/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/prod4br-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-07 00:02:35,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-07 00:02:35,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-07 00:02:35,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-07 00:02:35,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-07 00:02:35,243 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-07 00:02:35,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-07 00:02:35,244 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-07 00:02:35,255 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-07 00:02:35,255 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-07 00:02:35,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-07 00:02:35,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-07 00:02:35,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-07 00:02:35,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-07 00:02:35,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-07 00:02:35,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-07 00:02:35,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-07 00:02:35,257 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-07 00:02:35,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-07 00:02:35,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-07 00:02:35,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-07 00:02:35,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-07 00:02:35,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-07 00:02:35,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:02:35,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-07 00:02:35,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-07 00:02:35,258 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-07 00:02:35,258 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-07 00:02:35,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-07 00:02:35,258 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-07 00:02:35,258 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-07 00:02:35,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-07 00:02:35,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-07 00:02:35,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-07 00:02:35,487 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-07 00:02:35,487 INFO L275 PluginConnector]: CDTParser initialized [2022-04-07 00:02:35,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound10.c [2022-04-07 00:02:35,533 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c71413a2d/3f875725579f4a2daf33f95eef038686/FLAG154f69d6b [2022-04-07 00:02:35,880 INFO L306 CDTParser]: Found 1 translation units. [2022-04-07 00:02:35,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound10.c [2022-04-07 00:02:35,886 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c71413a2d/3f875725579f4a2daf33f95eef038686/FLAG154f69d6b [2022-04-07 00:02:35,894 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c71413a2d/3f875725579f4a2daf33f95eef038686 [2022-04-07 00:02:35,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-07 00:02:35,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-07 00:02:35,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-07 00:02:35,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-07 00:02:35,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-07 00:02:35,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:02:35" (1/1) ... [2022-04-07 00:02:35,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@422bc548 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:35, skipping insertion in model container [2022-04-07 00:02:35,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.04 12:02:35" (1/1) ... [2022-04-07 00:02:35,905 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-07 00:02:35,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-07 00:02:36,027 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/prod4br-ll_valuebound10.c[524,537] [2022-04-07 00:02:36,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:02:36,062 INFO L203 MainTranslator]: Completed pre-run [2022-04-07 00:02:36,072 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/prod4br-ll_valuebound10.c[524,537] [2022-04-07 00:02:36,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-07 00:02:36,100 INFO L208 MainTranslator]: Completed translation [2022-04-07 00:02:36,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36 WrapperNode [2022-04-07 00:02:36,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-07 00:02:36,101 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-07 00:02:36,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-07 00:02:36,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-07 00:02:36,108 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (1/1) ... [2022-04-07 00:02:36,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (1/1) ... [2022-04-07 00:02:36,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (1/1) ... [2022-04-07 00:02:36,112 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (1/1) ... [2022-04-07 00:02:36,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (1/1) ... [2022-04-07 00:02:36,117 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (1/1) ... [2022-04-07 00:02:36,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (1/1) ... [2022-04-07 00:02:36,119 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-07 00:02:36,120 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-07 00:02:36,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-07 00:02:36,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-07 00:02:36,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (1/1) ... [2022-04-07 00:02:36,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-07 00:02:36,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:36,146 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) [2022-04-07 00:02:36,170 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 [2022-04-07 00:02:36,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-07 00:02:36,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-07 00:02:36,202 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-07 00:02:36,203 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-07 00:02:36,203 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-07 00:02:36,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-07 00:02:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-07 00:02:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-07 00:02:36,203 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-07 00:02:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-07 00:02:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-07 00:02:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-07 00:02:36,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-07 00:02:36,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-07 00:02:36,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-07 00:02:36,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-07 00:02:36,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-07 00:02:36,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-07 00:02:36,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-07 00:02:36,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-07 00:02:36,256 INFO L234 CfgBuilder]: Building ICFG [2022-04-07 00:02:36,257 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-07 00:02:36,419 INFO L275 CfgBuilder]: Performing block encoding [2022-04-07 00:02:36,423 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-07 00:02:36,423 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-07 00:02:36,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:02:36 BoogieIcfgContainer [2022-04-07 00:02:36,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-07 00:02:36,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-07 00:02:36,426 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-07 00:02:36,428 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-07 00:02:36,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.04 12:02:35" (1/3) ... [2022-04-07 00:02:36,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c72c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:02:36, skipping insertion in model container [2022-04-07 00:02:36,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.04 12:02:36" (2/3) ... [2022-04-07 00:02:36,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19c72c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.04 12:02:36, skipping insertion in model container [2022-04-07 00:02:36,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.04 12:02:36" (3/3) ... [2022-04-07 00:02:36,430 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound10.c [2022-04-07 00:02:36,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-07 00:02:36,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-07 00:02:36,475 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-07 00:02:36,480 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 [2022-04-07 00:02:36,480 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-07 00:02:36,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:02:36,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:02:36,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:36,501 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:02:36,501 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:36,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2022-04-07 00:02:36,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:36,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1141438630] [2022-04-07 00:02:36,526 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:36,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 2 times [2022-04-07 00:02:36,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:36,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260868882] [2022-04-07 00:02:36,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:36,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:02:36,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-07 00:02:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:02:36,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-07 00:02:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:02:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-07 00:02:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:02:36,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-07 00:02:36,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-07 00:02:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:02:36,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:36,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260868882] [2022-04-07 00:02:36,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260868882] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:36,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:36,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:02:36,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:36,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1141438630] [2022-04-07 00:02:36,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1141438630] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:36,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:36,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-07 00:02:36,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350643650] [2022-04-07 00:02:36,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:36,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-07 00:02:36,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:36,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-07 00:02:36,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:02:36,720 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:02:36,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:36,790 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2022-04-07 00:02:36,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-07 00:02:36,792 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-04-07 00:02:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:36,797 INFO L225 Difference]: With dead ends: 61 [2022-04-07 00:02:36,797 INFO L226 Difference]: Without dead ends: 29 [2022-04-07 00:02:36,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-07 00:02:36,801 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:36,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:02:36,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-07 00:02:36,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-04-07 00:02:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-04-07 00:02:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-04-07 00:02:36,841 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2022-04-07 00:02:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:36,842 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-04-07 00:02:36,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-07 00:02:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-04-07 00:02:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-07 00:02:36,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:36,843 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:02:36,844 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-07 00:02:36,844 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2022-04-07 00:02:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1062326234] [2022-04-07 00:02:36,845 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 2 times [2022-04-07 00:02:36,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585440632] [2022-04-07 00:02:36,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:36,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:36,865 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:36,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [620507641] [2022-04-07 00:02:36,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:36,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:36,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:36,879 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) [2022-04-07 00:02:36,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-07 00:02:36,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-07 00:02:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-07 00:02:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:37,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:02:37,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-07 00:02:37,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:37,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585440632] [2022-04-07 00:02:37,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:37,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620507641] [2022-04-07 00:02:37,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620507641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:37,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:37,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:02:37,087 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:37,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1062326234] [2022-04-07 00:02:37,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1062326234] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:37,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:37,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:02:37,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68766528] [2022-04-07 00:02:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:37,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:02:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:02:37,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-07 00:02:37,120 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:02:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:37,201 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-04-07 00:02:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:02:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-04-07 00:02:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:37,204 INFO L225 Difference]: With dead ends: 43 [2022-04-07 00:02:37,205 INFO L226 Difference]: Without dead ends: 41 [2022-04-07 00:02:37,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-07 00:02:37,207 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:37,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 92 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:02:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-07 00:02:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-04-07 00:02:37,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-07 00:02:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-04-07 00:02:37,234 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 28 [2022-04-07 00:02:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:37,234 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-04-07 00:02:37,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-04-07 00:02:37,235 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-04-07 00:02:37,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-07 00:02:37,236 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:37,236 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:02:37,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-07 00:02:37,451 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 [2022-04-07 00:02:37,452 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:37,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:37,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 1 times [2022-04-07 00:02:37,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:37,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1074589807] [2022-04-07 00:02:37,453 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:37,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1139707498, now seen corresponding path program 2 times [2022-04-07 00:02:37,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:37,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724577623] [2022-04-07 00:02:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:37,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:37,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [431014138] [2022-04-07 00:02:37,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:37,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:37,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:37,465 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) [2022-04-07 00:02:37,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-07 00:02:37,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:37,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:37,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-07 00:02:37,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:02:37,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:38,056 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:02:38,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:38,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724577623] [2022-04-07 00:02:38,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:38,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431014138] [2022-04-07 00:02:38,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431014138] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:02:38,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:02:38,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-04-07 00:02:38,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:38,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1074589807] [2022-04-07 00:02:38,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1074589807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:38,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:38,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-07 00:02:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391108826] [2022-04-07 00:02:38,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:38,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-07 00:02:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:38,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-07 00:02:38,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:02:38,059 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:02:40,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:02:40,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:40,935 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-04-07 00:02:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:02:40,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2022-04-07 00:02:40,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:40,937 INFO L225 Difference]: With dead ends: 47 [2022-04-07 00:02:40,937 INFO L226 Difference]: Without dead ends: 45 [2022-04-07 00:02:40,937 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:02:40,938 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 16 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:40,938 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 129 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 229 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2022-04-07 00:02:40,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-07 00:02:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-04-07 00:02:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:02:40,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-04-07 00:02:40,945 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 34 [2022-04-07 00:02:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:40,945 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-04-07 00:02:40,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 10 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:02:40,946 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-04-07 00:02:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-07 00:02:40,946 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:40,946 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-07 00:02:40,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-07 00:02:41,159 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 [2022-04-07 00:02:41,160 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:41,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:41,160 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 1 times [2022-04-07 00:02:41,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:41,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1423825895] [2022-04-07 00:02:41,160 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:41,161 INFO L85 PathProgramCache]: Analyzing trace with hash 412541489, now seen corresponding path program 2 times [2022-04-07 00:02:41,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:41,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696865789] [2022-04-07 00:02:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:41,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:41,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:41,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531877236] [2022-04-07 00:02:41,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:41,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:41,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:41,172 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) [2022-04-07 00:02:41,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-07 00:02:41,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:41,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:41,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-07 00:02:41,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:43,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:02:43,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:43,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:02:43,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696865789] [2022-04-07 00:02:43,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531877236] [2022-04-07 00:02:43,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531877236] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:02:43,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:02:43,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-07 00:02:43,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:43,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1423825895] [2022-04-07 00:02:43,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1423825895] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:43,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:43,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-07 00:02:43,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913186816] [2022-04-07 00:02:43,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:43,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-07 00:02:43,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:43,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-07 00:02:43,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:02:43,584 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:02:43,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:43,819 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2022-04-07 00:02:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-07 00:02:43,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2022-04-07 00:02:43,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:43,820 INFO L225 Difference]: With dead ends: 59 [2022-04-07 00:02:43,820 INFO L226 Difference]: Without dead ends: 57 [2022-04-07 00:02:43,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:02:43,821 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:43,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 115 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:02:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-07 00:02:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2022-04-07 00:02:43,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 33 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-07 00:02:43,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-04-07 00:02:43,839 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 36 [2022-04-07 00:02:43,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:43,840 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-04-07 00:02:43,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:02:43,840 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-04-07 00:02:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-07 00:02:43,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:43,841 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-07 00:02:43,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-07 00:02:44,058 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 [2022-04-07 00:02:44,059 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 1 times [2022-04-07 00:02:44,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:44,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [232326152] [2022-04-07 00:02:44,059 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:44,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2032180221, now seen corresponding path program 2 times [2022-04-07 00:02:44,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:44,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763560652] [2022-04-07 00:02:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:44,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:44,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:44,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186282431] [2022-04-07 00:02:44,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:44,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:44,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:44,070 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) [2022-04-07 00:02:44,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-07 00:02:44,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:44,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:44,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-07 00:02:44,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:02:44,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:02:44,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:44,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763560652] [2022-04-07 00:02:44,426 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:44,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186282431] [2022-04-07 00:02:44,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186282431] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:02:44,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:02:44,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-07 00:02:44,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:44,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [232326152] [2022-04-07 00:02:44,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [232326152] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:44,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:44,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:02:44,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420646006] [2022-04-07 00:02:44,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:44,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:02:44,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:44,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:02:44,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:02:44,428 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:02:44,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:44,826 INFO L93 Difference]: Finished difference Result 77 states and 99 transitions. [2022-04-07 00:02:44,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:02:44,827 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 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 37 [2022-04-07 00:02:44,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:44,829 INFO L225 Difference]: With dead ends: 77 [2022-04-07 00:02:44,829 INFO L226 Difference]: Without dead ends: 63 [2022-04-07 00:02:44,829 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:02:44,830 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 17 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:44,830 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 137 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-07 00:02:44,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-07 00:02:44,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-04-07 00:02:44,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-07 00:02:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-04-07 00:02:44,840 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 37 [2022-04-07 00:02:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:44,840 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-04-07 00:02:44,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:02:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-04-07 00:02:44,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-07 00:02:44,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:44,841 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:02:44,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-07 00:02:45,052 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 [2022-04-07 00:02:45,052 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:45,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:45,053 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 1 times [2022-04-07 00:02:45,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:45,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1261023052] [2022-04-07 00:02:45,054 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:45,054 INFO L85 PathProgramCache]: Analyzing trace with hash 262800198, now seen corresponding path program 2 times [2022-04-07 00:02:45,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:45,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466049975] [2022-04-07 00:02:45,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:45,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:45,061 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:45,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434129681] [2022-04-07 00:02:45,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:45,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:45,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:45,066 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) [2022-04-07 00:02:45,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-07 00:02:45,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:45,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:45,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-07 00:02:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-07 00:02:45,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-07 00:02:45,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466049975] [2022-04-07 00:02:45,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:45,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434129681] [2022-04-07 00:02:45,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434129681] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-07 00:02:45,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:02:45,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-07 00:02:45,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:45,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1261023052] [2022-04-07 00:02:45,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1261023052] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:45,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:45,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:02:45,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517748161] [2022-04-07 00:02:45,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:45,299 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:02:45,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:02:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:02:45,300 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:02:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:45,458 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-04-07 00:02:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:02:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-04-07 00:02:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:45,460 INFO L225 Difference]: With dead ends: 65 [2022-04-07 00:02:45,460 INFO L226 Difference]: Without dead ends: 53 [2022-04-07 00:02:45,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:02:45,461 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:45,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 125 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:02:45,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-07 00:02:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-04-07 00:02:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 38 states have internal predecessors, (46), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:02:45,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2022-04-07 00:02:45,468 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 39 [2022-04-07 00:02:45,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:45,468 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2022-04-07 00:02:45,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:02:45,469 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2022-04-07 00:02:45,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:02:45,469 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:45,469 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-07 00:02:45,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-07 00:02:45,669 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 [2022-04-07 00:02:45,670 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:45,670 INFO L85 PathProgramCache]: Analyzing trace with hash 844519116, now seen corresponding path program 1 times [2022-04-07 00:02:45,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:45,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117107714] [2022-04-07 00:02:45,671 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash 844519116, now seen corresponding path program 2 times [2022-04-07 00:02:45,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:45,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731424506] [2022-04-07 00:02:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:45,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:45,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:45,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814303531] [2022-04-07 00:02:45,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:45,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:45,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:45,687 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) [2022-04-07 00:02:45,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-07 00:02:45,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:45,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:45,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-07 00:02:45,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-07 00:02:45,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:02:46,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731424506] [2022-04-07 00:02:46,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814303531] [2022-04-07 00:02:46,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814303531] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:02:46,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:02:46,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-07 00:02:46,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:46,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117107714] [2022-04-07 00:02:46,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117107714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:46,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:46,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:02:46,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888638405] [2022-04-07 00:02:46,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:46,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:02:46,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:02:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:02:46,185 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:02:46,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:46,427 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2022-04-07 00:02:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:02:46,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 38 [2022-04-07 00:02:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:46,428 INFO L225 Difference]: With dead ends: 78 [2022-04-07 00:02:46,428 INFO L226 Difference]: Without dead ends: 65 [2022-04-07 00:02:46,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:02:46,429 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:46,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 110 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-07 00:02:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-07 00:02:46,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2022-04-07 00:02:46,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 46 states have internal predecessors, (57), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-07 00:02:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-04-07 00:02:46,438 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 38 [2022-04-07 00:02:46,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:46,438 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-04-07 00:02:46,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-04-07 00:02:46,439 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-04-07 00:02:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-07 00:02:46,439 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:46,439 INFO L499 BasicCegarLoop]: trace histogram [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, 1] [2022-04-07 00:02:46,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-04-07 00:02:46,656 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 [2022-04-07 00:02:46,657 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:46,657 INFO L85 PathProgramCache]: Analyzing trace with hash 901777418, now seen corresponding path program 1 times [2022-04-07 00:02:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:46,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051487733] [2022-04-07 00:02:46,658 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:46,658 INFO L85 PathProgramCache]: Analyzing trace with hash 901777418, now seen corresponding path program 2 times [2022-04-07 00:02:46,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:46,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057166818] [2022-04-07 00:02:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:46,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:46,665 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:46,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974175437] [2022-04-07 00:02:46,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:46,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:46,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:46,668 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) [2022-04-07 00:02:46,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-07 00:02:46,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:46,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:46,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-07 00:02:46,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:46,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:02:46,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:46,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-04-07 00:02:46,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057166818] [2022-04-07 00:02:46,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974175437] [2022-04-07 00:02:46,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974175437] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-07 00:02:46,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:02:46,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-07 00:02:46,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:46,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051487733] [2022-04-07 00:02:46,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051487733] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:46,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:46,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-07 00:02:46,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925232887] [2022-04-07 00:02:46,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:46,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-07 00:02:46,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:46,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-07 00:02:46,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-07 00:02:46,920 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:02:47,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:47,040 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-04-07 00:02:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-07 00:02:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-04-07 00:02:47,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:47,041 INFO L225 Difference]: With dead ends: 69 [2022-04-07 00:02:47,042 INFO L226 Difference]: Without dead ends: 65 [2022-04-07 00:02:47,042 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-07 00:02:47,042 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:47,042 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 79 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:02:47,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-07 00:02:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-04-07 00:02:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-07 00:02:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-04-07 00:02:47,051 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 38 [2022-04-07 00:02:47,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:47,059 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-04-07 00:02:47,059 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-07 00:02:47,059 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-04-07 00:02:47,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-07 00:02:47,060 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:47,060 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:02:47,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-07 00:02:47,260 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 [2022-04-07 00:02:47,261 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash -982526417, now seen corresponding path program 1 times [2022-04-07 00:02:47,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:47,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1802693823] [2022-04-07 00:02:47,262 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:47,262 INFO L85 PathProgramCache]: Analyzing trace with hash -982526417, now seen corresponding path program 2 times [2022-04-07 00:02:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47809351] [2022-04-07 00:02:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:47,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:47,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890628325] [2022-04-07 00:02:47,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:47,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:47,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:47,270 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) [2022-04-07 00:02:47,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-07 00:02:47,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:47,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:47,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-07 00:02:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-07 00:02:47,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-07 00:02:47,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47809351] [2022-04-07 00:02:47,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:47,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890628325] [2022-04-07 00:02:47,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890628325] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:02:47,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:02:47,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-04-07 00:02:47,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:47,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1802693823] [2022-04-07 00:02:47,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1802693823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:47,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:47,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:02:47,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465155097] [2022-04-07 00:02:47,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:47,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:02:47,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:47,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:02:47,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-07 00:02:47,715 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:02:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:47,797 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2022-04-07 00:02:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:02:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-04-07 00:02:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:47,799 INFO L225 Difference]: With dead ends: 74 [2022-04-07 00:02:47,799 INFO L226 Difference]: Without dead ends: 69 [2022-04-07 00:02:47,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-07 00:02:47,799 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 38 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:47,800 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 92 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-07 00:02:47,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-07 00:02:47,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2022-04-07 00:02:47,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.3125) internal successors, (63), 48 states have internal predecessors, (63), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-07 00:02:47,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2022-04-07 00:02:47,812 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 42 [2022-04-07 00:02:47,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:47,812 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2022-04-07 00:02:47,812 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:02:47,812 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2022-04-07 00:02:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-07 00:02:47,813 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:47,813 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:02:47,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-07 00:02:48,034 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 [2022-04-07 00:02:48,034 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 1 times [2022-04-07 00:02:48,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:48,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046528652] [2022-04-07 00:02:48,035 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:48,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1669465851, now seen corresponding path program 2 times [2022-04-07 00:02:48,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:48,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119974415] [2022-04-07 00:02:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:48,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:48,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:48,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018234683] [2022-04-07 00:02:48,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:48,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:48,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:48,049 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) [2022-04-07 00:02:48,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-07 00:02:48,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:48,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:48,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-07 00:02:48,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:48,193 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-07 00:02:48,563 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-07 00:02:48,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:48,740 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:02:48,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:48,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119974415] [2022-04-07 00:02:48,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:48,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018234683] [2022-04-07 00:02:48,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018234683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:02:48,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:02:48,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-07 00:02:48,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:48,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2046528652] [2022-04-07 00:02:48,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2046528652] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:48,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:48,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:02:48,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253075201] [2022-04-07 00:02:48,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:48,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:02:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:02:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:02:48,742 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:02:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:50,078 INFO L93 Difference]: Finished difference Result 78 states and 100 transitions. [2022-04-07 00:02:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-07 00:02:50,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-04-07 00:02:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:50,079 INFO L225 Difference]: With dead ends: 78 [2022-04-07 00:02:50,079 INFO L226 Difference]: Without dead ends: 73 [2022-04-07 00:02:50,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-04-07 00:02:50,080 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:50,080 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 134 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-07 00:02:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-07 00:02:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-04-07 00:02:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-07 00:02:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2022-04-07 00:02:50,091 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 43 [2022-04-07 00:02:50,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:50,091 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2022-04-07 00:02:50,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:02:50,091 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2022-04-07 00:02:50,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-07 00:02:50,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:50,092 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:02:50,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-07 00:02:50,307 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 [2022-04-07 00:02:50,307 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 1 times [2022-04-07 00:02:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:50,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235113455] [2022-04-07 00:02:50,308 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1372706166, now seen corresponding path program 2 times [2022-04-07 00:02:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:50,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757136875] [2022-04-07 00:02:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:50,327 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:50,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [574184777] [2022-04-07 00:02:50,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:50,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:50,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:50,329 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) [2022-04-07 00:02:50,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-07 00:02:50,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:50,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:50,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-07 00:02:50,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-04-07 00:02:50,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:02:50,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757136875] [2022-04-07 00:02:50,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:50,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574184777] [2022-04-07 00:02:50,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574184777] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:02:50,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:02:50,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-07 00:02:50,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:50,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235113455] [2022-04-07 00:02:50,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235113455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:50,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:50,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:02:50,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114972952] [2022-04-07 00:02:50,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:50,609 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:02:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:02:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:02:50,610 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:02:52,640 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:02:54,927 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:02:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:02:55,395 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2022-04-07 00:02:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:02:55,395 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 44 [2022-04-07 00:02:55,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:02:55,396 INFO L225 Difference]: With dead ends: 85 [2022-04-07 00:02:55,396 INFO L226 Difference]: Without dead ends: 80 [2022-04-07 00:02:55,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:02:55,396 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 10 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-07 00:02:55,396 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 144 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-04-07 00:02:55,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-07 00:02:55,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2022-04-07 00:02:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-07 00:02:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-04-07 00:02:55,406 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 44 [2022-04-07 00:02:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:02:55,407 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-04-07 00:02:55,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:02:55,407 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-04-07 00:02:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-07 00:02:55,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:02:55,407 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-07 00:02:55,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-07 00:02:55,623 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 [2022-04-07 00:02:55,623 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:02:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:02:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 1 times [2022-04-07 00:02:55,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:55,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401316188] [2022-04-07 00:02:55,624 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:02:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1114540728, now seen corresponding path program 2 times [2022-04-07 00:02:55,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:02:55,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696621036] [2022-04-07 00:02:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:02:55,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:02:55,637 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:02:55,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055520707] [2022-04-07 00:02:55,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:02:55,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:02:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:02:55,652 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) [2022-04-07 00:02:55,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-07 00:02:55,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:02:55,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:02:55,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-07 00:02:55,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:02:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-07 00:02:56,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:02:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-07 00:02:56,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:02:56,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696621036] [2022-04-07 00:02:56,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:02:56,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055520707] [2022-04-07 00:02:56,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055520707] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:02:56,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:02:56,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-04-07 00:02:56,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:02:56,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401316188] [2022-04-07 00:02:56,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401316188] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:02:56,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:02:56,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:02:56,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136386190] [2022-04-07 00:02:56,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:02:56,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:02:56,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:02:56,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:02:56,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:02:56,333 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:02:58,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:03:00,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:03:01,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:03:01,065 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-04-07 00:03:01,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-07 00:03:01,065 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2022-04-07 00:03:01,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:03:01,066 INFO L225 Difference]: With dead ends: 78 [2022-04-07 00:03:01,066 INFO L226 Difference]: Without dead ends: 73 [2022-04-07 00:03:01,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-04-07 00:03:01,067 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 11 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:03:01,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 126 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 208 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2022-04-07 00:03:01,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-07 00:03:01,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 67. [2022-04-07 00:03:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 48 states have (on average 1.25) internal successors, (60), 48 states have internal predecessors, (60), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-07 00:03:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-04-07 00:03:01,078 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 44 [2022-04-07 00:03:01,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:03:01,078 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-04-07 00:03:01,078 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-04-07 00:03:01,078 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-04-07 00:03:01,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-07 00:03:01,079 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:03:01,079 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-04-07 00:03:01,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-07 00:03:01,295 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 [2022-04-07 00:03:01,295 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:03:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:03:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1275543934, now seen corresponding path program 1 times [2022-04-07 00:03:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:01,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1227529855] [2022-04-07 00:03:01,296 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:03:01,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1275543934, now seen corresponding path program 2 times [2022-04-07 00:03:01,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:03:01,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431100524] [2022-04-07 00:03:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:03:01,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:03:01,302 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:03:01,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497803407] [2022-04-07 00:03:01,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:03:01,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:03:01,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:03:01,306 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) [2022-04-07 00:03:01,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-07 00:03:01,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:03:01,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:03:01,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-07 00:03:01,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:03:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-07 00:03:01,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:03:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-07 00:03:01,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:03:01,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431100524] [2022-04-07 00:03:01,575 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:03:01,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497803407] [2022-04-07 00:03:01,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497803407] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:03:01,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:03:01,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-07 00:03:01,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:03:01,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1227529855] [2022-04-07 00:03:01,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1227529855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:03:01,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:03:01,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:03:01,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869481402] [2022-04-07 00:03:01,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:03:01,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:03:01,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:03:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-04-07 00:03:01,576 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:03:03,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:03:04,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:03:04,133 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2022-04-07 00:03:04,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:03:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2022-04-07 00:03:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:03:04,134 INFO L225 Difference]: With dead ends: 81 [2022-04-07 00:03:04,134 INFO L226 Difference]: Without dead ends: 76 [2022-04-07 00:03:04,134 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-07 00:03:04,134 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 11 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-07 00:03:04,135 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 150 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2022-04-07 00:03:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-07 00:03:04,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2022-04-07 00:03:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-07 00:03:04,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-04-07 00:03:04,144 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 51 [2022-04-07 00:03:04,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:03:04,144 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-04-07 00:03:04,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-07 00:03:04,144 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-04-07 00:03:04,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-07 00:03:04,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:03:04,145 INFO L499 BasicCegarLoop]: trace histogram [4, 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, 1] [2022-04-07 00:03:04,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-07 00:03:04,359 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 [2022-04-07 00:03:04,359 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:03:04,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:03:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 1 times [2022-04-07 00:03:04,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:04,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443485549] [2022-04-07 00:03:04,360 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:03:04,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2079436449, now seen corresponding path program 2 times [2022-04-07 00:03:04,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:03:04,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406143744] [2022-04-07 00:03:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:03:04,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:03:04,366 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:03:04,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671775960] [2022-04-07 00:03:04,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:03:04,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:03:04,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:03:04,371 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) [2022-04-07 00:03:04,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-07 00:03:04,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:03:04,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:03:04,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-07 00:03:04,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:03:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:03:04,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:03:04,944 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-04-07 00:03:04,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:03:04,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406143744] [2022-04-07 00:03:04,945 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:03:04,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671775960] [2022-04-07 00:03:04,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671775960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:03:04,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:03:04,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2022-04-07 00:03:04,945 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:03:04,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443485549] [2022-04-07 00:03:04,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443485549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:03:04,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:03:04,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-07 00:03:04,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487859560] [2022-04-07 00:03:04,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:03:04,946 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-07 00:03:04,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:04,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-07 00:03:04,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-04-07 00:03:04,946 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-07 00:03:07,333 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:03:08,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:03:08,144 INFO L93 Difference]: Finished difference Result 88 states and 113 transitions. [2022-04-07 00:03:08,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-07 00:03:08,145 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 52 [2022-04-07 00:03:08,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:03:08,146 INFO L225 Difference]: With dead ends: 88 [2022-04-07 00:03:08,146 INFO L226 Difference]: Without dead ends: 83 [2022-04-07 00:03:08,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-04-07 00:03:08,146 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 42 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-07 00:03:08,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 163 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 281 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2022-04-07 00:03:08,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-07 00:03:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-04-07 00:03:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-07 00:03:08,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-04-07 00:03:08,160 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 52 [2022-04-07 00:03:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:03:08,161 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-04-07 00:03:08,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 6 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-04-07 00:03:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-04-07 00:03:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-07 00:03:08,161 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:03:08,161 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-04-07 00:03:08,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-07 00:03:08,362 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 [2022-04-07 00:03:08,362 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:03:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:03:08,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1287237523, now seen corresponding path program 1 times [2022-04-07 00:03:08,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:08,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1277756768] [2022-04-07 00:03:08,363 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:03:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1287237523, now seen corresponding path program 2 times [2022-04-07 00:03:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:03:08,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668423650] [2022-04-07 00:03:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:03:08,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:03:08,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:03:08,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568365577] [2022-04-07 00:03:08,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:03:08,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:03:08,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:03:08,387 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) [2022-04-07 00:03:08,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-07 00:03:08,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:03:08,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:03:08,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-07 00:03:08,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:03:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:03:08,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:03:08,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-07 00:03:08,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:03:08,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668423650] [2022-04-07 00:03:08,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:03:08,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568365577] [2022-04-07 00:03:08,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568365577] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-07 00:03:08,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:03:08,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 15 [2022-04-07 00:03:08,819 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:03:08,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1277756768] [2022-04-07 00:03:08,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1277756768] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:03:08,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:03:08,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-07 00:03:08,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029033599] [2022-04-07 00:03:08,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:03:08,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-07 00:03:08,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-07 00:03:08,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-04-07 00:03:08,820 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-07 00:03:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:03:09,004 INFO L93 Difference]: Finished difference Result 108 states and 142 transitions. [2022-04-07 00:03:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-07 00:03:09,005 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-04-07 00:03:09,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:03:09,005 INFO L225 Difference]: With dead ends: 108 [2022-04-07 00:03:09,006 INFO L226 Difference]: Without dead ends: 76 [2022-04-07 00:03:09,006 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-04-07 00:03:09,006 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-07 00:03:09,006 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 127 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-07 00:03:09,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-07 00:03:09,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-04-07 00:03:09,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 49 states have internal predecessors, (59), 13 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-07 00:03:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-04-07 00:03:09,020 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 53 [2022-04-07 00:03:09,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:03:09,020 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-04-07 00:03:09,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-07 00:03:09,020 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-04-07 00:03:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-07 00:03:09,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:03:09,021 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-04-07 00:03:09,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-07 00:03:09,231 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 [2022-04-07 00:03:09,231 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:03:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:03:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash 338559610, now seen corresponding path program 3 times [2022-04-07 00:03:09,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:09,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [916997439] [2022-04-07 00:03:09,232 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:03:09,232 INFO L85 PathProgramCache]: Analyzing trace with hash 338559610, now seen corresponding path program 4 times [2022-04-07 00:03:09,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:03:09,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917115278] [2022-04-07 00:03:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:03:09,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:03:09,238 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:03:09,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719179245] [2022-04-07 00:03:09,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:03:09,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:03:09,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:03:09,244 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) [2022-04-07 00:03:09,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-07 00:03:09,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:03:09,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:03:09,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-07 00:03:09,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:03:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-07 00:03:09,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:03:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-04-07 00:03:10,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:03:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917115278] [2022-04-07 00:03:10,030 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:03:10,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719179245] [2022-04-07 00:03:10,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719179245] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-07 00:03:10,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:03:10,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 21 [2022-04-07 00:03:10,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:03:10,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [916997439] [2022-04-07 00:03:10,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [916997439] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:03:10,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:03:10,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-07 00:03:10,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256172498] [2022-04-07 00:03:10,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:03:10,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-07 00:03:10,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:10,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-07 00:03:10,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:03:10,032 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-07 00:03:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:03:10,477 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2022-04-07 00:03:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-07 00:03:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 54 [2022-04-07 00:03:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:03:10,478 INFO L225 Difference]: With dead ends: 97 [2022-04-07 00:03:10,478 INFO L226 Difference]: Without dead ends: 74 [2022-04-07 00:03:10,479 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-04-07 00:03:10,480 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 23 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:03:10,480 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 129 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-07 00:03:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-07 00:03:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-07 00:03:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.2452830188679245) internal successors, (66), 54 states have internal predecessors, (66), 14 states have call successors, (14), 8 states have call predecessors, (14), 6 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-07 00:03:10,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2022-04-07 00:03:10,498 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 54 [2022-04-07 00:03:10,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:03:10,498 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2022-04-07 00:03:10,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-04-07 00:03:10,498 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2022-04-07 00:03:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-07 00:03:10,501 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:03:10,501 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-04-07 00:03:10,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-07 00:03:10,702 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 [2022-04-07 00:03:10,702 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:03:10,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:03:10,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 3 times [2022-04-07 00:03:10,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:10,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [63636040] [2022-04-07 00:03:10,703 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:03:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1563197702, now seen corresponding path program 4 times [2022-04-07 00:03:10,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:03:10,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032398591] [2022-04-07 00:03:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:03:10,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:03:10,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:03:10,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1746617854] [2022-04-07 00:03:10,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-07 00:03:10,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:03:10,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:03:10,710 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) [2022-04-07 00:03:10,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-07 00:03:10,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-07 00:03:10,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:03:10,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-07 00:03:10,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:03:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-04-07 00:03:11,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:03:11,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:03:11,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032398591] [2022-04-07 00:03:11,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:03:11,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746617854] [2022-04-07 00:03:11,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746617854] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-07 00:03:11,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-07 00:03:11,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-04-07 00:03:11,968 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:03:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [63636040] [2022-04-07 00:03:11,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [63636040] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:03:11,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:03:11,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-07 00:03:11,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340492] [2022-04-07 00:03:11,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:03:11,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-07 00:03:11,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-07 00:03:11,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:03:11,978 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-07 00:03:12,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:03:12,460 INFO L93 Difference]: Finished difference Result 102 states and 134 transitions. [2022-04-07 00:03:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-07 00:03:12,460 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 60 [2022-04-07 00:03:12,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:03:12,461 INFO L225 Difference]: With dead ends: 102 [2022-04-07 00:03:12,461 INFO L226 Difference]: Without dead ends: 97 [2022-04-07 00:03:12,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-04-07 00:03:12,462 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:03:12,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 181 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 451 Invalid, 0 Unknown, 133 Unchecked, 0.3s Time] [2022-04-07 00:03:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-07 00:03:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2022-04-07 00:03:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.25) internal successors, (70), 57 states have internal predecessors, (70), 15 states have call successors, (15), 8 states have call predecessors, (15), 6 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-07 00:03:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 98 transitions. [2022-04-07 00:03:12,482 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 98 transitions. Word has length 60 [2022-04-07 00:03:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:03:12,482 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 98 transitions. [2022-04-07 00:03:12,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 16 states have internal predecessors, (30), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-04-07 00:03:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 98 transitions. [2022-04-07 00:03:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-07 00:03:12,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:03:12,483 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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, 1] [2022-04-07 00:03:12,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-07 00:03:12,699 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 [2022-04-07 00:03:12,699 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:03:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:03:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1988072646, now seen corresponding path program 1 times [2022-04-07 00:03:12,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2086443291] [2022-04-07 00:03:12,700 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:03:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1988072646, now seen corresponding path program 2 times [2022-04-07 00:03:12,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:03:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836771098] [2022-04-07 00:03:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:03:12,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:03:12,707 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:03:12,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [309969497] [2022-04-07 00:03:12,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-07 00:03:12,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:03:12,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:03:12,718 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) [2022-04-07 00:03:12,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-07 00:03:12,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-07 00:03:12,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:03:12,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-07 00:03:12,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:03:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-04-07 00:03:13,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:03:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-07 00:03:13,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:03:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836771098] [2022-04-07 00:03:13,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:03:13,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309969497] [2022-04-07 00:03:13,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309969497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:03:13,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:03:13,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 21 [2022-04-07 00:03:13,527 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:03:13,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2086443291] [2022-04-07 00:03:13,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2086443291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:03:13,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:03:13,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-07 00:03:13,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165916282] [2022-04-07 00:03:13,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:03:13,527 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-07 00:03:13,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-07 00:03:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-07 00:03:13,528 INFO L87 Difference]: Start difference. First operand 78 states and 98 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-07 00:03:16,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:03:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:03:16,922 INFO L93 Difference]: Finished difference Result 110 states and 144 transitions. [2022-04-07 00:03:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-07 00:03:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 61 [2022-04-07 00:03:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:03:16,923 INFO L225 Difference]: With dead ends: 110 [2022-04-07 00:03:16,923 INFO L226 Difference]: Without dead ends: 105 [2022-04-07 00:03:16,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2022-04-07 00:03:16,924 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-07 00:03:16,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 149 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 395 Invalid, 1 Unknown, 2 Unchecked, 2.8s Time] [2022-04-07 00:03:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-07 00:03:16,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2022-04-07 00:03:16,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.25) internal successors, (75), 61 states have internal predecessors, (75), 16 states have call successors, (16), 8 states have call predecessors, (16), 6 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-07 00:03:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2022-04-07 00:03:16,948 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 61 [2022-04-07 00:03:16,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:03:16,948 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2022-04-07 00:03:16,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2022-04-07 00:03:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2022-04-07 00:03:16,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-07 00:03:16,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-07 00:03:16,949 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-04-07 00:03:16,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-07 00:03:17,163 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 [2022-04-07 00:03:17,164 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-07 00:03:17,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-07 00:03:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 165486739, now seen corresponding path program 5 times [2022-04-07 00:03:17,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:17,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133318033] [2022-04-07 00:03:17,165 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-07 00:03:17,165 INFO L85 PathProgramCache]: Analyzing trace with hash 165486739, now seen corresponding path program 6 times [2022-04-07 00:03:17,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-07 00:03:17,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764962560] [2022-04-07 00:03:17,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-07 00:03:17,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-07 00:03:17,170 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-07 00:03:17,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066926396] [2022-04-07 00:03:17,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-07 00:03:17,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-07 00:03:17,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-07 00:03:17,171 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) [2022-04-07 00:03:17,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-07 00:03:17,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-07 00:03:17,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-07 00:03:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-07 00:03:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-07 00:03:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-07 00:03:17,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-07 00:03:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-07 00:03:17,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-07 00:03:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764962560] [2022-04-07 00:03:17,496 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-07 00:03:17,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066926396] [2022-04-07 00:03:17,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066926396] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-07 00:03:17,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-07 00:03:17,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-04-07 00:03:17,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-07 00:03:17,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133318033] [2022-04-07 00:03:17,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133318033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-07 00:03:17,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-07 00:03:17,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-07 00:03:17,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026191136] [2022-04-07 00:03:17,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-07 00:03:17,497 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-07 00:03:17,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-07 00:03:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-07 00:03:17,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-07 00:03:17,498 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:03:19,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-07 00:03:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-07 00:03:19,841 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2022-04-07 00:03:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-07 00:03:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2022-04-07 00:03:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-07 00:03:19,841 INFO L225 Difference]: With dead ends: 83 [2022-04-07 00:03:19,841 INFO L226 Difference]: Without dead ends: 0 [2022-04-07 00:03:19,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-04-07 00:03:19,842 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-07 00:03:19,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-04-07 00:03:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-07 00:03:19,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-07 00:03:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-07 00:03:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-07 00:03:19,843 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2022-04-07 00:03:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-07 00:03:19,843 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-07 00:03:19,843 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-04-07 00:03:19,843 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-07 00:03:19,843 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-07 00:03:19,845 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-07 00:03:19,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-07 00:03:20,056 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 [2022-04-07 00:03:20,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-07 00:03:41,499 WARN L232 SmtUtils]: Spent 20.28s on a formula simplification. DAG size of input: 181 DAG size of output: 174 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-07 00:03:48,695 WARN L232 SmtUtils]: Spent 7.17s on a formula simplification. DAG size of input: 193 DAG size of output: 183 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-07 00:04:00,416 WARN L232 SmtUtils]: Spent 10.53s on a formula simplification. DAG size of input: 201 DAG size of output: 186 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-07 00:04:40,509 WARN L232 SmtUtils]: Spent 37.58s on a formula simplification. DAG size of input: 161 DAG size of output: 34 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-07 00:05:17,881 WARN L232 SmtUtils]: Spent 37.26s on a formula simplification. DAG size of input: 171 DAG size of output: 33 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-07 00:06:02,204 WARN L232 SmtUtils]: Spent 43.87s on a formula simplification. DAG size of input: 174 DAG size of output: 33 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-07 00:06:27,288 WARN L232 SmtUtils]: Spent 25.05s on a formula simplification. DAG size of input: 170 DAG size of output: 26 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-07 00:06:27,291 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-04-07 00:06:27,291 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-04-07 00:06:27,291 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-04-07 00:06:27,291 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-04-07 00:06:27,291 INFO L878 garLoopResultBuilder]: At program point L9(line 9) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-07 00:06:27,291 INFO L878 garLoopResultBuilder]: At program point L9-2(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-07 00:06:27,291 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 8 10) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-07 00:06:27,291 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (<= 1 main_~y~0)) [2022-04-07 00:06:27,291 INFO L885 garLoopResultBuilder]: At program point L58(line 58) the Hoare annotation is: true [2022-04-07 00:06:27,291 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 19 60) the Hoare annotation is: true [2022-04-07 00:06:27,291 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 19 60) the Hoare annotation is: true [2022-04-07 00:06:27,291 INFO L878 garLoopResultBuilder]: At program point L44(lines 44 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0))) [2022-04-07 00:06:27,291 INFO L878 garLoopResultBuilder]: At program point L40(lines 40 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0))) [2022-04-07 00:06:27,292 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 55) the Hoare annotation is: (and (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-04-07 00:06:27,292 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 19 60) the Hoare annotation is: true [2022-04-07 00:06:27,292 INFO L878 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: (and (<= main_~x~0 10) (<= 0 main_~x~0)) [2022-04-07 00:06:27,292 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= main_~y~0 10) (<= 0 (+ (div (+ (- 2) main_~y~0) 2) 1)) (<= main_~x~0 10) (<= 0 main_~x~0)) [2022-04-07 00:06:27,292 INFO L878 garLoopResultBuilder]: At program point L57(line 57) the Hoare annotation is: (and (<= main_~x~0 10) (<= 0 main_~x~0) (<= 1 main_~y~0) (= (* main_~b~0 main_~a~0) 0)) [2022-04-07 00:06:27,292 INFO L885 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-04-07 00:06:27,292 INFO L878 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: (and (<= main_~x~0 10) (<= 0 main_~x~0)) [2022-04-07 00:06:27,292 INFO L878 garLoopResultBuilder]: At program point L47(lines 47 54) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (not (= main_~b~0 0)) (not (= main_~a~0 0)) (<= 1 main_~y~0))) [2022-04-07 00:06:27,292 INFO L878 garLoopResultBuilder]: At program point L47-2(lines 34 55) the Hoare annotation is: (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-04-07 00:06:27,292 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) (* main_~y~0 main_~x~0)) (<= 1 main_~y~0)) [2022-04-07 00:06:27,293 INFO L878 garLoopResultBuilder]: At program point L35-1(lines 34 55) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~x~0))) (and (<= main_~y~0 10) (<= main_~x~0 10) (<= 0 main_~x~0) (= (+ main_~q~0 (* main_~b~0 main_~a~0 main_~p~0)) .cse0) (or (= (mod (+ .cse0 (* (- 1) main_~q~0)) (* main_~b~0 main_~a~0)) 0) (= main_~q~0 .cse0)) (<= 1 main_~y~0))) [2022-04-07 00:06:27,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-07 00:06:27,293 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-07 00:06:27,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-07 00:06:27,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-07 00:06:27,293 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-07 00:06:27,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-07 00:06:27,293 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-07 00:06:27,293 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-04-07 00:06:27,293 INFO L878 garLoopResultBuilder]: At program point L13(lines 13 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-07 00:06:27,293 INFO L878 garLoopResultBuilder]: At program point L12(lines 12 15) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:06:27,293 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:06:27,293 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 11 17) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2022-04-07 00:06:27,293 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-07 00:06:27,295 INFO L719 BasicCegarLoop]: Path program histogram: [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2] [2022-04-07 00:06:27,296 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-07 00:06:27,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.04 12:06:27 BoogieIcfgContainer [2022-04-07 00:06:27,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-07 00:06:27,306 INFO L158 Benchmark]: Toolchain (without parser) took 231408.71ms. Allocated memory was 174.1MB in the beginning and 302.0MB in the end (delta: 127.9MB). Free memory was 125.3MB in the beginning and 207.8MB in the end (delta: -82.4MB). Peak memory consumption was 162.3MB. Max. memory is 8.0GB. [2022-04-07 00:06:27,306 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 174.1MB. Free memory was 141.5MB in the beginning and 141.4MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-07 00:06:27,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.80ms. Allocated memory is still 174.1MB. Free memory was 125.1MB in the beginning and 149.3MB in the end (delta: -24.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-07 00:06:27,306 INFO L158 Benchmark]: Boogie Preprocessor took 18.40ms. Allocated memory is still 174.1MB. Free memory was 149.3MB in the beginning and 147.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-07 00:06:27,306 INFO L158 Benchmark]: RCFGBuilder took 304.77ms. Allocated memory is still 174.1MB. Free memory was 147.9MB in the beginning and 136.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-07 00:06:27,307 INFO L158 Benchmark]: TraceAbstraction took 230879.62ms. Allocated memory was 174.1MB in the beginning and 302.0MB in the end (delta: 127.9MB). Free memory was 136.3MB in the beginning and 207.8MB in the end (delta: -71.4MB). Peak memory consumption was 174.2MB. Max. memory is 8.0GB. [2022-04-07 00:06:27,307 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 174.1MB. Free memory was 141.5MB in the beginning and 141.4MB in the end (delta: 151.8kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 202.80ms. Allocated memory is still 174.1MB. Free memory was 125.1MB in the beginning and 149.3MB in the end (delta: -24.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.40ms. Allocated memory is still 174.1MB. Free memory was 149.3MB in the beginning and 147.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 304.77ms. Allocated memory is still 174.1MB. Free memory was 147.9MB in the beginning and 136.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 230879.62ms. Allocated memory was 174.1MB in the beginning and 302.0MB in the end (delta: 127.9MB). Free memory was 136.3MB in the beginning and 207.8MB in the end (delta: -71.4MB). Peak memory consumption was 174.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 230.8s, OverallIterations: 19, TraceHistogramMax: 5, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 27.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 187.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 9 mSolverCounterUnknown, 545 SdHoareTripleChecker+Valid, 25.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 503 mSDsluCounter, 2313 SdHoareTripleChecker+Invalid, 24.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 135 IncrementalHoareTripleChecker+Unchecked, 1837 mSDsCounter, 198 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3250 IncrementalHoareTripleChecker+Invalid, 3592 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 198 mSolverCounterUnsat, 476 mSDtfsCounter, 3250 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1612 GetRequests, 1311 SyntacticMatches, 17 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=18, InterpolantAutomatonStates: 198, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 125 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 34 LocationsWithAnnotation, 272 PreInvPairs, 401 NumberOfFragments, 377 HoareAnnotationTreeSize, 272 FomulaSimplifications, 53824 FormulaSimplificationTreeSizeReduction, 42.6s HoareSimplificationTime, 34 FomulaSimplificationsInter, 1066890 FormulaSimplificationTreeSizeReductionInter, 144.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (((y <= 10 && x <= 10) && 0 <= x) && q + b * a * p == y * x) && 1 <= y - ProcedureContractResult [Line: 8]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 19]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 11]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: \old(cond) == cond || !(1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2022-04-07 00:06:27,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...