:22,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:23:22,015 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 62 [2022-03-19 10:23:22,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:22,016 INFO L225 Difference]: With dead ends: 183 [2022-03-19 10:23:22,016 INFO L226 Difference]: Without dead ends: 146 [2022-03-19 10:23:22,016 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-03-19 10:23:22,017 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:22,017 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:22,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-19 10:23:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-19 10:23:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 90 states have (on average 1.2666666666666666) internal successors, (114), 94 states have internal predecessors, (114), 43 states have call successors, (43), 13 states have call predecessors, (43), 12 states have return successors, (41), 38 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-19 10:23:22,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2022-03-19 10:23:22,031 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 62 [2022-03-19 10:23:22,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:22,031 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2022-03-19 10:23:22,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:23:22,031 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2022-03-19 10:23:22,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-19 10:23:22,032 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:22,032 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:22,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:22,249 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 [2022-03-19 10:23:22,249 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 1 times [2022-03-19 10:23:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:22,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1022002973] [2022-03-19 10:23:22,250 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash -385934262, now seen corresponding path program 2 times [2022-03-19 10:23:22,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:22,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361893839] [2022-03-19 10:23:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:22,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:22,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450241953] [2022-03-19 10:23:22,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:22,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:22,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:22,259 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) [2022-03-19 10:23:22,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 10:23:22,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:22,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:22,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:23:22,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:23:22,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:22,535 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 5 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-03-19 10:23:22,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:22,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361893839] [2022-03-19 10:23:22,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:22,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450241953] [2022-03-19 10:23:22,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450241953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:22,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:22,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 10:23:22,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:22,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1022002973] [2022-03-19 10:23:22,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1022002973] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:22,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:22,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:23:22,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790108603] [2022-03-19 10:23:22,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:22,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:23:22,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:22,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:23:22,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:23:22,544 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:23:22,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:22,611 INFO L93 Difference]: Finished difference Result 253 states and 351 transitions. [2022-03-19 10:23:22,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:23:22,612 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-03-19 10:23:22,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:22,613 INFO L225 Difference]: With dead ends: 253 [2022-03-19 10:23:22,613 INFO L226 Difference]: Without dead ends: 173 [2022-03-19 10:23:22,614 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:23:22,614 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 35 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:22,614 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 142 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:22,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-19 10:23:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2022-03-19 10:23:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 108 states have (on average 1.2314814814814814) internal successors, (133), 111 states have internal predecessors, (133), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (44), 42 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-19 10:23:22,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-03-19 10:23:22,629 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 66 [2022-03-19 10:23:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:22,630 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-03-19 10:23:22,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-19 10:23:22,630 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-03-19 10:23:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-19 10:23:22,630 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:22,630 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:22,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:22,848 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 [2022-03-19 10:23:22,848 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:22,849 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 1 times [2022-03-19 10:23:22,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:22,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1298163688] [2022-03-19 10:23:22,849 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash 792554045, now seen corresponding path program 2 times [2022-03-19 10:23:22,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:22,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696644091] [2022-03-19 10:23:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:22,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:22,856 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:22,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1669276580] [2022-03-19 10:23:22,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:22,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:22,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:22,863 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) [2022-03-19 10:23:22,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 10:23:22,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:22,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:22,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-19 10:23:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:23,075 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:23:23,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 10:23:23,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:23,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696644091] [2022-03-19 10:23:23,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:23,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669276580] [2022-03-19 10:23:23,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669276580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:23,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:23,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-03-19 10:23:23,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:23,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1298163688] [2022-03-19 10:23:23,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1298163688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:23,242 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:23,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:23:23,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562832087] [2022-03-19 10:23:23,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:23,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:23:23,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:23,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:23:23,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-19 10:23:23,243 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-19 10:23:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:23,401 INFO L93 Difference]: Finished difference Result 195 states and 259 transitions. [2022-03-19 10:23:23,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 10:23:23,401 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2022-03-19 10:23:23,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:23,403 INFO L225 Difference]: With dead ends: 195 [2022-03-19 10:23:23,403 INFO L226 Difference]: Without dead ends: 193 [2022-03-19 10:23:23,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:23:23,404 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 23 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:23,404 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 277 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-19 10:23:23,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 190. [2022-03-19 10:23:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 117 states have (on average 1.2478632478632479) internal successors, (146), 121 states have internal predecessors, (146), 55 states have call successors, (55), 18 states have call predecessors, (55), 17 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-19 10:23:23,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 254 transitions. [2022-03-19 10:23:23,421 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 254 transitions. Word has length 68 [2022-03-19 10:23:23,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:23,421 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 254 transitions. [2022-03-19 10:23:23,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-03-19 10:23:23,421 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 254 transitions. [2022-03-19 10:23:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-19 10:23:23,422 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:23,422 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:23,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:23,635 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 [2022-03-19 10:23:23,635 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:23,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 3 times [2022-03-19 10:23:23,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:23,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1088377772] [2022-03-19 10:23:23,636 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:23,636 INFO L85 PathProgramCache]: Analyzing trace with hash 783638790, now seen corresponding path program 4 times [2022-03-19 10:23:23,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:23,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93577485] [2022-03-19 10:23:23,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:23,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:23,644 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1717763251] [2022-03-19 10:23:23,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:23:23,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:23,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:23,647 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) [2022-03-19 10:23:23,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 10:23:23,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:23:23,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:23,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 10:23:23,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:24,108 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 12 proven. 17 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-03-19 10:23:24,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93577485] [2022-03-19 10:23:24,252 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:24,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717763251] [2022-03-19 10:23:24,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717763251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:23:24,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:23:24,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 10:23:24,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:24,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1088377772] [2022-03-19 10:23:24,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1088377772] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:24,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:24,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:23:24,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536035001] [2022-03-19 10:23:24,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:24,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:23:24,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:24,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:23:24,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-19 10:23:24,254 INFO L87 Difference]: Start difference. First operand 190 states and 254 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 10:23:24,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:24,438 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions. [2022-03-19 10:23:24,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:23:24,438 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2022-03-19 10:23:24,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:24,439 INFO L225 Difference]: With dead ends: 199 [2022-03-19 10:23:24,440 INFO L226 Difference]: Without dead ends: 197 [2022-03-19 10:23:24,440 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:23:24,440 INFO L912 BasicCegarLoop]: 51 mSDtfsCounter, 49 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:24,440 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 320 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:24,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-19 10:23:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 194. [2022-03-19 10:23:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 124 states have internal predecessors, (149), 55 states have call successors, (55), 19 states have call predecessors, (55), 18 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-19 10:23:24,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 257 transitions. [2022-03-19 10:23:24,457 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 257 transitions. Word has length 73 [2022-03-19 10:23:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:24,457 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 257 transitions. [2022-03-19 10:23:24,457 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-03-19 10:23:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 257 transitions. [2022-03-19 10:23:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-19 10:23:24,458 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:24,458 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:24,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:24,675 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 [2022-03-19 10:23:24,676 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:24,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 5 times [2022-03-19 10:23:24,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:24,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1957642737] [2022-03-19 10:23:24,677 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1625446301, now seen corresponding path program 6 times [2022-03-19 10:23:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:24,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382384334] [2022-03-19 10:23:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:24,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:24,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:24,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606633924] [2022-03-19 10:23:24,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:23:24,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:24,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:24,690 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) [2022-03-19 10:23:24,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 10:23:24,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:23:24,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-19 10:23:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-03-19 10:23:25,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:26,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:26,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382384334] [2022-03-19 10:23:26,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:26,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606633924] [2022-03-19 10:23:26,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606633924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:23:26,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:23:26,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-19 10:23:26,020 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:26,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1957642737] [2022-03-19 10:23:26,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1957642737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:26,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:26,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:23:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516617151] [2022-03-19 10:23:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:26,020 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:23:26,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:23:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-19 10:23:26,021 INFO L87 Difference]: Start difference. First operand 194 states and 257 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 10:23:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:27,045 INFO L93 Difference]: Finished difference Result 203 states and 265 transitions. [2022-03-19 10:23:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:23:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 78 [2022-03-19 10:23:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:27,047 INFO L225 Difference]: With dead ends: 203 [2022-03-19 10:23:27,047 INFO L226 Difference]: Without dead ends: 201 [2022-03-19 10:23:27,047 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:23:27,048 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 56 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:27,048 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 250 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 10:23:27,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-19 10:23:27,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2022-03-19 10:23:27,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 123 states have (on average 1.2357723577235773) internal successors, (152), 127 states have internal predecessors, (152), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (53), 50 states have call predecessors, (53), 53 states have call successors, (53) [2022-03-19 10:23:27,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 260 transitions. [2022-03-19 10:23:27,064 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 260 transitions. Word has length 78 [2022-03-19 10:23:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:27,064 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 260 transitions. [2022-03-19 10:23:27,064 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 11 states have internal predecessors, (31), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-03-19 10:23:27,064 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 260 transitions. [2022-03-19 10:23:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-19 10:23:27,065 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:27,065 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:27,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:27,279 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 [2022-03-19 10:23:27,279 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:27,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 3 times [2022-03-19 10:23:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [953033439] [2022-03-19 10:23:27,280 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:27,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1849570232, now seen corresponding path program 4 times [2022-03-19 10:23:27,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:27,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363011934] [2022-03-19 10:23:27,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:27,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:27,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:27,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692623241] [2022-03-19 10:23:27,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:23:27,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:27,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:27,288 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) [2022-03-19 10:23:27,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 10:23:27,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:23:27,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:27,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-19 10:23:27,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:27,609 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 30 proven. 29 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-03-19 10:23:27,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-03-19 10:23:27,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:27,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363011934] [2022-03-19 10:23:27,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:27,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692623241] [2022-03-19 10:23:27,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692623241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:27,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:27,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-03-19 10:23:27,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:27,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [953033439] [2022-03-19 10:23:27,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [953033439] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:27,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:27,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:23:27,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000041530] [2022-03-19 10:23:27,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:27,780 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:23:27,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:27,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:23:27,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:23:27,781 INFO L87 Difference]: Start difference. First operand 198 states and 260 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:23:28,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:28,180 INFO L93 Difference]: Finished difference Result 212 states and 278 transitions. [2022-03-19 10:23:28,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:23:28,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 82 [2022-03-19 10:23:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:28,182 INFO L225 Difference]: With dead ends: 212 [2022-03-19 10:23:28,182 INFO L226 Difference]: Without dead ends: 210 [2022-03-19 10:23:28,182 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:23:28,182 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:28,183 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 333 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 10:23:28,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-19 10:23:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2022-03-19 10:23:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 126 states have (on average 1.2301587301587302) internal successors, (155), 131 states have internal predecessors, (155), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-19 10:23:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-03-19 10:23:28,200 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 82 [2022-03-19 10:23:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:28,200 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-03-19 10:23:28,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 10:23:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-03-19 10:23:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-19 10:23:28,201 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:28,201 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:28,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:28,415 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 [2022-03-19 10:23:28,416 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:28,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:28,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 1 times [2022-03-19 10:23:28,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:28,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1295086862] [2022-03-19 10:23:28,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:28,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1768368813, now seen corresponding path program 2 times [2022-03-19 10:23:28,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:28,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554101398] [2022-03-19 10:23:28,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:28,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:28,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:28,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627481601] [2022-03-19 10:23:28,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:28,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:28,425 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) [2022-03-19 10:23:28,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-19 10:23:28,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:28,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:28,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-19 10:23:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 73 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 10:23:28,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 10:23:28,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554101398] [2022-03-19 10:23:28,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627481601] [2022-03-19 10:23:28,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627481601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:28,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:28,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-19 10:23:28,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1295086862] [2022-03-19 10:23:28,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1295086862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:28,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:28,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:23:28,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78168114] [2022-03-19 10:23:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:28,736 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:23:28,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:23:28,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:23:28,737 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:23:28,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:28,808 INFO L93 Difference]: Finished difference Result 214 states and 277 transitions. [2022-03-19 10:23:28,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:23:28,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-03-19 10:23:28,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:28,810 INFO L225 Difference]: With dead ends: 214 [2022-03-19 10:23:28,810 INFO L226 Difference]: Without dead ends: 206 [2022-03-19 10:23:28,810 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:23:28,811 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 13 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:28,811 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-19 10:23:28,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-03-19 10:23:28,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 134 states have internal predecessors, (158), 56 states have call successors, (56), 21 states have call predecessors, (56), 20 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-03-19 10:23:28,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 268 transitions. [2022-03-19 10:23:28,828 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 268 transitions. Word has length 83 [2022-03-19 10:23:28,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:28,828 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 268 transitions. [2022-03-19 10:23:28,828 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:23:28,828 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 268 transitions. [2022-03-19 10:23:28,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-19 10:23:28,829 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:28,829 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:28,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-03-19 10:23:29,043 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 [2022-03-19 10:23:29,044 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:29,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:29,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 1 times [2022-03-19 10:23:29,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:29,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [549261274] [2022-03-19 10:23:29,044 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1017110725, now seen corresponding path program 2 times [2022-03-19 10:23:29,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:29,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889637296] [2022-03-19 10:23:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:29,050 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:29,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177179824] [2022-03-19 10:23:29,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:29,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:29,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:29,058 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) [2022-03-19 10:23:29,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-19 10:23:29,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:29,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:29,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-19 10:23:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 10:23:29,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 10:23:29,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889637296] [2022-03-19 10:23:29,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:29,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177179824] [2022-03-19 10:23:29,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177179824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:29,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:29,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 10:23:29,824 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:29,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [549261274] [2022-03-19 10:23:29,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [549261274] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:29,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:29,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:23:29,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123649950] [2022-03-19 10:23:29,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:29,825 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:23:29,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:29,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:23:29,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:23:29,825 INFO L87 Difference]: Start difference. First operand 206 states and 268 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:23:30,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:30,032 INFO L93 Difference]: Finished difference Result 234 states and 311 transitions. [2022-03-19 10:23:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 10:23:30,033 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 84 [2022-03-19 10:23:30,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:30,034 INFO L225 Difference]: With dead ends: 234 [2022-03-19 10:23:30,034 INFO L226 Difference]: Without dead ends: 232 [2022-03-19 10:23:30,034 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:23:30,035 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 25 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:30,035 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 401 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-19 10:23:30,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 229. [2022-03-19 10:23:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 141 states have (on average 1.24822695035461) internal successors, (176), 148 states have internal predecessors, (176), 66 states have call successors, (66), 22 states have call predecessors, (66), 21 states have return successors, (64), 58 states have call predecessors, (64), 64 states have call successors, (64) [2022-03-19 10:23:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 306 transitions. [2022-03-19 10:23:30,054 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 306 transitions. Word has length 84 [2022-03-19 10:23:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:30,054 INFO L478 AbstractCegarLoop]: Abstraction has 229 states and 306 transitions. [2022-03-19 10:23:30,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:23:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 306 transitions. [2022-03-19 10:23:30,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-19 10:23:30,055 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:30,055 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:30,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:30,272 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 [2022-03-19 10:23:30,273 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:30,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:30,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 3 times [2022-03-19 10:23:30,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:30,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [317851522] [2022-03-19 10:23:30,274 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1676300815, now seen corresponding path program 4 times [2022-03-19 10:23:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:30,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806807215] [2022-03-19 10:23:30,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:30,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:30,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651692414] [2022-03-19 10:23:30,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:23:30,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:30,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:30,293 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) [2022-03-19 10:23:30,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-19 10:23:30,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:23:30,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-19 10:23:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:30,429 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 10:23:30,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 10:23:30,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:30,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806807215] [2022-03-19 10:23:30,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:30,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651692414] [2022-03-19 10:23:30,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651692414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:30,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:30,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:23:30,431 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:30,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [317851522] [2022-03-19 10:23:30,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [317851522] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:30,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:30,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 10:23:30,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593396828] [2022-03-19 10:23:30,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:30,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 10:23:30,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:30,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 10:23:30,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 10:23:30,432 INFO L87 Difference]: Start difference. First operand 229 states and 306 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-19 10:23:30,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:30,517 INFO L93 Difference]: Finished difference Result 371 states and 532 transitions. [2022-03-19 10:23:30,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 10:23:30,527 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 87 [2022-03-19 10:23:30,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:30,529 INFO L225 Difference]: With dead ends: 371 [2022-03-19 10:23:30,529 INFO L226 Difference]: Without dead ends: 291 [2022-03-19 10:23:30,530 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-19 10:23:30,530 INFO L912 BasicCegarLoop]: 61 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:30,530 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 197 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-19 10:23:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2022-03-19 10:23:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 161 states have (on average 1.2546583850931676) internal successors, (202), 168 states have internal predecessors, (202), 74 states have call successors, (74), 22 states have call predecessors, (74), 21 states have return successors, (72), 66 states have call predecessors, (72), 72 states have call successors, (72) [2022-03-19 10:23:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 348 transitions. [2022-03-19 10:23:30,553 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 348 transitions. Word has length 87 [2022-03-19 10:23:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:30,553 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 348 transitions. [2022-03-19 10:23:30,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-19 10:23:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 348 transitions. [2022-03-19 10:23:30,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 10:23:30,554 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:30,554 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:30,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:30,771 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 [2022-03-19 10:23:30,771 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 1 times [2022-03-19 10:23:30,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:30,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1070957593] [2022-03-19 10:23:30,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1175887352, now seen corresponding path program 2 times [2022-03-19 10:23:30,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:30,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617867729] [2022-03-19 10:23:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:30,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:30,778 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:30,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735552931] [2022-03-19 10:23:30,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:30,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:30,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:30,780 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) [2022-03-19 10:23:30,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-19 10:23:30,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:30,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:30,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 10:23:30,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:30,993 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 37 proven. 10 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-19 10:23:30,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:31,153 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 40 proven. 7 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-03-19 10:23:31,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:31,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617867729] [2022-03-19 10:23:31,154 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:31,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735552931] [2022-03-19 10:23:31,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735552931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:31,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:31,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-19 10:23:31,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:31,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1070957593] [2022-03-19 10:23:31,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1070957593] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:31,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:31,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:23:31,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437926691] [2022-03-19 10:23:31,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:31,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:23:31,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:31,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:23:31,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-19 10:23:31,156 INFO L87 Difference]: Start difference. First operand 257 states and 348 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:23:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:31,288 INFO L93 Difference]: Finished difference Result 301 states and 415 transitions. [2022-03-19 10:23:31,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 10:23:31,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2022-03-19 10:23:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:31,290 INFO L225 Difference]: With dead ends: 301 [2022-03-19 10:23:31,290 INFO L226 Difference]: Without dead ends: 297 [2022-03-19 10:23:31,291 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:23:31,291 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 25 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:31,291 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 268 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:31,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-19 10:23:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 293. [2022-03-19 10:23:31,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 183 states have (on average 1.273224043715847) internal successors, (233), 191 states have internal predecessors, (233), 87 states have call successors, (87), 23 states have call predecessors, (87), 22 states have return successors, (84), 78 states have call predecessors, (84), 84 states have call successors, (84) [2022-03-19 10:23:31,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 404 transitions. [2022-03-19 10:23:31,317 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 404 transitions. Word has length 89 [2022-03-19 10:23:31,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:31,317 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 404 transitions. [2022-03-19 10:23:31,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 10:23:31,317 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 404 transitions. [2022-03-19 10:23:31,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-19 10:23:31,318 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:31,318 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:31,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:31,531 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 [2022-03-19 10:23:31,531 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:31,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:31,532 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 1 times [2022-03-19 10:23:31,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:31,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051077079] [2022-03-19 10:23:31,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:31,532 INFO L85 PathProgramCache]: Analyzing trace with hash -201422586, now seen corresponding path program 2 times [2022-03-19 10:23:31,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:31,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037592411] [2022-03-19 10:23:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:31,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:31,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:31,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150193409] [2022-03-19 10:23:31,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:31,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:31,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:31,539 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) [2022-03-19 10:23:31,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-19 10:23:31,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:31,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:23:31,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:31,727 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-03-19 10:23:31,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 21 proven. 14 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-03-19 10:23:31,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:31,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037592411] [2022-03-19 10:23:31,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150193409] [2022-03-19 10:23:31,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150193409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:31,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:31,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 10:23:31,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:31,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051077079] [2022-03-19 10:23:31,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051077079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:31,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:31,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:23:31,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817846786] [2022-03-19 10:23:31,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:31,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:23:31,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:31,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:23:31,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:23:31,880 INFO L87 Difference]: Start difference. First operand 293 states and 404 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:23:31,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:31,974 INFO L93 Difference]: Finished difference Result 463 states and 647 transitions. [2022-03-19 10:23:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:23:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) Word has length 89 [2022-03-19 10:23:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:31,979 INFO L225 Difference]: With dead ends: 463 [2022-03-19 10:23:31,979 INFO L226 Difference]: Without dead ends: 329 [2022-03-19 10:23:31,979 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:23:31,980 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 44 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:31,980 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 169 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-19 10:23:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 327. [2022-03-19 10:23:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 207 states have (on average 1.2367149758454106) internal successors, (256), 214 states have internal predecessors, (256), 90 states have call successors, (90), 30 states have call predecessors, (90), 29 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-19 10:23:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 433 transitions. [2022-03-19 10:23:32,007 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 433 transitions. Word has length 89 [2022-03-19 10:23:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:32,007 INFO L478 AbstractCegarLoop]: Abstraction has 327 states and 433 transitions. [2022-03-19 10:23:32,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 5 states have call successors, (15), 5 states have call predecessors, (15), 3 states have return successors, (13), 3 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-19 10:23:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 433 transitions. [2022-03-19 10:23:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-19 10:23:32,008 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:32,008 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:32,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:32,218 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 [2022-03-19 10:23:32,219 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:32,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 1 times [2022-03-19 10:23:32,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:32,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1000217006] [2022-03-19 10:23:32,220 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1415088729, now seen corresponding path program 2 times [2022-03-19 10:23:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:32,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725814720] [2022-03-19 10:23:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:32,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:32,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:32,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425111557] [2022-03-19 10:23:32,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:23:32,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:32,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:32,227 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) [2022-03-19 10:23:32,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-19 10:23:32,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:23:32,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:32,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-19 10:23:32,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 84 proven. 53 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-03-19 10:23:35,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:36,034 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:23:37,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:37,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725814720] [2022-03-19 10:23:37,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:37,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425111557] [2022-03-19 10:23:37,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425111557] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:23:37,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:23:37,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 10:23:37,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:37,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1000217006] [2022-03-19 10:23:37,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1000217006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:37,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:37,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:23:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463110911] [2022-03-19 10:23:37,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:37,564 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:23:37,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:37,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:23:37,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:23:37,565 INFO L87 Difference]: Start difference. First operand 327 states and 433 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 10:23:38,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:38,722 INFO L93 Difference]: Finished difference Result 339 states and 443 transitions. [2022-03-19 10:23:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:23:38,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 101 [2022-03-19 10:23:38,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:38,725 INFO L225 Difference]: With dead ends: 339 [2022-03-19 10:23:38,725 INFO L226 Difference]: Without dead ends: 337 [2022-03-19 10:23:38,725 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:23:38,725 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 59 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:38,726 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 346 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 10:23:38,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-03-19 10:23:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2022-03-19 10:23:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 213 states have (on average 1.2300469483568075) internal successors, (262), 220 states have internal predecessors, (262), 90 states have call successors, (90), 32 states have call predecessors, (90), 31 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-19 10:23:38,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 439 transitions. [2022-03-19 10:23:38,754 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 439 transitions. Word has length 101 [2022-03-19 10:23:38,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:38,754 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 439 transitions. [2022-03-19 10:23:38,754 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 10:23:38,755 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 439 transitions. [2022-03-19 10:23:38,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 10:23:38,755 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:38,755 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:38,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-19 10:23:38,979 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 [2022-03-19 10:23:38,979 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:38,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 5 times [2022-03-19 10:23:38,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:38,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1734960630] [2022-03-19 10:23:38,980 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:38,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1524088572, now seen corresponding path program 6 times [2022-03-19 10:23:38,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:38,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573579003] [2022-03-19 10:23:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:38,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:38,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:38,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990795475] [2022-03-19 10:23:38,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:23:38,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:38,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:38,987 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) [2022-03-19 10:23:38,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-19 10:23:39,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:23:39,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:39,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-19 10:23:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:23:39,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:39,357 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 64 proven. 10 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:23:39,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573579003] [2022-03-19 10:23:39,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:39,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990795475] [2022-03-19 10:23:39,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990795475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:39,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:39,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-03-19 10:23:39,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:39,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1734960630] [2022-03-19 10:23:39,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1734960630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:39,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:39,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:23:39,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445282586] [2022-03-19 10:23:39,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:39,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:23:39,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:23:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-19 10:23:39,360 INFO L87 Difference]: Start difference. First operand 335 states and 439 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-19 10:23:39,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:39,446 INFO L93 Difference]: Finished difference Result 341 states and 444 transitions. [2022-03-19 10:23:39,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 10:23:39,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 105 [2022-03-19 10:23:39,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:39,448 INFO L225 Difference]: With dead ends: 341 [2022-03-19 10:23:39,448 INFO L226 Difference]: Without dead ends: 339 [2022-03-19 10:23:39,448 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 200 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-03-19 10:23:39,449 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:39,449 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 176 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 10:23:39,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-03-19 10:23:39,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 339. [2022-03-19 10:23:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 216 states have (on average 1.2268518518518519) internal successors, (265), 223 states have internal predecessors, (265), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-19 10:23:39,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 442 transitions. [2022-03-19 10:23:39,480 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 442 transitions. Word has length 105 [2022-03-19 10:23:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:39,481 INFO L478 AbstractCegarLoop]: Abstraction has 339 states and 442 transitions. [2022-03-19 10:23:39,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2022-03-19 10:23:39,481 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 442 transitions. [2022-03-19 10:23:39,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-19 10:23:39,481 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:39,482 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:39,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:39,695 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 [2022-03-19 10:23:39,695 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:39,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 3 times [2022-03-19 10:23:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:39,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1440489631] [2022-03-19 10:23:39,696 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1026601615, now seen corresponding path program 4 times [2022-03-19 10:23:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:39,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787027872] [2022-03-19 10:23:39,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:39,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:39,704 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:39,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592795333] [2022-03-19 10:23:39,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:23:39,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:39,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:39,706 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) [2022-03-19 10:23:39,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-19 10:23:39,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:23:39,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-19 10:23:39,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:39,932 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 215 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-19 10:23:39,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 10:23:40,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:40,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787027872] [2022-03-19 10:23:40,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:40,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592795333] [2022-03-19 10:23:40,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592795333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:40,119 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:40,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-19 10:23:40,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:40,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1440489631] [2022-03-19 10:23:40,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1440489631] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:40,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:40,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 10:23:40,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604865816] [2022-03-19 10:23:40,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:40,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 10:23:40,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:40,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 10:23:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:23:40,121 INFO L87 Difference]: Start difference. First operand 339 states and 442 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 10:23:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:40,231 INFO L93 Difference]: Finished difference Result 349 states and 452 transitions. [2022-03-19 10:23:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:23:40,231 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 106 [2022-03-19 10:23:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:40,233 INFO L225 Difference]: With dead ends: 349 [2022-03-19 10:23:40,233 INFO L226 Difference]: Without dead ends: 342 [2022-03-19 10:23:40,234 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:23:40,235 INFO L912 BasicCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:40,235 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 164 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:40,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-19 10:23:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2022-03-19 10:23:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 219 states have (on average 1.2237442922374429) internal successors, (268), 226 states have internal predecessors, (268), 90 states have call successors, (90), 33 states have call predecessors, (90), 32 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-03-19 10:23:40,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 445 transitions. [2022-03-19 10:23:40,288 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 445 transitions. Word has length 106 [2022-03-19 10:23:40,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:40,288 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 445 transitions. [2022-03-19 10:23:40,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 10:23:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 445 transitions. [2022-03-19 10:23:40,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-19 10:23:40,290 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:40,290 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:40,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:40,503 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 [2022-03-19 10:23:40,503 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 3 times [2022-03-19 10:23:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:40,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [623352016] [2022-03-19 10:23:40,504 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1761848073, now seen corresponding path program 4 times [2022-03-19 10:23:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:40,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216162139] [2022-03-19 10:23:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:40,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:40,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834865285] [2022-03-19 10:23:40,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:23:40,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:40,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:40,514 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) [2022-03-19 10:23:40,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-19 10:23:40,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:23:40,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-19 10:23:40,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-19 10:23:42,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:42,894 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:23:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2022-03-19 10:23:47,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216162139] [2022-03-19 10:23:47,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834865285] [2022-03-19 10:23:47,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834865285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:47,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:47,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-19 10:23:47,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:47,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [623352016] [2022-03-19 10:23:47,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [623352016] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:47,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:47,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:23:47,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133832448] [2022-03-19 10:23:47,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:47,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:23:47,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:47,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:23:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=414, Unknown=2, NotChecked=0, Total=506 [2022-03-19 10:23:47,944 INFO L87 Difference]: Start difference. First operand 342 states and 445 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:23:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:49,077 INFO L93 Difference]: Finished difference Result 369 states and 485 transitions. [2022-03-19 10:23:49,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:23:49,077 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 107 [2022-03-19 10:23:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:49,079 INFO L225 Difference]: With dead ends: 369 [2022-03-19 10:23:49,079 INFO L226 Difference]: Without dead ends: 366 [2022-03-19 10:23:49,080 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=140, Invalid=614, Unknown=2, NotChecked=0, Total=756 [2022-03-19 10:23:49,080 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 36 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:49,080 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 512 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 10:23:49,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-19 10:23:49,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 364. [2022-03-19 10:23:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 231 states have (on average 1.2294372294372293) internal successors, (284), 239 states have internal predecessors, (284), 99 states have call successors, (99), 34 states have call predecessors, (99), 33 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-03-19 10:23:49,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 479 transitions. [2022-03-19 10:23:49,117 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 479 transitions. Word has length 107 [2022-03-19 10:23:49,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:49,117 INFO L478 AbstractCegarLoop]: Abstraction has 364 states and 479 transitions. [2022-03-19 10:23:49,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 states have internal predecessors, (32), 7 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:23:49,117 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 479 transitions. [2022-03-19 10:23:49,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-19 10:23:49,118 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:49,118 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:49,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:49,328 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 [2022-03-19 10:23:49,328 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 5 times [2022-03-19 10:23:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:49,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2071130949] [2022-03-19 10:23:49,329 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1514731471, now seen corresponding path program 6 times [2022-03-19 10:23:49,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:49,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82898368] [2022-03-19 10:23:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:49,335 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:49,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [47489993] [2022-03-19 10:23:49,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:23:49,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:49,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:49,338 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) [2022-03-19 10:23:49,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-19 10:23:49,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:23:49,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:49,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:23:49,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 221 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-19 10:23:49,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:49,821 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 10:23:49,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:49,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82898368] [2022-03-19 10:23:49,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:49,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47489993] [2022-03-19 10:23:49,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47489993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:49,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:49,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 10:23:49,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:49,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2071130949] [2022-03-19 10:23:49,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2071130949] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:49,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:49,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:23:49,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169421352] [2022-03-19 10:23:49,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:49,823 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:23:49,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:49,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:23:49,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:23:49,823 INFO L87 Difference]: Start difference. First operand 364 states and 479 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 10:23:49,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:49,947 INFO L93 Difference]: Finished difference Result 434 states and 549 transitions. [2022-03-19 10:23:49,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:23:49,947 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 110 [2022-03-19 10:23:49,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:49,949 INFO L225 Difference]: With dead ends: 434 [2022-03-19 10:23:49,949 INFO L226 Difference]: Without dead ends: 425 [2022-03-19 10:23:49,950 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=227, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:23:49,950 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 42 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:49,950 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 211 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:49,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-19 10:23:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 423. [2022-03-19 10:23:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 272 states have (on average 1.2022058823529411) internal successors, (327), 279 states have internal predecessors, (327), 106 states have call successors, (106), 45 states have call predecessors, (106), 44 states have return successors, (103), 98 states have call predecessors, (103), 103 states have call successors, (103) [2022-03-19 10:23:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 536 transitions. [2022-03-19 10:23:50,003 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 536 transitions. Word has length 110 [2022-03-19 10:23:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:50,004 INFO L478 AbstractCegarLoop]: Abstraction has 423 states and 536 transitions. [2022-03-19 10:23:50,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 10:23:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 536 transitions. [2022-03-19 10:23:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-19 10:23:50,005 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:50,005 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:50,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-19 10:23:50,209 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 [2022-03-19 10:23:50,209 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 5 times [2022-03-19 10:23:50,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:50,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [983376160] [2022-03-19 10:23:50,210 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:50,210 INFO L85 PathProgramCache]: Analyzing trace with hash -289933735, now seen corresponding path program 6 times [2022-03-19 10:23:50,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:50,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720717647] [2022-03-19 10:23:50,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:50,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:50,215 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:50,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1627186686] [2022-03-19 10:23:50,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:23:50,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:50,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:50,217 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) [2022-03-19 10:23:50,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-19 10:23:50,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:23:50,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 10:23:50,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 10:23:50,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 10:23:50,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720717647] [2022-03-19 10:23:50,552 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627186686] [2022-03-19 10:23:50,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627186686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:50,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:50,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-03-19 10:23:50,552 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:50,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [983376160] [2022-03-19 10:23:50,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [983376160] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:50,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:50,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-19 10:23:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287495753] [2022-03-19 10:23:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:50,553 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-19 10:23:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-19 10:23:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-19 10:23:50,554 INFO L87 Difference]: Start difference. First operand 423 states and 536 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-19 10:23:50,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:50,854 INFO L93 Difference]: Finished difference Result 589 states and 810 transitions. [2022-03-19 10:23:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:23:50,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 111 [2022-03-19 10:23:50,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:50,857 INFO L225 Difference]: With dead ends: 589 [2022-03-19 10:23:50,857 INFO L226 Difference]: Without dead ends: 581 [2022-03-19 10:23:50,857 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-03-19 10:23:50,858 INFO L912 BasicCegarLoop]: 107 mSDtfsCounter, 32 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:50,858 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 454 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:23:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-03-19 10:23:50,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 470. [2022-03-19 10:23:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 301 states have (on average 1.2259136212624584) internal successors, (369), 306 states have internal predecessors, (369), 124 states have call successors, (124), 45 states have call predecessors, (124), 44 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-19 10:23:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 614 transitions. [2022-03-19 10:23:50,907 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 614 transitions. Word has length 111 [2022-03-19 10:23:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:50,907 INFO L478 AbstractCegarLoop]: Abstraction has 470 states and 614 transitions. [2022-03-19 10:23:50,907 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-03-19 10:23:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 614 transitions. [2022-03-19 10:23:50,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-19 10:23:50,910 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:50,910 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:50,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:51,119 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 [2022-03-19 10:23:51,120 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 3 times [2022-03-19 10:23:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:51,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240392867] [2022-03-19 10:23:51,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1282766646, now seen corresponding path program 4 times [2022-03-19 10:23:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:51,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950441994] [2022-03-19 10:23:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:51,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:51,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270924229] [2022-03-19 10:23:51,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:23:51,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:51,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:51,132 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) [2022-03-19 10:23:51,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-19 10:23:51,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:23:51,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:51,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-19 10:23:51,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 222 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-19 10:23:51,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 29 proven. 30 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 10:23:51,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950441994] [2022-03-19 10:23:51,572 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270924229] [2022-03-19 10:23:51,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270924229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:51,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:51,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-19 10:23:51,572 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240392867] [2022-03-19 10:23:51,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240392867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:51,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:51,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 10:23:51,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914021516] [2022-03-19 10:23:51,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:51,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 10:23:51,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:51,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 10:23:51,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-19 10:23:51,574 INFO L87 Difference]: Start difference. First operand 470 states and 614 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 10:23:51,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:51,741 INFO L93 Difference]: Finished difference Result 644 states and 881 transitions. [2022-03-19 10:23:51,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:23:51,741 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 112 [2022-03-19 10:23:51,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:51,743 INFO L225 Difference]: With dead ends: 644 [2022-03-19 10:23:51,743 INFO L226 Difference]: Without dead ends: 474 [2022-03-19 10:23:51,745 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:23:51,748 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 73 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:51,749 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 172 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:51,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-19 10:23:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 474. [2022-03-19 10:23:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 305 states have (on average 1.2163934426229508) internal successors, (371), 310 states have internal predecessors, (371), 124 states have call successors, (124), 45 states have call predecessors, (124), 44 states have return successors, (121), 118 states have call predecessors, (121), 121 states have call successors, (121) [2022-03-19 10:23:51,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 616 transitions. [2022-03-19 10:23:51,795 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 616 transitions. Word has length 112 [2022-03-19 10:23:51,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:51,795 INFO L478 AbstractCegarLoop]: Abstraction has 474 states and 616 transitions. [2022-03-19 10:23:51,795 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 10:23:51,795 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 616 transitions. [2022-03-19 10:23:51,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 10:23:51,796 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:51,796 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:51,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:52,007 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 [2022-03-19 10:23:52,007 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:52,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 5 times [2022-03-19 10:23:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:52,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1489989463] [2022-03-19 10:23:52,008 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:52,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1546024104, now seen corresponding path program 6 times [2022-03-19 10:23:52,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:52,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227229852] [2022-03-19 10:23:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:52,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:52,014 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:52,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913946740] [2022-03-19 10:23:52,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:23:52,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:52,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:52,015 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) [2022-03-19 10:23:52,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-19 10:23:52,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:23:52,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:52,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:23:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2022-03-19 10:23:52,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 10:23:52,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227229852] [2022-03-19 10:23:52,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913946740] [2022-03-19 10:23:52,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913946740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:52,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:52,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 10:23:52,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:52,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1489989463] [2022-03-19 10:23:52,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1489989463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:52,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:52,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:23:52,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243212032] [2022-03-19 10:23:52,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:52,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:23:52,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:52,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:23:52,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:23:52,501 INFO L87 Difference]: Start difference. First operand 474 states and 616 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 10:23:52,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:52,697 INFO L93 Difference]: Finished difference Result 731 states and 966 transitions. [2022-03-19 10:23:52,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:23:52,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) Word has length 116 [2022-03-19 10:23:52,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:52,700 INFO L225 Difference]: With dead ends: 731 [2022-03-19 10:23:52,700 INFO L226 Difference]: Without dead ends: 561 [2022-03-19 10:23:52,701 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=301, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:23:52,702 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 86 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:52,702 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 231 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:23:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-03-19 10:23:52,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 553. [2022-03-19 10:23:52,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 361 states have (on average 1.1911357340720221) internal successors, (430), 367 states have internal predecessors, (430), 133 states have call successors, (133), 59 states have call predecessors, (133), 58 states have return successors, (129), 126 states have call predecessors, (129), 129 states have call successors, (129) [2022-03-19 10:23:52,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 692 transitions. [2022-03-19 10:23:52,753 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 692 transitions. Word has length 116 [2022-03-19 10:23:52,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:52,753 INFO L478 AbstractCegarLoop]: Abstraction has 553 states and 692 transitions. [2022-03-19 10:23:52,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 6 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 4 states have call predecessors, (17), 5 states have call successors, (17) [2022-03-19 10:23:52,753 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 692 transitions. [2022-03-19 10:23:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-19 10:23:52,754 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:52,754 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:52,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:52,967 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 [2022-03-19 10:23:52,967 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:52,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 3 times [2022-03-19 10:23:52,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:52,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1151620960] [2022-03-19 10:23:52,968 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:52,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1978671899, now seen corresponding path program 4 times [2022-03-19 10:23:52,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:52,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848937505] [2022-03-19 10:23:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:52,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:52,973 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:52,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532968944] [2022-03-19 10:23:52,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:23:52,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:52,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:52,975 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) [2022-03-19 10:23:52,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-19 10:23:53,023 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:23:53,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-19 10:23:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:23:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 57 proven. 43 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 10:23:53,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:23:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 78 proven. 7 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2022-03-19 10:23:53,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:23:53,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848937505] [2022-03-19 10:23:53,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:23:53,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532968944] [2022-03-19 10:23:53,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532968944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:23:53,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:23:53,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-03-19 10:23:53,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:23:53,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1151620960] [2022-03-19 10:23:53,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1151620960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:23:53,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:23:53,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:23:53,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766351540] [2022-03-19 10:23:53,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:23:53,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:23:53,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:53,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:23:53,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-19 10:23:53,484 INFO L87 Difference]: Start difference. First operand 553 states and 692 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 10:23:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:23:53,730 INFO L93 Difference]: Finished difference Result 606 states and 774 transitions. [2022-03-19 10:23:53,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 10:23:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 118 [2022-03-19 10:23:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:23:53,733 INFO L225 Difference]: With dead ends: 606 [2022-03-19 10:23:53,733 INFO L226 Difference]: Without dead ends: 603 [2022-03-19 10:23:53,734 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:23:53,734 INFO L912 BasicCegarLoop]: 56 mSDtfsCounter, 34 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 10:23:53,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 381 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 10:23:53,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-19 10:23:53,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 596. [2022-03-19 10:23:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 386 states have (on average 1.2098445595854923) internal successors, (467), 393 states have internal predecessors, (467), 150 states have call successors, (150), 60 states have call predecessors, (150), 59 states have return successors, (146), 142 states have call predecessors, (146), 146 states have call successors, (146) [2022-03-19 10:23:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 763 transitions. [2022-03-19 10:23:53,791 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 763 transitions. Word has length 118 [2022-03-19 10:23:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:23:53,791 INFO L478 AbstractCegarLoop]: Abstraction has 596 states and 763 transitions. [2022-03-19 10:23:53,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 10:23:53,792 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 763 transitions. [2022-03-19 10:23:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-19 10:23:53,792 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:23:53,792 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:23:53,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-19 10:23:54,010 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 [2022-03-19 10:23:54,010 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:23:54,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:23:54,010 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 5 times [2022-03-19 10:23:54,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:23:54,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1448864029] [2022-03-19 10:23:54,011 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:23:54,011 INFO L85 PathProgramCache]: Analyzing trace with hash 992936989, now seen corresponding path program 6 times [2022-03-19 10:23:54,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:23:54,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823491600] [2022-03-19 10:23:54,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:23:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:23:54,016 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:23:54,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084561659] [2022-03-19 10:23:54,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:23:54,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:23:54,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:23:54,020 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) [2022-03-19 10:23:54,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-19 10:23:54,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:23:54,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:23:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 10:23:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:24:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-03-19 10:24:13,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:24:14,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:24:14,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823491600] [2022-03-19 10:24:14,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:24:14,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084561659] [2022-03-19 10:24:14,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084561659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:24:14,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:24:14,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-19 10:24:14,806 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:24:14,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1448864029] [2022-03-19 10:24:14,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1448864029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:24:14,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:24:14,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:24:14,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792829441] [2022-03-19 10:24:14,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:24:14,807 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:24:14,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:24:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:24:14,808 INFO L87 Difference]: Start difference. First operand 596 states and 763 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 10:24:17,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:24:17,609 INFO L93 Difference]: Finished difference Result 619 states and 791 transitions. [2022-03-19 10:24:17,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:24:17,610 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 124 [2022-03-19 10:24:17,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:24:17,612 INFO L225 Difference]: With dead ends: 619 [2022-03-19 10:24:17,612 INFO L226 Difference]: Without dead ends: 615 [2022-03-19 10:24:17,613 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-03-19 10:24:17,613 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 50 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-19 10:24:17,613 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 433 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-19 10:24:17,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-03-19 10:24:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 609. [2022-03-19 10:24:17,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 609 states, 394 states have (on average 1.2081218274111676) internal successors, (476), 400 states have internal predecessors, (476), 154 states have call successors, (154), 62 states have call predecessors, (154), 60 states have return successors, (150), 146 states have call predecessors, (150), 150 states have call successors, (150) [2022-03-19 10:24:17,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 609 states to 609 states and 780 transitions. [2022-03-19 10:24:17,674 INFO L78 Accepts]: Start accepts. Automaton has 609 states and 780 transitions. Word has length 124 [2022-03-19 10:24:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:24:17,674 INFO L478 AbstractCegarLoop]: Abstraction has 609 states and 780 transitions. [2022-03-19 10:24:17,674 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 10:24:17,674 INFO L276 IsEmpty]: Start isEmpty. Operand 609 states and 780 transitions. [2022-03-19 10:24:17,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-19 10:24:17,675 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:24:17,675 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:24:17,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-19 10:24:17,880 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 [2022-03-19 10:24:17,880 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:24:17,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:24:17,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 7 times [2022-03-19 10:24:17,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:17,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1023164112] [2022-03-19 10:24:17,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:24:17,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1110867224, now seen corresponding path program 8 times [2022-03-19 10:24:17,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:24:17,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137080353] [2022-03-19 10:24:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:24:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:24:17,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:24:17,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237551742] [2022-03-19 10:24:17,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:24:17,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:24:17,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:24:17,888 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) [2022-03-19 10:24:17,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-19 10:24:17,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:24:17,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:24:17,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 10:24:17,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:24:18,467 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:24:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 93 proven. 101 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-19 10:24:18,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:24:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 125 proven. 32 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2022-03-19 10:24:19,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:24:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137080353] [2022-03-19 10:24:19,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:24:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237551742] [2022-03-19 10:24:19,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237551742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:24:19,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:24:19,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-03-19 10:24:19,018 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:24:19,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1023164112] [2022-03-19 10:24:19,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1023164112] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:24:19,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:24:19,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 10:24:19,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765314862] [2022-03-19 10:24:19,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:24:19,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 10:24:19,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 10:24:19,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-03-19 10:24:19,020 INFO L87 Difference]: Start difference. First operand 609 states and 780 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 10:24:19,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:24:19,573 INFO L93 Difference]: Finished difference Result 638 states and 824 transitions. [2022-03-19 10:24:19,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 10:24:19,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 123 [2022-03-19 10:24:19,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:24:19,576 INFO L225 Difference]: With dead ends: 638 [2022-03-19 10:24:19,576 INFO L226 Difference]: Without dead ends: 636 [2022-03-19 10:24:19,577 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:24:19,577 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 38 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:24:19,577 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 584 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:24:19,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-19 10:24:19,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 632. [2022-03-19 10:24:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 404 states have (on average 1.2128712871287128) internal successors, (490), 410 states have internal predecessors, (490), 166 states have call successors, (166), 63 states have call predecessors, (166), 61 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-03-19 10:24:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 818 transitions. [2022-03-19 10:24:19,642 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 818 transitions. Word has length 123 [2022-03-19 10:24:19,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:24:19,642 INFO L478 AbstractCegarLoop]: Abstraction has 632 states and 818 transitions. [2022-03-19 10:24:19,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-03-19 10:24:19,642 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 818 transitions. [2022-03-19 10:24:19,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-19 10:24:19,643 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:24:19,643 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:24:19,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-19 10:24:19,861 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 [2022-03-19 10:24:19,861 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:24:19,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:24:19,861 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 9 times [2022-03-19 10:24:19,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:19,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [642769727] [2022-03-19 10:24:19,862 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:24:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -270396677, now seen corresponding path program 10 times [2022-03-19 10:24:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:24:19,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136315453] [2022-03-19 10:24:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:24:19,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:24:19,867 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:24:19,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546053646] [2022-03-19 10:24:19,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:24:19,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:24:19,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:24:19,870 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) [2022-03-19 10:24:19,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-19 10:24:19,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:24:19,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:24:19,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 10:24:19,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:24:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 69 proven. 118 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-03-19 10:24:20,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:24:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 523 backedges. 77 proven. 108 refuted. 2 times theorem prover too weak. 336 trivial. 0 not checked. [2022-03-19 10:24:27,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:24:27,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136315453] [2022-03-19 10:24:27,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:24:27,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546053646] [2022-03-19 10:24:27,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546053646] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:24:27,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:24:27,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2022-03-19 10:24:27,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:24:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [642769727] [2022-03-19 10:24:27,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [642769727] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:24:27,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:24:27,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-19 10:24:27,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826071465] [2022-03-19 10:24:27,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:24:27,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-19 10:24:27,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-19 10:24:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=386, Unknown=2, NotChecked=0, Total=506 [2022-03-19 10:24:27,355 INFO L87 Difference]: Start difference. First operand 632 states and 818 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 10:24:28,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:24:28,014 INFO L93 Difference]: Finished difference Result 642 states and 827 transitions. [2022-03-19 10:24:28,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 10:24:28,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 128 [2022-03-19 10:24:28,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:24:28,017 INFO L225 Difference]: With dead ends: 642 [2022-03-19 10:24:28,017 INFO L226 Difference]: Without dead ends: 640 [2022-03-19 10:24:28,017 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=157, Invalid=543, Unknown=2, NotChecked=0, Total=702 [2022-03-19 10:24:28,018 INFO L912 BasicCegarLoop]: 58 mSDtfsCounter, 37 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:24:28,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 531 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 10:24:28,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-03-19 10:24:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 636. [2022-03-19 10:24:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 407 states have (on average 1.2113022113022114) internal successors, (493), 413 states have internal predecessors, (493), 166 states have call successors, (166), 64 states have call predecessors, (166), 62 states have return successors, (162), 158 states have call predecessors, (162), 162 states have call successors, (162) [2022-03-19 10:24:28,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 821 transitions. [2022-03-19 10:24:28,083 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 821 transitions. Word has length 128 [2022-03-19 10:24:28,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:24:28,083 INFO L478 AbstractCegarLoop]: Abstraction has 636 states and 821 transitions. [2022-03-19 10:24:28,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 10:24:28,083 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 821 transitions. [2022-03-19 10:24:28,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-19 10:24:28,084 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:24:28,084 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:24:28,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-19 10:24:28,299 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 [2022-03-19 10:24:28,299 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:24:28,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:24:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 7 times [2022-03-19 10:24:28,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:28,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2056354585] [2022-03-19 10:24:28,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:24:28,300 INFO L85 PathProgramCache]: Analyzing trace with hash -677811269, now seen corresponding path program 8 times [2022-03-19 10:24:28,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:24:28,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112171773] [2022-03-19 10:24:28,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:24:28,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:24:28,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:24:28,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734413430] [2022-03-19 10:24:28,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:24:28,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:24:28,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:24:28,310 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) [2022-03-19 10:24:28,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-19 10:24:28,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:24:28,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:24:28,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-19 10:24:28,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:24:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 137 proven. 57 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-03-19 10:24:29,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:24:29,674 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:24:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 152 proven. 12 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-03-19 10:24:29,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:24:29,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112171773] [2022-03-19 10:24:29,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:24:29,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734413430] [2022-03-19 10:24:29,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734413430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:24:29,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:24:29,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-03-19 10:24:29,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:24:29,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2056354585] [2022-03-19 10:24:29,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2056354585] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:24:29,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:24:29,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:24:29,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302680181] [2022-03-19 10:24:29,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:24:29,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:24:29,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:29,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:24:29,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:24:29,844 INFO L87 Difference]: Start difference. First operand 636 states and 821 transitions. Second operand has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 10:24:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:24:31,115 INFO L93 Difference]: Finished difference Result 669 states and 868 transitions. [2022-03-19 10:24:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 10:24:31,115 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) Word has length 130 [2022-03-19 10:24:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:24:31,118 INFO L225 Difference]: With dead ends: 669 [2022-03-19 10:24:31,118 INFO L226 Difference]: Without dead ends: 664 [2022-03-19 10:24:31,119 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-19 10:24:31,119 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 36 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 710 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:24:31,119 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 710 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-19 10:24:31,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-19 10:24:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 644. [2022-03-19 10:24:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 411 states have (on average 1.2092457420924574) internal successors, (497), 417 states have internal predecessors, (497), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-19 10:24:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 832 transitions. [2022-03-19 10:24:31,193 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 832 transitions. Word has length 130 [2022-03-19 10:24:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:24:31,194 INFO L478 AbstractCegarLoop]: Abstraction has 644 states and 832 transitions. [2022-03-19 10:24:31,194 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 10 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 9 states have call successors, (21) [2022-03-19 10:24:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 832 transitions. [2022-03-19 10:24:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-19 10:24:31,195 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:24:31,195 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:24:31,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-19 10:24:31,411 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 [2022-03-19 10:24:31,412 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:24:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:24:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 7 times [2022-03-19 10:24:31,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:31,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863195520] [2022-03-19 10:24:31,412 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:24:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2098906485, now seen corresponding path program 8 times [2022-03-19 10:24:31,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:24:31,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330005273] [2022-03-19 10:24:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:24:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:24:31,419 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:24:31,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [266404443] [2022-03-19 10:24:31,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:24:31,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:24:31,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:24:31,421 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) [2022-03-19 10:24:31,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-19 10:24:31,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:24:31,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:24:31,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 10:24:31,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:24:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 10:24:31,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:24:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-19 10:24:31,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:24:31,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330005273] [2022-03-19 10:24:31,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:24:31,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266404443] [2022-03-19 10:24:31,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266404443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:24:31,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:24:31,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-19 10:24:31,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:24:31,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863195520] [2022-03-19 10:24:31,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863195520] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:24:31,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:24:31,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-19 10:24:31,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740263993] [2022-03-19 10:24:31,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:24:31,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-19 10:24:31,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:31,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-19 10:24:31,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-19 10:24:31,947 INFO L87 Difference]: Start difference. First operand 644 states and 832 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:24:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:24:32,153 INFO L93 Difference]: Finished difference Result 662 states and 853 transitions. [2022-03-19 10:24:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 10:24:32,154 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 133 [2022-03-19 10:24:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:24:32,156 INFO L225 Difference]: With dead ends: 662 [2022-03-19 10:24:32,157 INFO L226 Difference]: Without dead ends: 653 [2022-03-19 10:24:32,157 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=206, Invalid=300, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:24:32,157 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 70 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:24:32,158 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 189 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:24:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-19 10:24:32,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 653. [2022-03-19 10:24:32,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 420 states have (on average 1.2047619047619047) internal successors, (506), 426 states have internal predecessors, (506), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-19 10:24:32,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 841 transitions. [2022-03-19 10:24:32,227 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 841 transitions. Word has length 133 [2022-03-19 10:24:32,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:24:32,227 INFO L478 AbstractCegarLoop]: Abstraction has 653 states and 841 transitions. [2022-03-19 10:24:32,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:24:32,228 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 841 transitions. [2022-03-19 10:24:32,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-19 10:24:32,229 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:24:32,229 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:24:32,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-19 10:24:32,446 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 [2022-03-19 10:24:32,446 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:24:32,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:24:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 9 times [2022-03-19 10:24:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:32,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1722534304] [2022-03-19 10:24:32,447 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:24:32,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1894865945, now seen corresponding path program 10 times [2022-03-19 10:24:32,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:24:32,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787125596] [2022-03-19 10:24:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:24:32,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:24:32,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:24:32,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922642567] [2022-03-19 10:24:32,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:24:32,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:24:32,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:24:32,454 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) [2022-03-19 10:24:32,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-19 10:24:32,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:24:32,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:24:32,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-19 10:24:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:24:33,205 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:24:33,207 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:24:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 133 proven. 95 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2022-03-19 10:24:33,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:24:33,859 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:24:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 156 proven. 12 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-19 10:24:34,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:24:34,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787125596] [2022-03-19 10:24:34,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:24:34,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922642567] [2022-03-19 10:24:34,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922642567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:24:34,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:24:34,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 24 [2022-03-19 10:24:34,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:24:34,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1722534304] [2022-03-19 10:24:34,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1722534304] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:24:34,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:24:34,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:24:34,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551416863] [2022-03-19 10:24:34,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:24:34,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:24:34,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:34,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:24:34,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:24:34,033 INFO L87 Difference]: Start difference. First operand 653 states and 841 transitions. Second operand has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-03-19 10:24:34,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:24:34,560 INFO L93 Difference]: Finished difference Result 665 states and 855 transitions. [2022-03-19 10:24:34,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:24:34,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) Word has length 134 [2022-03-19 10:24:34,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:24:34,563 INFO L225 Difference]: With dead ends: 665 [2022-03-19 10:24:34,563 INFO L226 Difference]: Without dead ends: 658 [2022-03-19 10:24:34,564 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 242 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-03-19 10:24:34,564 INFO L912 BasicCegarLoop]: 60 mSDtfsCounter, 43 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:24:34,564 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 650 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 478 Invalid, 0 Unknown, 141 Unchecked, 0.4s Time] [2022-03-19 10:24:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-19 10:24:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 654. [2022-03-19 10:24:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 421 states have (on average 1.2042755344418052) internal successors, (507), 427 states have internal predecessors, (507), 169 states have call successors, (169), 64 states have call predecessors, (169), 63 states have return successors, (166), 162 states have call predecessors, (166), 166 states have call successors, (166) [2022-03-19 10:24:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 842 transitions. [2022-03-19 10:24:34,634 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 842 transitions. Word has length 134 [2022-03-19 10:24:34,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:24:34,634 INFO L478 AbstractCegarLoop]: Abstraction has 654 states and 842 transitions. [2022-03-19 10:24:34,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 11 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 9 states have call predecessors, (21), 10 states have call successors, (21) [2022-03-19 10:24:34,634 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 842 transitions. [2022-03-19 10:24:34,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-19 10:24:34,635 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:24:34,635 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:24:34,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-19 10:24:34,848 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 [2022-03-19 10:24:34,848 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:24:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:24:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 7 times [2022-03-19 10:24:34,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:34,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [839455815] [2022-03-19 10:24:34,849 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:24:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash -736314780, now seen corresponding path program 8 times [2022-03-19 10:24:34,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:24:34,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429991489] [2022-03-19 10:24:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:24:34,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:24:34,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:24:34,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [633561587] [2022-03-19 10:24:34,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:24:34,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:24:34,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:24:34,856 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) [2022-03-19 10:24:34,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-19 10:24:34,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:24:34,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:24:34,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:24:34,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:24:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 444 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-19 10:24:35,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:24:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 604 backedges. 40 proven. 60 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-03-19 10:24:35,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:24:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429991489] [2022-03-19 10:24:35,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:24:35,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633561587] [2022-03-19 10:24:35,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633561587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:24:35,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:24:35,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 10:24:35,373 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:24:35,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [839455815] [2022-03-19 10:24:35,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [839455815] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:24:35,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:24:35,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:24:35,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977968683] [2022-03-19 10:24:35,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:24:35,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:24:35,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:35,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:24:35,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:24:35,374 INFO L87 Difference]: Start difference. First operand 654 states and 842 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:24:35,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:24:35,626 INFO L93 Difference]: Finished difference Result 968 states and 1272 transitions. [2022-03-19 10:24:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:24:35,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) Word has length 139 [2022-03-19 10:24:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:24:35,629 INFO L225 Difference]: With dead ends: 968 [2022-03-19 10:24:35,630 INFO L226 Difference]: Without dead ends: 771 [2022-03-19 10:24:35,631 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=266, Invalid=384, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:24:35,631 INFO L912 BasicCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:24:35,631 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 239 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:24:35,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-03-19 10:24:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 761. [2022-03-19 10:24:35,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 494 states have (on average 1.180161943319838) internal successors, (583), 500 states have internal predecessors, (583), 186 states have call successors, (186), 82 states have call predecessors, (186), 80 states have return successors, (182), 178 states have call predecessors, (182), 182 states have call successors, (182) [2022-03-19 10:24:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 951 transitions. [2022-03-19 10:24:35,721 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 951 transitions. Word has length 139 [2022-03-19 10:24:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:24:35,722 INFO L478 AbstractCegarLoop]: Abstraction has 761 states and 951 transitions. [2022-03-19 10:24:35,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 7 states have call successors, (23), 7 states have call predecessors, (23), 5 states have return successors, (21), 5 states have call predecessors, (21), 6 states have call successors, (21) [2022-03-19 10:24:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 951 transitions. [2022-03-19 10:24:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-19 10:24:35,723 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:24:35,723 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:24:35,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-19 10:24:35,939 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 [2022-03-19 10:24:35,940 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:24:35,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:24:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -915674665, now seen corresponding path program 11 times [2022-03-19 10:24:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:35,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [320288681] [2022-03-19 10:24:35,941 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:24:35,941 INFO L85 PathProgramCache]: Analyzing trace with hash -915674665, now seen corresponding path program 12 times [2022-03-19 10:24:35,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:24:35,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337789118] [2022-03-19 10:24:35,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:24:35,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:24:35,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:24:35,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706264560] [2022-03-19 10:24:35,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:24:35,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:24:35,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:24:35,947 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:24:35,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-19 10:24:36,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:24:36,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:24:36,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-19 10:24:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:24:43,632 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 101 proven. 93 refuted. 0 times theorem prover too weak. 476 trivial. 0 not checked. [2022-03-19 10:24:43,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:24:58,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:24:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337789118] [2022-03-19 10:24:58,106 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:24:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706264560] [2022-03-19 10:24:58,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706264560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:24:58,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:24:58,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-03-19 10:24:58,106 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:24:58,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [320288681] [2022-03-19 10:24:58,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [320288681] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:24:58,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:24:58,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:24:58,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677594532] [2022-03-19 10:24:58,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:24:58,107 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:24:58,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:24:58,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:24:58,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=683, Unknown=2, NotChecked=0, Total=812 [2022-03-19 10:24:58,108 INFO L87 Difference]: Start difference. First operand 761 states and 951 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 10:25:10,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:25:10,772 INFO L93 Difference]: Finished difference Result 815 states and 1023 transitions. [2022-03-19 10:25:10,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-19 10:25:10,773 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) Word has length 141 [2022-03-19 10:25:10,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:25:10,776 INFO L225 Difference]: With dead ends: 815 [2022-03-19 10:25:10,776 INFO L226 Difference]: Without dead ends: 810 [2022-03-19 10:25:10,777 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 179 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=188, Invalid=1000, Unknown=2, NotChecked=0, Total=1190 [2022-03-19 10:25:10,777 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 61 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-19 10:25:10,777 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 734 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 685 Invalid, 0 Unknown, 10 Unchecked, 5.4s Time] [2022-03-19 10:25:10,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2022-03-19 10:25:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 794. [2022-03-19 10:25:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 513 states have (on average 1.1851851851851851) internal successors, (608), 519 states have internal predecessors, (608), 198 states have call successors, (198), 84 states have call predecessors, (198), 82 states have return successors, (194), 190 states have call predecessors, (194), 194 states have call successors, (194) [2022-03-19 10:25:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1000 transitions. [2022-03-19 10:25:10,867 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1000 transitions. Word has length 141 [2022-03-19 10:25:10,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:25:10,868 INFO L478 AbstractCegarLoop]: Abstraction has 794 states and 1000 transitions. [2022-03-19 10:25:10,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 7 states have call successors, (18) [2022-03-19 10:25:10,868 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1000 transitions. [2022-03-19 10:25:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 10:25:10,869 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:25:10,869 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:25:10,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-19 10:25:11,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-19 10:25:11,075 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:25:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:25:11,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 13 times [2022-03-19 10:25:11,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:11,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1509084458] [2022-03-19 10:25:11,076 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:25:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2139656620, now seen corresponding path program 14 times [2022-03-19 10:25:11,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:25:11,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709659333] [2022-03-19 10:25:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:25:11,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:25:11,081 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:25:11,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052621589] [2022-03-19 10:25:11,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:25:11,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:25:11,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:25:11,083 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:25:11,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-19 10:25:11,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:25:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:25:11,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-19 10:25:11,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:25:12,137 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:25:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 112 proven. 92 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2022-03-19 10:25:12,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:25:13,833 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 157 proven. 37 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2022-03-19 10:25:13,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:25:13,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709659333] [2022-03-19 10:25:13,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:25:13,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052621589] [2022-03-19 10:25:13,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052621589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:25:13,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:25:13,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-03-19 10:25:13,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:25:13,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1509084458] [2022-03-19 10:25:13,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1509084458] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:25:13,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:25:13,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:25:13,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951383242] [2022-03-19 10:25:13,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:25:13,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:25:13,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:13,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:25:13,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-19 10:25:13,835 INFO L87 Difference]: Start difference. First operand 794 states and 1000 transitions. Second operand has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 10:25:15,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:25:15,603 INFO L93 Difference]: Finished difference Result 837 states and 1055 transitions. [2022-03-19 10:25:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:25:15,604 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 146 [2022-03-19 10:25:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:25:15,607 INFO L225 Difference]: With dead ends: 837 [2022-03-19 10:25:15,607 INFO L226 Difference]: Without dead ends: 835 [2022-03-19 10:25:15,608 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-19 10:25:15,608 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 42 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:25:15,608 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 762 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-19 10:25:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-03-19 10:25:15,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 829. [2022-03-19 10:25:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 532 states have (on average 1.1860902255639099) internal successors, (631), 538 states have internal predecessors, (631), 210 states have call successors, (210), 88 states have call predecessors, (210), 86 states have return successors, (206), 202 states have call predecessors, (206), 206 states have call successors, (206) [2022-03-19 10:25:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1047 transitions. [2022-03-19 10:25:15,716 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1047 transitions. Word has length 146 [2022-03-19 10:25:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:25:15,716 INFO L478 AbstractCegarLoop]: Abstraction has 829 states and 1047 transitions. [2022-03-19 10:25:15,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5625) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2022-03-19 10:25:15,717 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1047 transitions. [2022-03-19 10:25:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-19 10:25:15,718 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:25:15,718 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:25:15,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-19 10:25:15,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-19 10:25:15,931 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:25:15,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:25:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1180190888, now seen corresponding path program 15 times [2022-03-19 10:25:15,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:15,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [256624811] [2022-03-19 10:25:15,932 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:25:15,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1180190888, now seen corresponding path program 16 times [2022-03-19 10:25:15,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:25:15,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491918018] [2022-03-19 10:25:15,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:25:15,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:25:15,937 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:25:15,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1783719843] [2022-03-19 10:25:15,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:25:15,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:25:15,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:25:15,942 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:25:15,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-19 10:25:16,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:25:16,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:25:16,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-19 10:25:16,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:25:16,715 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:25:16,717 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:25:17,091 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:25:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 175 proven. 128 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2022-03-19 10:25:17,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:25:17,783 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:25:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 187 proven. 23 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2022-03-19 10:25:17,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:25:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491918018] [2022-03-19 10:25:17,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:25:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783719843] [2022-03-19 10:25:17,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783719843] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:25:17,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:25:17,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10] total 23 [2022-03-19 10:25:17,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:25:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [256624811] [2022-03-19 10:25:17,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [256624811] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:25:17,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:25:17,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-19 10:25:17,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861046901] [2022-03-19 10:25:17,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:25:17,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-19 10:25:17,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-19 10:25:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-19 10:25:17,955 INFO L87 Difference]: Start difference. First operand 829 states and 1047 transitions. Second operand has 18 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 12 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-03-19 10:25:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:25:18,731 INFO L93 Difference]: Finished difference Result 858 states and 1091 transitions. [2022-03-19 10:25:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:25:18,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 12 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) Word has length 146 [2022-03-19 10:25:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:25:18,735 INFO L225 Difference]: With dead ends: 858 [2022-03-19 10:25:18,735 INFO L226 Difference]: Without dead ends: 856 [2022-03-19 10:25:18,736 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 268 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:25:18,736 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 48 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 10:25:18,736 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 771 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 759 Invalid, 0 Unknown, 27 Unchecked, 0.5s Time] [2022-03-19 10:25:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-03-19 10:25:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 852. [2022-03-19 10:25:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 542 states have (on average 1.1900369003690037) internal successors, (645), 548 states have internal predecessors, (645), 222 states have call successors, (222), 89 states have call predecessors, (222), 87 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2022-03-19 10:25:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1085 transitions. [2022-03-19 10:25:18,850 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1085 transitions. Word has length 146 [2022-03-19 10:25:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:25:18,850 INFO L478 AbstractCegarLoop]: Abstraction has 852 states and 1085 transitions. [2022-03-19 10:25:18,850 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 12 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 11 states have call predecessors, (23), 11 states have call successors, (23) [2022-03-19 10:25:18,850 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1085 transitions. [2022-03-19 10:25:18,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 10:25:18,851 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:25:18,851 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:25:18,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-19 10:25:19,061 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-19 10:25:19,062 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:25:19,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:25:19,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 17 times [2022-03-19 10:25:19,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:19,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045243692] [2022-03-19 10:25:19,062 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:25:19,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1613652297, now seen corresponding path program 18 times [2022-03-19 10:25:19,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:25:19,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212148185] [2022-03-19 10:25:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:25:19,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:25:19,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:25:19,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1405119124] [2022-03-19 10:25:19,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:25:19,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:25:19,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:25:19,070 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:25:19,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-19 10:25:19,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 10:25:19,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:25:19,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-19 10:25:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:25:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 91 proven. 79 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-03-19 10:25:22,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:25:23,284 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:25:26,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:25:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212148185] [2022-03-19 10:25:26,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:25:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405119124] [2022-03-19 10:25:26,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405119124] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:25:26,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:25:26,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-19 10:25:26,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:25:26,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045243692] [2022-03-19 10:25:26,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045243692] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:25:26,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:25:26,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-19 10:25:26,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643705042] [2022-03-19 10:25:26,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:25:26,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-19 10:25:26,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:26,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-19 10:25:26,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:25:26,639 INFO L87 Difference]: Start difference. First operand 852 states and 1085 transitions. Second operand has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2022-03-19 10:25:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:25:30,062 INFO L93 Difference]: Finished difference Result 950 states and 1237 transitions. [2022-03-19 10:25:30,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:25:30,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) Word has length 151 [2022-03-19 10:25:30,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:25:30,066 INFO L225 Difference]: With dead ends: 950 [2022-03-19 10:25:30,066 INFO L226 Difference]: Without dead ends: 948 [2022-03-19 10:25:30,067 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-03-19 10:25:30,068 INFO L912 BasicCegarLoop]: 68 mSDtfsCounter, 79 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-19 10:25:30,068 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 653 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-19 10:25:30,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 948 states. [2022-03-19 10:25:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 948 to 924. [2022-03-19 10:25:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 583 states have (on average 1.2075471698113207) internal successors, (704), 590 states have internal predecessors, (704), 251 states have call successors, (251), 91 states have call predecessors, (251), 89 states have return successors, (247), 242 states have call predecessors, (247), 247 states have call successors, (247) [2022-03-19 10:25:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1202 transitions. [2022-03-19 10:25:30,201 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1202 transitions. Word has length 151 [2022-03-19 10:25:30,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:25:30,202 INFO L478 AbstractCegarLoop]: Abstraction has 924 states and 1202 transitions. [2022-03-19 10:25:30,202 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.625) internal successors, (42), 14 states have internal predecessors, (42), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 7 states have call predecessors, (20), 6 states have call successors, (20) [2022-03-19 10:25:30,202 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1202 transitions. [2022-03-19 10:25:30,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-19 10:25:30,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:25:30,203 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:25:30,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-19 10:25:30,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:25:30,409 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:25:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:25:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 19 times [2022-03-19 10:25:30,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:30,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [582782476] [2022-03-19 10:25:30,410 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:25:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash 40428859, now seen corresponding path program 20 times [2022-03-19 10:25:30,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:25:30,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379712486] [2022-03-19 10:25:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:25:30,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:25:30,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:25:30,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1277391188] [2022-03-19 10:25:30,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:25:30,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:25:30,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:25:30,417 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:25:30,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-19 10:25:30,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:25:30,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:25:30,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-19 10:25:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:25:33,877 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:25:34,532 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 170 proven. 97 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-03-19 10:25:34,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:25:34,702 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:25:34,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:25:34,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379712486] [2022-03-19 10:25:34,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:25:34,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277391188] [2022-03-19 10:25:34,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277391188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 10:25:34,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 10:25:34,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-19 10:25:34,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:25:34,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [582782476] [2022-03-19 10:25:34,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [582782476] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:25:34,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:25:34,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-19 10:25:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992524305] [2022-03-19 10:25:34,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:25:34,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-19 10:25:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:34,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-19 10:25:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-03-19 10:25:34,798 INFO L87 Difference]: Start difference. First operand 924 states and 1202 transitions. Second operand has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-19 10:25:37,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:25:37,417 INFO L93 Difference]: Finished difference Result 938 states and 1214 transitions. [2022-03-19 10:25:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-19 10:25:37,418 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) Word has length 151 [2022-03-19 10:25:37,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:25:37,422 INFO L225 Difference]: With dead ends: 938 [2022-03-19 10:25:37,422 INFO L226 Difference]: Without dead ends: 936 [2022-03-19 10:25:37,422 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-03-19 10:25:37,423 INFO L912 BasicCegarLoop]: 63 mSDtfsCounter, 75 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:25:37,423 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 652 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-19 10:25:37,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-19 10:25:37,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 932. [2022-03-19 10:25:37,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 589 states have (on average 1.2054329371816639) internal successors, (710), 596 states have internal predecessors, (710), 251 states have call successors, (251), 93 states have call predecessors, (251), 91 states have return successors, (247), 242 states have call predecessors, (247), 247 states have call successors, (247) [2022-03-19 10:25:37,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1208 transitions. [2022-03-19 10:25:37,554 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1208 transitions. Word has length 151 [2022-03-19 10:25:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:25:37,555 INFO L478 AbstractCegarLoop]: Abstraction has 932 states and 1208 transitions. [2022-03-19 10:25:37,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 16 states have internal predecessors, (44), 9 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 10 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-19 10:25:37,555 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1208 transitions. [2022-03-19 10:25:37,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-19 10:25:37,556 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:25:37,556 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:25:37,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-19 10:25:37,764 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:25:37,764 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:25:37,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:25:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 11 times [2022-03-19 10:25:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:25:37,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585769124] [2022-03-19 10:25:37,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:25:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1238694007, now seen corresponding path program 12 times [2022-03-19 10:25:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:25:37,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064150585] [2022-03-19 10:25:37,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:25:37,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:25:37,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:25:37,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238903051] [2022-03-19 10:25:37,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 10:25:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:25:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:25:37,772 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:25:37,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-19 10:25:37,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 10:25:37,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:25:37,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-19 10:25:37,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:25:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 89 proven. 111 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2022-03-19 10:25:38,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:25:39,276 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:26:05,898 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:27:43,951 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_406 Int) (v_main_~k~0_BEFORE_CALL_207 Int)) (or (<= v_main_~b~0_BEFORE_CALL_406 0) (= (mod (* v_main_~k~0_BEFORE_CALL_207 v_main_~b~0_BEFORE_CALL_406) v_main_~b~0_BEFORE_CALL_406) 0))))) is different from true [2022-03-19 10:28:03,994 WARN L855 $PredicateComparison]: unable to prove that (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_406 Int) (v_main_~k~0_BEFORE_CALL_207 Int)) (or (<= v_main_~b~0_BEFORE_CALL_406 0) (= (mod (* v_main_~k~0_BEFORE_CALL_207 v_main_~b~0_BEFORE_CALL_406) v_main_~b~0_BEFORE_CALL_406) 0))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-03-19 10:28:14,015 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~b~0_BEFORE_CALL_406 Int) (v_main_~k~0_BEFORE_CALL_207 Int)) (or (<= v_main_~b~0_BEFORE_CALL_406 0) (= (mod (* v_main_~k~0_BEFORE_CALL_207 v_main_~b~0_BEFORE_CALL_406) v_main_~b~0_BEFORE_CALL_406) 0)))) is different from true [2022-03-19 10:28:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 128 proven. 68 refuted. 12 times theorem prover too weak. 684 trivial. 5 not checked. [2022-03-19 10:28:15,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064150585] [2022-03-19 10:28:15,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:15,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238903051] [2022-03-19 10:28:15,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238903051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:28:15,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:28:15,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2022-03-19 10:28:15,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:15,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585769124] [2022-03-19 10:28:15,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585769124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:15,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:15,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-19 10:28:15,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270879762] [2022-03-19 10:28:15,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:15,212 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-19 10:28:15,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:15,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-19 10:28:15,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=507, Unknown=3, NotChecked=144, Total=756 [2022-03-19 10:28:15,213 INFO L87 Difference]: Start difference. First operand 932 states and 1208 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:28:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:16,545 INFO L93 Difference]: Finished difference Result 960 states and 1231 transitions. [2022-03-19 10:28:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-19 10:28:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 153 [2022-03-19 10:28:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:16,548 INFO L225 Difference]: With dead ends: 960 [2022-03-19 10:28:16,549 INFO L226 Difference]: Without dead ends: 954 [2022-03-19 10:28:16,549 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 278 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=159, Invalid=780, Unknown=3, NotChecked=180, Total=1122 [2022-03-19 10:28:16,549 INFO L912 BasicCegarLoop]: 48 mSDtfsCounter, 53 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:16,549 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 397 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-19 10:28:16,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-03-19 10:28:16,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 933. [2022-03-19 10:28:16,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 595 states have (on average 1.1949579831932773) internal successors, (711), 602 states have internal predecessors, (711), 242 states have call successors, (242), 96 states have call predecessors, (242), 95 states have return successors, (239), 234 states have call predecessors, (239), 239 states have call successors, (239) [2022-03-19 10:28:16,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1192 transitions. [2022-03-19 10:28:16,685 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1192 transitions. Word has length 153 [2022-03-19 10:28:16,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:16,686 INFO L478 AbstractCegarLoop]: Abstraction has 933 states and 1192 transitions. [2022-03-19 10:28:16,686 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-03-19 10:28:16,686 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1192 transitions. [2022-03-19 10:28:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-19 10:28:16,687 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:28:16,687 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:28:16,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-19 10:28:16,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-19 10:28:16,903 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:28:16,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:28:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 9 times [2022-03-19 10:28:16,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:16,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070231850] [2022-03-19 10:28:16,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:28:16,904 INFO L85 PathProgramCache]: Analyzing trace with hash -490494897, now seen corresponding path program 10 times [2022-03-19 10:28:16,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:28:16,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590251868] [2022-03-19 10:28:16,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:28:16,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:28:16,909 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:28:16,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667283204] [2022-03-19 10:28:16,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:28:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:28:16,911 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:28:16,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-19 10:28:16,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:28:16,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:28:16,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-19 10:28:16,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 718 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 10:28:17,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:28:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 40 proven. 78 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2022-03-19 10:28:17,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:28:17,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590251868] [2022-03-19 10:28:17,478 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:28:17,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667283204] [2022-03-19 10:28:17,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667283204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:28:17,478 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:28:17,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-19 10:28:17,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:28:17,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070231850] [2022-03-19 10:28:17,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070231850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:28:17,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:28:17,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 10:28:17,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261586391] [2022-03-19 10:28:17,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:28:17,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 10:28:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:17,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 10:28:17,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-19 10:28:17,480 INFO L87 Difference]: Start difference. First operand 933 states and 1192 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:28:17,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:28:17,738 INFO L93 Difference]: Finished difference Result 954 states and 1217 transitions. [2022-03-19 10:28:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:28:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) Word has length 156 [2022-03-19 10:28:17,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:28:17,741 INFO L225 Difference]: With dead ends: 954 [2022-03-19 10:28:17,741 INFO L226 Difference]: Without dead ends: 945 [2022-03-19 10:28:17,742 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=267, Invalid=383, Unknown=0, NotChecked=0, Total=650 [2022-03-19 10:28:17,742 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 75 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 10:28:17,742 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 230 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 10:28:17,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-03-19 10:28:17,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 945. [2022-03-19 10:28:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 607 states have (on average 1.1911037891268534) internal successors, (723), 614 states have internal predecessors, (723), 242 states have call successors, (242), 96 states have call predecessors, (242), 95 states have return successors, (239), 234 states have call predecessors, (239), 239 states have call successors, (239) [2022-03-19 10:28:17,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1204 transitions. [2022-03-19 10:28:17,872 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1204 transitions. Word has length 156 [2022-03-19 10:28:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:28:17,872 INFO L478 AbstractCegarLoop]: Abstraction has 945 states and 1204 transitions. [2022-03-19 10:28:17,872 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 8 states have call successors, (27), 8 states have call predecessors, (27), 6 states have return successors, (25), 6 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-19 10:28:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1204 transitions. [2022-03-19 10:28:17,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 10:28:17,873 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:28:17,874 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:28:17,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-19 10:28:18,087 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-19 10:28:18,087 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:28:18,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:28:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 13 times [2022-03-19 10:28:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:28:18,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1441803313] [2022-03-19 10:28:18,088 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:28:18,088 INFO L85 PathProgramCache]: Analyzing trace with hash 216017621, now seen corresponding path program 14 times [2022-03-19 10:28:18,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:28:18,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629791629] [2022-03-19 10:28:18,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:28:18,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:28:18,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:28:18,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [243786273] [2022-03-19 10:28:18,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 10:28:18,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:28:18,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:28:18,095 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:28:18,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-19 10:28:18,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 10:28:18,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:28:18,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-19 10:28:18,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:28:19,730 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:28:19,733 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:28:19,735 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:28:19,744 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:28:19,747 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:28:19,752 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:28:19,756 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:28:50,268 WARN L232 SmtUtils]: Spent 13.97s on a formula simplification. DAG size of input: 136 DAG size of output: 117 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:29:55,747 WARN L232 SmtUtils]: Spent 18.34s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 10:29:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 214 proven. 158 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2022-03-19 10:29:56,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 10:30:10,575 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:30:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 251 proven. 4 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2022-03-19 10:30:10,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 10:30:10,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629791629] [2022-03-19 10:30:10,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 10:30:10,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243786273] [2022-03-19 10:30:10,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243786273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 10:30:10,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 10:30:10,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-03-19 10:30:10,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 10:30:10,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1441803313] [2022-03-19 10:30:10,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1441803313] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 10:30:10,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 10:30:10,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-19 10:30:10,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725517135] [2022-03-19 10:30:10,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 10:30:10,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-19 10:30:10,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 10:30:10,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-19 10:30:10,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=549, Unknown=2, NotChecked=0, Total=650 [2022-03-19 10:30:10,888 INFO L87 Difference]: Start difference. First operand 945 states and 1204 transitions. Second operand has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-03-19 10:30:12,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 10:30:12,200 INFO L93 Difference]: Finished difference Result 955 states and 1215 transitions. [2022-03-19 10:30:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-19 10:30:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) Word has length 157 [2022-03-19 10:30:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 10:30:12,203 INFO L225 Difference]: With dead ends: 955 [2022-03-19 10:30:12,203 INFO L226 Difference]: Without dead ends: 953 [2022-03-19 10:30:12,204 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 286 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 89.2s TimeCoverageRelationStatistics Valid=122, Invalid=688, Unknown=2, NotChecked=0, Total=812 [2022-03-19 10:30:12,204 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 37 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 10:30:12,204 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 795 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 686 Invalid, 0 Unknown, 131 Unchecked, 0.7s Time] [2022-03-19 10:30:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2022-03-19 10:30:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 951. [2022-03-19 10:30:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 611 states have (on average 1.1914893617021276) internal successors, (728), 619 states have internal predecessors, (728), 243 states have call successors, (243), 97 states have call predecessors, (243), 96 states have return successors, (240), 234 states have call predecessors, (240), 240 states have call successors, (240) [2022-03-19 10:30:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1211 transitions. [2022-03-19 10:30:12,337 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1211 transitions. Word has length 157 [2022-03-19 10:30:12,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 10:30:12,337 INFO L478 AbstractCegarLoop]: Abstraction has 951 states and 1211 transitions. [2022-03-19 10:30:12,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.625) internal successors, (42), 16 states have internal predecessors, (42), 11 states have call successors, (27), 2 states have call predecessors, (27), 2 states have return successors, (25), 9 states have call predecessors, (25), 10 states have call successors, (25) [2022-03-19 10:30:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1211 transitions. [2022-03-19 10:30:12,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-19 10:30:12,339 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 10:30:12,339 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 10:30:12,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-19 10:30:12,550 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-19 10:30:12,550 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 10:30:12,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 10:30:12,550 INFO L85 PathProgramCache]: Analyzing trace with hash 488734297, now seen corresponding path program 15 times [2022-03-19 10:30:12,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 10:30:12,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1673522731] [2022-03-19 10:30:12,551 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 10:30:12,551 INFO L85 PathProgramCache]: Analyzing trace with hash 488734297, now seen corresponding path program 16 times [2022-03-19 10:30:12,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 10:30:12,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031588410] [2022-03-19 10:30:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 10:30:12,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 10:30:12,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 10:30:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248397433] [2022-03-19 10:30:12,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 10:30:12,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 10:30:12,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 10:30:12,557 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 10:30:12,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-19 10:30:12,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 10:30:12,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 10:30:12,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-19 10:30:12,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 10:30:16,790 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 10:30:17,159 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 208 proven. 173 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2022-03-19 10:30:17,159 INFO L328 TraceCheckSpWp]: Computing backward predicates...