/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/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 18:30:37,156 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 18:30:37,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 18:30:37,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 18:30:37,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 18:30:37,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 18:30:37,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 18:30:37,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 18:30:37,251 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 18:30:37,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 18:30:37,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 18:30:37,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 18:30:37,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 18:30:37,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 18:30:37,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 18:30:37,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 18:30:37,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 18:30:37,254 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 18:30:37,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 18:30:37,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 18:30:37,254 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:30:37,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 18:30:37,255 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 18:30:37,439 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 18:30:37,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 18:30:37,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 18:30:37,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 18:30:37,458 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 18:30:37,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2022-03-20 18:30:37,502 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988eddc47/a5da5d21b40e4d9893c0fb32cbcbc353/FLAG254b4be77 [2022-03-20 18:30:37,849 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 18:30:37,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2022-03-20 18:30:37,856 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988eddc47/a5da5d21b40e4d9893c0fb32cbcbc353/FLAG254b4be77 [2022-03-20 18:30:37,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/988eddc47/a5da5d21b40e4d9893c0fb32cbcbc353 [2022-03-20 18:30:37,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 18:30:37,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 18:30:37,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 18:30:37,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 18:30:37,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 18:30:37,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:30:37" (1/1) ... [2022-03-20 18:30:37,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d47d676 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:37, skipping insertion in model container [2022-03-20 18:30:37,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 06:30:37" (1/1) ... [2022-03-20 18:30:37,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 18:30:37,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 18:30:38,015 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904] [2022-03-20 18:30:38,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:30:38,028 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 18:30:38,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i[891,904] [2022-03-20 18:30:38,038 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 18:30:38,046 INFO L208 MainTranslator]: Completed translation [2022-03-20 18:30:38,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38 WrapperNode [2022-03-20 18:30:38,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 18:30:38,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 18:30:38,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 18:30:38,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 18:30:38,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (1/1) ... [2022-03-20 18:30:38,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (1/1) ... [2022-03-20 18:30:38,061 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (1/1) ... [2022-03-20 18:30:38,061 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (1/1) ... [2022-03-20 18:30:38,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (1/1) ... [2022-03-20 18:30:38,066 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (1/1) ... [2022-03-20 18:30:38,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (1/1) ... [2022-03-20 18:30:38,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 18:30:38,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 18:30:38,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 18:30:38,070 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 18:30:38,071 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (1/1) ... [2022-03-20 18:30:38,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 18:30:38,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:38,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 18:30:38,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 18:30:38,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 18:30:38,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 18:30:38,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 18:30:38,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 18:30:38,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 18:30:38,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 18:30:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 18:30:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 18:30:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 18:30:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 18:30:38,132 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 18:30:38,133 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 18:30:38,183 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 18:30:38,184 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 18:30:38,294 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 18:30:38,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 18:30:38,308 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 18:30:38,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:30:38 BoogieIcfgContainer [2022-03-20 18:30:38,312 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 18:30:38,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 18:30:38,313 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 18:30:38,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 18:30:38,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 06:30:37" (1/3) ... [2022-03-20 18:30:38,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c61d35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:30:38, skipping insertion in model container [2022-03-20 18:30:38,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 06:30:38" (2/3) ... [2022-03-20 18:30:38,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c61d35d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 06:30:38, skipping insertion in model container [2022-03-20 18:30:38,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 06:30:38" (3/3) ... [2022-03-20 18:30:38,318 INFO L111 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2022-03-20 18:30:38,321 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 18:30:38,321 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 18:30:38,365 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 18:30:38,369 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 18:30:38,369 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 18:30:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 18:30:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 18:30:38,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:38,401 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:38,401 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:38,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1676006891, now seen corresponding path program 1 times [2022-03-20 18:30:38,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:38,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2143421927] [2022-03-20 18:30:38,426 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 18:30:38,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1676006891, now seen corresponding path program 2 times [2022-03-20 18:30:38,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:38,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339479195] [2022-03-20 18:30:38,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:38,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:38,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:38,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101708793] [2022-03-20 18:30:38,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 18:30:38,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:38,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:38,518 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:38,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 18:30:38,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 18:30:38,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 18:30:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-20 18:30:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:38,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:38,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:38,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:38,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339479195] [2022-03-20 18:30:38,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:38,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101708793] [2022-03-20 18:30:38,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101708793] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:38,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:38,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:38,672 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:38,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2143421927] [2022-03-20 18:30:38,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2143421927] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:38,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:38,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:38,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827769673] [2022-03-20 18:30:38,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:38,676 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 18:30:38,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:38,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 18:30:38,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 18:30:38,700 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:38,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:38,729 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-03-20 18:30:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 18:30:38,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-20 18:30:38,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:38,736 INFO L225 Difference]: With dead ends: 35 [2022-03-20 18:30:38,736 INFO L226 Difference]: Without dead ends: 16 [2022-03-20 18:30:38,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 18:30:38,740 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:38,741 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 18:30:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-20 18:30:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-03-20 18:30:38,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-20 18:30:38,761 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-03-20 18:30:38,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:38,762 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-20 18:30:38,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:38,762 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-20 18:30:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 18:30:38,763 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:38,763 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:38,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 18:30:38,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 18:30:38,976 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:38,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:38,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1072109235, now seen corresponding path program 1 times [2022-03-20 18:30:38,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:38,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1223571980] [2022-03-20 18:30:39,205 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:39,206 INFO L85 PathProgramCache]: Analyzing trace with hash 562650993, now seen corresponding path program 1 times [2022-03-20 18:30:39,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:39,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864996392] [2022-03-20 18:30:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:39,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:39,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:39,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066261780] [2022-03-20 18:30:39,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:39,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:39,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:39,220 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:39,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 18:30:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:39,300 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:39,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864996392] [2022-03-20 18:30:39,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066261780] [2022-03-20 18:30:39,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066261780] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:39,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:39,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:39,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:39,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1223571980] [2022-03-20 18:30:39,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1223571980] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:39,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:39,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 18:30:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625516912] [2022-03-20 18:30:39,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:39,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 18:30:39,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:39,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 18:30:39,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:30:39,462 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:39,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:39,492 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2022-03-20 18:30:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 18:30:39,493 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-03-20 18:30:39,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:39,494 INFO L225 Difference]: With dead ends: 23 [2022-03-20 18:30:39,494 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 18:30:39,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-03-20 18:30:39,499 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:39,499 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-03-20 18:30:39,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 18:30:39,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-03-20 18:30:39,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-20 18:30:39,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-03-20 18:30:39,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:39,503 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-20 18:30:39,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:39,504 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-20 18:30:39,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 18:30:39,504 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:39,504 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:39,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:39,723 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,SelfDestructingSolverStorable1 [2022-03-20 18:30:39,724 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:39,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:39,724 INFO L85 PathProgramCache]: Analyzing trace with hash 606819281, now seen corresponding path program 2 times [2022-03-20 18:30:39,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:39,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580273950] [2022-03-20 18:30:39,989 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:39,989 INFO L85 PathProgramCache]: Analyzing trace with hash 621756337, now seen corresponding path program 1 times [2022-03-20 18:30:39,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:39,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847579605] [2022-03-20 18:30:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:39,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:39,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:39,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1107481801] [2022-03-20 18:30:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:39,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:39,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:39,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:40,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 18:30:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:40,071 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:40,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:40,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847579605] [2022-03-20 18:30:40,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:40,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107481801] [2022-03-20 18:30:40,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107481801] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:40,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:40,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:40,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:40,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580273950] [2022-03-20 18:30:40,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580273950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:40,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:40,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 18:30:40,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497489783] [2022-03-20 18:30:40,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:40,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 18:30:40,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:40,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 18:30:40,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 18:30:40,189 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:40,213 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2022-03-20 18:30:40,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 18:30:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-03-20 18:30:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:40,214 INFO L225 Difference]: With dead ends: 25 [2022-03-20 18:30:40,215 INFO L226 Difference]: Without dead ends: 20 [2022-03-20 18:30:40,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-03-20 18:30:40,219 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 4 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:40,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 48 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-03-20 18:30:40,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-20 18:30:40,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-03-20 18:30:40,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-20 18:30:40,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-03-20 18:30:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:40,229 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-20 18:30:40,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:40,230 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-20 18:30:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 18:30:40,230 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:40,230 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:40,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:40,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:40,440 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:40,440 INFO L85 PathProgramCache]: Analyzing trace with hash 139772271, now seen corresponding path program 3 times [2022-03-20 18:30:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:40,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1959995484] [2022-03-20 18:30:40,582 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:40,582 INFO L85 PathProgramCache]: Analyzing trace with hash 680861681, now seen corresponding path program 1 times [2022-03-20 18:30:40,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:40,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440803045] [2022-03-20 18:30:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:40,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:40,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:40,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593647342] [2022-03-20 18:30:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:40,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:40,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:40,590 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:40,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 18:30:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:40,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:40,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:40,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:40,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440803045] [2022-03-20 18:30:40,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:40,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593647342] [2022-03-20 18:30:40,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593647342] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:40,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:40,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:40,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:40,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1959995484] [2022-03-20 18:30:40,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1959995484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:40,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:40,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 18:30:40,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719693282] [2022-03-20 18:30:40,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:40,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 18:30:40,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:40,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 18:30:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:30:40,782 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:40,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:40,804 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2022-03-20 18:30:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 18:30:40,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-03-20 18:30:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:40,806 INFO L225 Difference]: With dead ends: 27 [2022-03-20 18:30:40,806 INFO L226 Difference]: Without dead ends: 22 [2022-03-20 18:30:40,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-20 18:30:40,808 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:40,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 29 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 10 Unchecked, 0.0s Time] [2022-03-20 18:30:40,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-03-20 18:30:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-03-20 18:30:40,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:40,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-20 18:30:40,814 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-03-20 18:30:40,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:40,814 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-20 18:30:40,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:40,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-20 18:30:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 18:30:40,815 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:40,815 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:40,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:41,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:41,032 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash -2015805555, now seen corresponding path program 4 times [2022-03-20 18:30:41,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:41,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682514563] [2022-03-20 18:30:41,142 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash 739967025, now seen corresponding path program 1 times [2022-03-20 18:30:41,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:41,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361414501] [2022-03-20 18:30:41,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:41,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:41,149 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:41,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779227574] [2022-03-20 18:30:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:41,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:41,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:41,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:41,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 18:30:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:41,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:41,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:41,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:41,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:41,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361414501] [2022-03-20 18:30:41,214 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:41,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779227574] [2022-03-20 18:30:41,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779227574] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:41,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:41,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:41,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:41,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682514563] [2022-03-20 18:30:41,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682514563] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:41,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:41,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 18:30:41,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68303628] [2022-03-20 18:30:41,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:41,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 18:30:41,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 18:30:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:30:41,338 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:41,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:41,360 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-03-20 18:30:41,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 18:30:41,360 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-03-20 18:30:41,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:41,361 INFO L225 Difference]: With dead ends: 29 [2022-03-20 18:30:41,361 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 18:30:41,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-03-20 18:30:41,362 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:41,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 56 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-03-20 18:30:41,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 18:30:41,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-03-20 18:30:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:41,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-03-20 18:30:41,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-03-20 18:30:41,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:41,365 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-03-20 18:30:41,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:41,365 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-03-20 18:30:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 18:30:41,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:41,366 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:41,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:41,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:41,572 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:41,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:41,572 INFO L85 PathProgramCache]: Analyzing trace with hash 943107627, now seen corresponding path program 5 times [2022-03-20 18:30:41,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:41,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145876825] [2022-03-20 18:30:41,706 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:41,706 INFO L85 PathProgramCache]: Analyzing trace with hash 799072369, now seen corresponding path program 1 times [2022-03-20 18:30:41,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:41,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550846026] [2022-03-20 18:30:41,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:41,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:41,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:41,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372809981] [2022-03-20 18:30:41,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:41,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:41,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:41,731 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:41,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 18:30:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:41,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:41,789 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:41,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:41,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550846026] [2022-03-20 18:30:41,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:41,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372809981] [2022-03-20 18:30:41,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372809981] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:41,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:41,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:41,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:41,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145876825] [2022-03-20 18:30:41,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145876825] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:41,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:41,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 18:30:41,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537807004] [2022-03-20 18:30:41,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:41,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 18:30:41,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:41,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 18:30:41,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:30:41,956 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:41,978 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2022-03-20 18:30:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 18:30:41,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-20 18:30:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:41,979 INFO L225 Difference]: With dead ends: 31 [2022-03-20 18:30:41,979 INFO L226 Difference]: Without dead ends: 26 [2022-03-20 18:30:41,980 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-03-20 18:30:41,980 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 11 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:41,980 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 49 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-03-20 18:30:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-20 18:30:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-03-20 18:30:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-03-20 18:30:41,983 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-03-20 18:30:41,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:41,983 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-03-20 18:30:41,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:41,983 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-03-20 18:30:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 18:30:41,984 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:41,984 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:42,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:42,184 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:42,185 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1190325577, now seen corresponding path program 6 times [2022-03-20 18:30:42,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:42,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1202202307] [2022-03-20 18:30:42,293 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:42,294 INFO L85 PathProgramCache]: Analyzing trace with hash 858177713, now seen corresponding path program 1 times [2022-03-20 18:30:42,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:42,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890545071] [2022-03-20 18:30:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:42,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:42,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:42,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1663916117] [2022-03-20 18:30:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:42,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:42,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:42,301 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:42,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 18:30:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:42,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:42,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:42,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890545071] [2022-03-20 18:30:42,355 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663916117] [2022-03-20 18:30:42,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663916117] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:42,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:42,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:42,518 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:42,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1202202307] [2022-03-20 18:30:42,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1202202307] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:42,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:42,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 18:30:42,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223942233] [2022-03-20 18:30:42,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:42,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 18:30:42,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 18:30:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:30:42,520 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:42,548 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2022-03-20 18:30:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 18:30:42,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-20 18:30:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:42,549 INFO L225 Difference]: With dead ends: 33 [2022-03-20 18:30:42,549 INFO L226 Difference]: Without dead ends: 28 [2022-03-20 18:30:42,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-03-20 18:30:42,550 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:42,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 29 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 33 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-03-20 18:30:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-20 18:30:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-03-20 18:30:42,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:42,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-03-20 18:30:42,553 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-03-20 18:30:42,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:42,553 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-03-20 18:30:42,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:42,553 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-03-20 18:30:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 18:30:42,554 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:42,554 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:42,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:42,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:42,771 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1751393049, now seen corresponding path program 7 times [2022-03-20 18:30:42,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:42,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063659393] [2022-03-20 18:30:42,875 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:42,876 INFO L85 PathProgramCache]: Analyzing trace with hash 917283057, now seen corresponding path program 1 times [2022-03-20 18:30:42,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:42,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549251475] [2022-03-20 18:30:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:42,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:42,881 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:42,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221565065] [2022-03-20 18:30:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:42,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:42,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:42,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:42,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 18:30:42,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:42,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:42,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:42,942 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:42,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549251475] [2022-03-20 18:30:42,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:42,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221565065] [2022-03-20 18:30:42,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221565065] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:42,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:42,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:43,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:43,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063659393] [2022-03-20 18:30:43,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063659393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:43,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:43,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 18:30:43,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916143609] [2022-03-20 18:30:43,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:43,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 18:30:43,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:43,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 18:30:43,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:30:43,128 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:43,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:43,155 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2022-03-20 18:30:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 18:30:43,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-03-20 18:30:43,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:43,157 INFO L225 Difference]: With dead ends: 35 [2022-03-20 18:30:43,157 INFO L226 Difference]: Without dead ends: 30 [2022-03-20 18:30:43,157 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-03-20 18:30:43,157 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:43,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-03-20 18:30:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-20 18:30:43,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-03-20 18:30:43,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-20 18:30:43,160 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-03-20 18:30:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:43,161 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-20 18:30:43,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:43,161 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-20 18:30:43,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 18:30:43,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:43,161 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:43,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-20 18:30:43,377 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,SelfDestructingSolverStorable7 [2022-03-20 18:30:43,378 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:43,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:43,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1640455429, now seen corresponding path program 8 times [2022-03-20 18:30:43,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:43,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [845629829] [2022-03-20 18:30:43,530 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash 976388401, now seen corresponding path program 1 times [2022-03-20 18:30:43,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:43,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888604697] [2022-03-20 18:30:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:43,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:43,536 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:43,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684809432] [2022-03-20 18:30:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:43,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:43,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:43,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 18:30:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:43,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:43,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:43,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:43,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:43,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888604697] [2022-03-20 18:30:43,589 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:43,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684809432] [2022-03-20 18:30:43,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684809432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:43,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:43,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:43,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:43,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [845629829] [2022-03-20 18:30:43,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [845629829] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:43,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:43,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 18:30:43,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242516277] [2022-03-20 18:30:43,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:43,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 18:30:43,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:43,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 18:30:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:30:43,870 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 22 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:43,907 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2022-03-20 18:30:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 18:30:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-20 18:30:43,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:43,908 INFO L225 Difference]: With dead ends: 37 [2022-03-20 18:30:43,908 INFO L226 Difference]: Without dead ends: 32 [2022-03-20 18:30:43,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2022-03-20 18:30:43,909 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:43,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 76 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 31 Unchecked, 0.0s Time] [2022-03-20 18:30:43,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-20 18:30:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-03-20 18:30:43,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:43,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 18:30:43,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-03-20 18:30:43,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:43,912 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 18:30:43,912 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:43,912 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 18:30:43,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 18:30:43,913 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:43,913 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:43,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:44,132 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:44,132 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1326665123, now seen corresponding path program 9 times [2022-03-20 18:30:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:44,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [543608532] [2022-03-20 18:30:44,277 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1035493745, now seen corresponding path program 1 times [2022-03-20 18:30:44,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:44,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704712116] [2022-03-20 18:30:44,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:44,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:44,283 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:44,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1403731396] [2022-03-20 18:30:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:44,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:44,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:44,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:44,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 18:30:44,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:44,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:44,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:44,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:44,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704712116] [2022-03-20 18:30:44,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403731396] [2022-03-20 18:30:44,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403731396] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:44,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:44,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:44,588 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [543608532] [2022-03-20 18:30:44,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [543608532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:44,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:44,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 18:30:44,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925065159] [2022-03-20 18:30:44,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:44,589 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 18:30:44,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:44,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 18:30:44,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:30:44,590 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 24 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:44,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:44,629 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-03-20 18:30:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 18:30:44,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-03-20 18:30:44,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:44,630 INFO L225 Difference]: With dead ends: 39 [2022-03-20 18:30:44,630 INFO L226 Difference]: Without dead ends: 34 [2022-03-20 18:30:44,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2022-03-20 18:30:44,630 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:44,631 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-03-20 18:30:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-20 18:30:44,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-03-20 18:30:44,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:44,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-03-20 18:30:44,633 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-03-20 18:30:44,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:44,634 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-03-20 18:30:44,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:44,634 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-03-20 18:30:44,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 18:30:44,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:44,634 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:44,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:44,839 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,SelfDestructingSolverStorable9 [2022-03-20 18:30:44,839 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:44,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash 421891777, now seen corresponding path program 10 times [2022-03-20 18:30:44,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:44,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1337694334] [2022-03-20 18:30:44,955 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:44,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1094599089, now seen corresponding path program 1 times [2022-03-20 18:30:44,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:44,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579448926] [2022-03-20 18:30:44,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:44,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:44,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:44,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1877646599] [2022-03-20 18:30:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:44,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:44,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:44,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:44,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 18:30:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:44,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:44,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:45,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:45,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:45,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579448926] [2022-03-20 18:30:45,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:45,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877646599] [2022-03-20 18:30:45,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877646599] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:45,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:45,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:45,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:45,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1337694334] [2022-03-20 18:30:45,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1337694334] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:45,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:45,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 18:30:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555966721] [2022-03-20 18:30:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:45,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 18:30:45,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 18:30:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:30:45,298 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:45,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:45,332 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2022-03-20 18:30:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 18:30:45,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-03-20 18:30:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:45,333 INFO L225 Difference]: With dead ends: 41 [2022-03-20 18:30:45,333 INFO L226 Difference]: Without dead ends: 36 [2022-03-20 18:30:45,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2022-03-20 18:30:45,334 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:45,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 63 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 24 Unchecked, 0.0s Time] [2022-03-20 18:30:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-20 18:30:45,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-03-20 18:30:45,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:45,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-03-20 18:30:45,337 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-03-20 18:30:45,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:45,337 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-03-20 18:30:45,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:45,338 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-03-20 18:30:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 18:30:45,338 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:45,338 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:45,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:45,543 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,SelfDestructingSolverStorable10 [2022-03-20 18:30:45,543 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:45,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:45,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1481899937, now seen corresponding path program 11 times [2022-03-20 18:30:45,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:45,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1978975127] [2022-03-20 18:30:45,638 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1153704433, now seen corresponding path program 1 times [2022-03-20 18:30:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:45,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512489666] [2022-03-20 18:30:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:45,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:45,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432644078] [2022-03-20 18:30:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:45,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:45,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:45,644 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:45,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 18:30:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:45,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:45,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:45,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512489666] [2022-03-20 18:30:45,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:45,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432644078] [2022-03-20 18:30:45,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432644078] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:45,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:45,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:46,038 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:46,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1978975127] [2022-03-20 18:30:46,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1978975127] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:46,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:46,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 18:30:46,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555954741] [2022-03-20 18:30:46,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:46,039 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 18:30:46,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:46,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 18:30:46,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:30:46,040 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 28 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:46,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:46,086 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2022-03-20 18:30:46,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 18:30:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-03-20 18:30:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:46,087 INFO L225 Difference]: With dead ends: 43 [2022-03-20 18:30:46,087 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 18:30:46,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2022-03-20 18:30:46,088 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:46,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 62 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 14 Unchecked, 0.0s Time] [2022-03-20 18:30:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 18:30:46,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-03-20 18:30:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:46,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-03-20 18:30:46,091 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-03-20 18:30:46,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:46,091 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-03-20 18:30:46,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:46,092 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-03-20 18:30:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 18:30:46,092 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:46,092 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:46,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:46,308 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,SelfDestructingSolverStorable11 [2022-03-20 18:30:46,308 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:46,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1369668995, now seen corresponding path program 12 times [2022-03-20 18:30:46,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:46,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1474141723] [2022-03-20 18:30:46,448 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:46,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1212809777, now seen corresponding path program 1 times [2022-03-20 18:30:46,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:46,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425324089] [2022-03-20 18:30:46,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:46,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:46,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:46,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114914636] [2022-03-20 18:30:46,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:46,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:46,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:46,463 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:46,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 18:30:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:46,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:46,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:46,509 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:46,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:46,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425324089] [2022-03-20 18:30:46,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:46,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114914636] [2022-03-20 18:30:46,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114914636] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:46,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:46,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:46,902 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:46,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1474141723] [2022-03-20 18:30:46,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1474141723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:46,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:46,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 18:30:46,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785886926] [2022-03-20 18:30:46,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:46,903 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 18:30:46,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:46,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 18:30:46,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:30:46,903 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 30 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:46,945 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2022-03-20 18:30:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 18:30:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-03-20 18:30:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:46,946 INFO L225 Difference]: With dead ends: 45 [2022-03-20 18:30:46,946 INFO L226 Difference]: Without dead ends: 40 [2022-03-20 18:30:46,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2022-03-20 18:30:46,947 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:46,947 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 42 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-03-20 18:30:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-20 18:30:46,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-03-20 18:30:46,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:46,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-03-20 18:30:46,950 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-03-20 18:30:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:46,950 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-03-20 18:30:46,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-03-20 18:30:46,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 18:30:46,951 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:46,951 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:46,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:47,159 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,SelfDestructingSolverStorable12 [2022-03-20 18:30:47,160 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:47,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:47,161 INFO L85 PathProgramCache]: Analyzing trace with hash -889916133, now seen corresponding path program 13 times [2022-03-20 18:30:47,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:47,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412023577] [2022-03-20 18:30:47,285 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:47,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1271915121, now seen corresponding path program 1 times [2022-03-20 18:30:47,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:47,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336694793] [2022-03-20 18:30:47,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:47,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:47,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:47,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118355808] [2022-03-20 18:30:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:47,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:47,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:47,291 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:47,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 18:30:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:47,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:47,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:47,340 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:47,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:47,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336694793] [2022-03-20 18:30:47,340 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:47,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118355808] [2022-03-20 18:30:47,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118355808] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:47,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:47,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:47,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:47,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412023577] [2022-03-20 18:30:47,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412023577] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:47,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:47,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 18:30:47,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305959579] [2022-03-20 18:30:47,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:47,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 18:30:47,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:47,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 18:30:47,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:30:47,747 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 32 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:47,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:47,786 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2022-03-20 18:30:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 18:30:47,787 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-03-20 18:30:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:47,787 INFO L225 Difference]: With dead ends: 47 [2022-03-20 18:30:47,787 INFO L226 Difference]: Without dead ends: 42 [2022-03-20 18:30:47,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2022-03-20 18:30:47,788 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:47,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 42 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 16 Unchecked, 0.0s Time] [2022-03-20 18:30:47,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-20 18:30:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-03-20 18:30:47,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-03-20 18:30:47,791 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-03-20 18:30:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:47,791 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-03-20 18:30:47,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:47,791 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-03-20 18:30:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 18:30:47,792 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:47,792 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:47,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:47,995 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:47,995 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:47,996 INFO L85 PathProgramCache]: Analyzing trace with hash 591083577, now seen corresponding path program 14 times [2022-03-20 18:30:47,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:47,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [111402058] [2022-03-20 18:30:48,126 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1331020465, now seen corresponding path program 1 times [2022-03-20 18:30:48,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:48,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567476316] [2022-03-20 18:30:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:48,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:48,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:48,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1822040161] [2022-03-20 18:30:48,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:48,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:48,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:48,133 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:48,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 18:30:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:48,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:48,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:48,181 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:48,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:48,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567476316] [2022-03-20 18:30:48,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:48,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822040161] [2022-03-20 18:30:48,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822040161] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:48,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:48,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:48,622 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:48,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [111402058] [2022-03-20 18:30:48,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [111402058] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:48,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:48,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 18:30:48,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682369848] [2022-03-20 18:30:48,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:48,623 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 18:30:48,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:48,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 18:30:48,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:30:48,624 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 34 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:48,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:48,682 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-03-20 18:30:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 18:30:48,687 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-20 18:30:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:48,687 INFO L225 Difference]: With dead ends: 49 [2022-03-20 18:30:48,687 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 18:30:48,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 18:30:48,688 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:48,688 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-03-20 18:30:48,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 18:30:48,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-03-20 18:30:48,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-03-20 18:30:48,692 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-03-20 18:30:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:48,692 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-03-20 18:30:48,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-03-20 18:30:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 18:30:48,692 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:48,693 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:48,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 18:30:48,900 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,SelfDestructingSolverStorable14 [2022-03-20 18:30:48,900 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash -2097337385, now seen corresponding path program 15 times [2022-03-20 18:30:48,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:48,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [59896695] [2022-03-20 18:30:49,021 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1390125809, now seen corresponding path program 1 times [2022-03-20 18:30:49,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:49,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779378874] [2022-03-20 18:30:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:49,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:49,025 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:49,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [339468906] [2022-03-20 18:30:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:49,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:49,027 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:49,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 18:30:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:49,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:49,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:49,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:49,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779378874] [2022-03-20 18:30:49,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:49,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339468906] [2022-03-20 18:30:49,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339468906] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:49,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:49,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:49,614 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:49,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [59896695] [2022-03-20 18:30:49,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [59896695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:49,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:49,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 18:30:49,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347900090] [2022-03-20 18:30:49,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:49,614 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 18:30:49,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:49,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 18:30:49,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=843, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:30:49,615 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 36 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:49,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:49,677 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2022-03-20 18:30:49,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 18:30:49,678 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-20 18:30:49,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:49,678 INFO L225 Difference]: With dead ends: 51 [2022-03-20 18:30:49,678 INFO L226 Difference]: Without dead ends: 46 [2022-03-20 18:30:49,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=417, Invalid=843, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 18:30:49,679 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:49,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-03-20 18:30:49,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-20 18:30:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-03-20 18:30:49,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:49,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-03-20 18:30:49,687 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-03-20 18:30:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:49,687 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-03-20 18:30:49,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:49,687 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-03-20 18:30:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 18:30:49,688 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:49,688 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:49,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:49,901 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,SelfDestructingSolverStorable15 [2022-03-20 18:30:49,901 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:49,902 INFO L85 PathProgramCache]: Analyzing trace with hash -99569675, now seen corresponding path program 16 times [2022-03-20 18:30:49,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:49,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1379980634] [2022-03-20 18:30:50,046 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:50,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1449231153, now seen corresponding path program 1 times [2022-03-20 18:30:50,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:50,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326455872] [2022-03-20 18:30:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:50,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:50,054 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:50,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1775301947] [2022-03-20 18:30:50,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:50,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:50,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:50,055 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:50,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 18:30:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:50,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:50,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:50,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:50,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:50,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:50,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326455872] [2022-03-20 18:30:50,107 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:50,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775301947] [2022-03-20 18:30:50,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775301947] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:50,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:50,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:50,710 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:50,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1379980634] [2022-03-20 18:30:50,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1379980634] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:50,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:50,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 18:30:50,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494342613] [2022-03-20 18:30:50,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:50,711 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 18:30:50,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:50,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 18:30:50,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:30:50,712 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 38 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:50,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:50,763 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2022-03-20 18:30:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 18:30:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-03-20 18:30:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:50,764 INFO L225 Difference]: With dead ends: 53 [2022-03-20 18:30:50,764 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 18:30:50,765 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 18:30:50,765 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:50,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 84 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2022-03-20 18:30:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 18:30:50,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-03-20 18:30:50,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:50,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-03-20 18:30:50,768 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-03-20 18:30:50,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:50,769 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-03-20 18:30:50,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-03-20 18:30:50,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 18:30:50,769 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:50,769 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:50,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:50,979 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,SelfDestructingSolverStorable16 [2022-03-20 18:30:50,979 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:50,980 INFO L85 PathProgramCache]: Analyzing trace with hash -95181677, now seen corresponding path program 17 times [2022-03-20 18:30:50,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:50,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1841100868] [2022-03-20 18:30:51,076 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:51,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1508336497, now seen corresponding path program 1 times [2022-03-20 18:30:51,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:51,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663572471] [2022-03-20 18:30:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:51,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:51,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:51,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543551295] [2022-03-20 18:30:51,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:51,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:51,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:51,081 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:51,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 18:30:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:51,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:51,127 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:51,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663572471] [2022-03-20 18:30:51,127 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:51,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543551295] [2022-03-20 18:30:51,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543551295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:51,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:51,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:51,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:51,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1841100868] [2022-03-20 18:30:51,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1841100868] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:51,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:51,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 18:30:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085465610] [2022-03-20 18:30:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:51,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 18:30:51,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 18:30:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=1038, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:30:51,838 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 40 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:51,889 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2022-03-20 18:30:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 18:30:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-20 18:30:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:51,890 INFO L225 Difference]: With dead ends: 55 [2022-03-20 18:30:51,890 INFO L226 Difference]: Without dead ends: 50 [2022-03-20 18:30:51,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=1038, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 18:30:51,891 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:51,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 56 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-03-20 18:30:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-20 18:30:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-03-20 18:30:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-03-20 18:30:51,894 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-03-20 18:30:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:51,894 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-03-20 18:30:51,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-03-20 18:30:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 18:30:51,895 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:51,895 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:51,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:52,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 18:30:52,095 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:52,096 INFO L85 PathProgramCache]: Analyzing trace with hash -173282895, now seen corresponding path program 18 times [2022-03-20 18:30:52,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:52,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109399877] [2022-03-20 18:30:52,194 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:52,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1567441841, now seen corresponding path program 1 times [2022-03-20 18:30:52,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:52,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917086678] [2022-03-20 18:30:52,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:52,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:52,199 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:52,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062138909] [2022-03-20 18:30:52,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:52,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:52,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:52,200 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:52,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 18:30:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:52,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:52,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:52,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:52,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917086678] [2022-03-20 18:30:52,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:52,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062138909] [2022-03-20 18:30:52,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062138909] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:52,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:52,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:53,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:53,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109399877] [2022-03-20 18:30:53,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109399877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:53,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:53,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 18:30:53,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740675010] [2022-03-20 18:30:53,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:53,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 18:30:53,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:53,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 18:30:53,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1143, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:30:53,003 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 42 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:53,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:53,061 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2022-03-20 18:30:53,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 18:30:53,062 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-20 18:30:53,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:53,062 INFO L225 Difference]: With dead ends: 57 [2022-03-20 18:30:53,062 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 18:30:53,063 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=579, Invalid=1143, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 18:30:53,063 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:53,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 62 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 23 Unchecked, 0.0s Time] [2022-03-20 18:30:53,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 18:30:53,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-20 18:30:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-20 18:30:53,066 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-03-20 18:30:53,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:53,067 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-20 18:30:53,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:53,067 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-20 18:30:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 18:30:53,067 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:53,067 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:53,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:53,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:53,283 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:53,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2080857935, now seen corresponding path program 19 times [2022-03-20 18:30:53,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:53,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [312637619] [2022-03-20 18:30:53,406 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:53,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1626547185, now seen corresponding path program 1 times [2022-03-20 18:30:53,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:53,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426506077] [2022-03-20 18:30:53,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:53,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:53,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:53,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1088733894] [2022-03-20 18:30:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:53,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:53,412 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:53,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 18:30:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:53,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:53,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:53,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426506077] [2022-03-20 18:30:53,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:53,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088733894] [2022-03-20 18:30:53,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088733894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:53,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:53,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:54,344 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:54,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [312637619] [2022-03-20 18:30:54,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [312637619] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:54,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:54,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 18:30:54,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270326429] [2022-03-20 18:30:54,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:54,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 18:30:54,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:54,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 18:30:54,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1253, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:30:54,347 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 44 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:54,418 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-03-20 18:30:54,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 18:30:54,419 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-03-20 18:30:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:54,419 INFO L225 Difference]: With dead ends: 59 [2022-03-20 18:30:54,419 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 18:30:54,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=639, Invalid=1253, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 18:30:54,421 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 55 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:54,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 49 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-03-20 18:30:54,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 18:30:54,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-03-20 18:30:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-03-20 18:30:54,426 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-03-20 18:30:54,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:54,426 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-03-20 18:30:54,426 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:54,426 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-03-20 18:30:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 18:30:54,427 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:54,427 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:54,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 18:30:54,631 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:54,631 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash -648288915, now seen corresponding path program 20 times [2022-03-20 18:30:54,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:54,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [25828155] [2022-03-20 18:30:54,768 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:54,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1685652529, now seen corresponding path program 1 times [2022-03-20 18:30:54,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:54,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118512889] [2022-03-20 18:30:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:54,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:54,771 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:54,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142861091] [2022-03-20 18:30:54,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:54,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:54,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:54,773 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:54,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 18:30:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:54,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:54,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:54,816 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:54,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:54,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118512889] [2022-03-20 18:30:54,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:54,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142861091] [2022-03-20 18:30:54,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142861091] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:54,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:54,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:55,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:55,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [25828155] [2022-03-20 18:30:55,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [25828155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:55,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:55,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 18:30:55,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146520896] [2022-03-20 18:30:55,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:55,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 18:30:55,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:55,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 18:30:55,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1368, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:30:55,778 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 46 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:55,846 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2022-03-20 18:30:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 18:30:55,847 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-03-20 18:30:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:55,847 INFO L225 Difference]: With dead ends: 61 [2022-03-20 18:30:55,847 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 18:30:55,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=702, Invalid=1368, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 18:30:55,848 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 49 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:55,848 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-03-20 18:30:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 18:30:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 18:30:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:55,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-03-20 18:30:55,866 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-03-20 18:30:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:55,867 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-03-20 18:30:55,867 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-03-20 18:30:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 18:30:55,867 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:55,867 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:55,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 18:30:56,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:56,068 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:56,068 INFO L85 PathProgramCache]: Analyzing trace with hash 866606091, now seen corresponding path program 21 times [2022-03-20 18:30:56,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:56,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [61486457] [2022-03-20 18:30:56,192 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1744757873, now seen corresponding path program 1 times [2022-03-20 18:30:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:56,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997841375] [2022-03-20 18:30:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:56,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:56,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:56,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968389834] [2022-03-20 18:30:56,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:56,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:56,198 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:56,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 18:30:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:56,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:56,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:56,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:56,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997841375] [2022-03-20 18:30:56,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:56,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968389834] [2022-03-20 18:30:56,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968389834] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:56,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:56,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:57,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:57,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [61486457] [2022-03-20 18:30:57,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [61486457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:57,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:57,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 18:30:57,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061494827] [2022-03-20 18:30:57,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:57,282 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 18:30:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:57,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 18:30:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:30:57,283 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 48 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:57,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:57,352 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2022-03-20 18:30:57,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 18:30:57,352 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-03-20 18:30:57,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:57,353 INFO L225 Difference]: With dead ends: 63 [2022-03-20 18:30:57,353 INFO L226 Difference]: Without dead ends: 58 [2022-03-20 18:30:57,353 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 18:30:57,354 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:57,354 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 55 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-03-20 18:30:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-20 18:30:57,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-03-20 18:30:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-03-20 18:30:57,356 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-03-20 18:30:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:57,357 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-03-20 18:30:57,357 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-03-20 18:30:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 18:30:57,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:57,357 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:57,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:57,573 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:57,573 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:57,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:57,573 INFO L85 PathProgramCache]: Analyzing trace with hash 686793513, now seen corresponding path program 22 times [2022-03-20 18:30:57,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:57,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1728027418] [2022-03-20 18:30:57,670 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1803863217, now seen corresponding path program 1 times [2022-03-20 18:30:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:57,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605245588] [2022-03-20 18:30:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:57,682 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:57,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [81623737] [2022-03-20 18:30:57,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:57,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:57,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:57,684 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:57,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 18:30:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:57,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:57,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:57,745 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:57,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:57,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605245588] [2022-03-20 18:30:57,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:57,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81623737] [2022-03-20 18:30:57,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81623737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:57,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:57,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:30:58,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:30:58,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1728027418] [2022-03-20 18:30:58,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1728027418] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:58,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:58,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 18:30:58,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200031104] [2022-03-20 18:30:58,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:30:58,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 18:30:58,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:58,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 18:30:58,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=1613, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:30:58,989 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:59,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:30:59,072 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2022-03-20 18:30:59,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 18:30:59,072 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-03-20 18:30:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:30:59,073 INFO L225 Difference]: With dead ends: 65 [2022-03-20 18:30:59,073 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 18:30:59,073 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=837, Invalid=1613, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 18:30:59,074 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:30:59,074 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 50 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-03-20 18:30:59,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 18:30:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 18:30:59,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-03-20 18:30:59,077 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-03-20 18:30:59,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:30:59,077 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-03-20 18:30:59,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:30:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-03-20 18:30:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 18:30:59,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:30:59,077 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:30:59,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 18:30:59,286 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:59,287 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:30:59,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:30:59,287 INFO L85 PathProgramCache]: Analyzing trace with hash -314402105, now seen corresponding path program 23 times [2022-03-20 18:30:59,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:30:59,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1122852697] [2022-03-20 18:30:59,407 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:30:59,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1862968561, now seen corresponding path program 1 times [2022-03-20 18:30:59,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:30:59,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434873585] [2022-03-20 18:30:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:59,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:30:59,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:30:59,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475268945] [2022-03-20 18:30:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:30:59,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:30:59,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:30:59,412 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:30:59,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 18:30:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:30:59,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:30:59,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:30:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:30:59,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:30:59,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:30:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434873585] [2022-03-20 18:30:59,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:30:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475268945] [2022-03-20 18:30:59,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475268945] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:30:59,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:30:59,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:00,801 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:00,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1122852697] [2022-03-20 18:31:00,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1122852697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:00,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:00,801 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 18:31:00,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658326416] [2022-03-20 18:31:00,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:00,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 18:31:00,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:00,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 18:31:00,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=909, Invalid=1743, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:31:00,803 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 52 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:00,901 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2022-03-20 18:31:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 18:31:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-03-20 18:31:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:00,901 INFO L225 Difference]: With dead ends: 67 [2022-03-20 18:31:00,902 INFO L226 Difference]: Without dead ends: 62 [2022-03-20 18:31:00,902 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=909, Invalid=1743, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 18:31:00,902 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 69 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:00,903 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 63 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 79 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-03-20 18:31:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-20 18:31:00,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-03-20 18:31:00,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-03-20 18:31:00,905 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-03-20 18:31:00,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:00,905 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-03-20 18:31:00,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:00,905 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-03-20 18:31:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 18:31:00,906 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:00,906 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:00,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 18:31:01,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:01,107 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:01,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:01,108 INFO L85 PathProgramCache]: Analyzing trace with hash -390716699, now seen corresponding path program 24 times [2022-03-20 18:31:01,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:01,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114004219] [2022-03-20 18:31:01,232 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:01,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1922073905, now seen corresponding path program 1 times [2022-03-20 18:31:01,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:01,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115050025] [2022-03-20 18:31:01,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:01,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:01,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:01,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664400853] [2022-03-20 18:31:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:01,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:01,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:01,238 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:01,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 18:31:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:01,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:01,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:01,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:01,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115050025] [2022-03-20 18:31:01,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664400853] [2022-03-20 18:31:01,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664400853] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:01,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:01,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:02,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:02,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114004219] [2022-03-20 18:31:02,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114004219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:02,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:02,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 18:31:02,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829189314] [2022-03-20 18:31:02,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:02,820 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 18:31:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 18:31:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=984, Invalid=1878, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:31:02,822 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:02,922 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2022-03-20 18:31:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 18:31:02,922 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-03-20 18:31:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:02,923 INFO L225 Difference]: With dead ends: 69 [2022-03-20 18:31:02,923 INFO L226 Difference]: Without dead ends: 64 [2022-03-20 18:31:02,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=984, Invalid=1878, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 18:31:02,924 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:02,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 62 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 81 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-20 18:31:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-20 18:31:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-03-20 18:31:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:02,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-03-20 18:31:02,927 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-03-20 18:31:02,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:02,927 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-03-20 18:31:02,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-03-20 18:31:02,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 18:31:02,928 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:02,928 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:02,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 18:31:03,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 18:31:03,144 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:03,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:03,144 INFO L85 PathProgramCache]: Analyzing trace with hash -714597501, now seen corresponding path program 25 times [2022-03-20 18:31:03,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:03,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [745512375] [2022-03-20 18:31:03,276 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:03,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1981179249, now seen corresponding path program 1 times [2022-03-20 18:31:03,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:03,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860448375] [2022-03-20 18:31:03,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:03,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:03,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:03,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [771607301] [2022-03-20 18:31:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:03,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:03,280 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:03,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 18:31:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:03,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:03,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:03,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860448375] [2022-03-20 18:31:03,328 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:03,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771607301] [2022-03-20 18:31:03,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771607301] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:03,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:03,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:04,981 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:04,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [745512375] [2022-03-20 18:31:04,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [745512375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:04,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:04,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 18:31:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753585553] [2022-03-20 18:31:04,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:04,982 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 18:31:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 18:31:04,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1062, Invalid=2018, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:31:04,983 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 56 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:05,094 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2022-03-20 18:31:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 18:31:05,095 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-03-20 18:31:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:05,095 INFO L225 Difference]: With dead ends: 71 [2022-03-20 18:31:05,095 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 18:31:05,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1062, Invalid=2018, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 18:31:05,097 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:05,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 43 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-03-20 18:31:05,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 18:31:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-03-20 18:31:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-03-20 18:31:05,100 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-03-20 18:31:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:05,100 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-03-20 18:31:05,100 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:05,100 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-03-20 18:31:05,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 18:31:05,100 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:05,100 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:05,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-20 18:31:05,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 18:31:05,301 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:05,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1568564385, now seen corresponding path program 26 times [2022-03-20 18:31:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:05,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683932079] [2022-03-20 18:31:05,426 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:05,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2040284593, now seen corresponding path program 1 times [2022-03-20 18:31:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:05,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749501121] [2022-03-20 18:31:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:05,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:05,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:05,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [919937281] [2022-03-20 18:31:05,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:05,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:05,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:05,431 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:05,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 18:31:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:05,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:05,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:05,474 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:05,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:05,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749501121] [2022-03-20 18:31:05,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:05,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919937281] [2022-03-20 18:31:05,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919937281] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:05,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:05,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:07,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:07,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683932079] [2022-03-20 18:31:07,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683932079] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:07,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:07,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 18:31:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937239795] [2022-03-20 18:31:07,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:07,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 18:31:07,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 18:31:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=2163, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:31:07,384 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 58 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:07,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:07,489 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2022-03-20 18:31:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 18:31:07,489 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-03-20 18:31:07,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:07,490 INFO L225 Difference]: With dead ends: 73 [2022-03-20 18:31:07,490 INFO L226 Difference]: Without dead ends: 68 [2022-03-20 18:31:07,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1143, Invalid=2163, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 18:31:07,491 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:07,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 77 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-03-20 18:31:07,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-20 18:31:07,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-03-20 18:31:07,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:07,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-03-20 18:31:07,493 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-03-20 18:31:07,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:07,493 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-03-20 18:31:07,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:07,494 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-03-20 18:31:07,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 18:31:07,494 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:07,494 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:07,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:07,696 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 18:31:07,697 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:07,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:07,697 INFO L85 PathProgramCache]: Analyzing trace with hash 958848575, now seen corresponding path program 27 times [2022-03-20 18:31:07,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:07,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613566114] [2022-03-20 18:31:07,822 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:07,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2099389937, now seen corresponding path program 1 times [2022-03-20 18:31:07,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:07,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504017131] [2022-03-20 18:31:07,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:07,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:07,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:07,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503601850] [2022-03-20 18:31:07,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:07,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:07,827 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:07,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 18:31:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:07,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:07,870 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:07,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:07,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504017131] [2022-03-20 18:31:07,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:07,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503601850] [2022-03-20 18:31:07,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503601850] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:07,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:07,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:10,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:10,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1613566114] [2022-03-20 18:31:10,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1613566114] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:10,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:10,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 18:31:10,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497085387] [2022-03-20 18:31:10,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:10,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 18:31:10,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:10,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 18:31:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=2313, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:31:10,059 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 60 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:10,156 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2022-03-20 18:31:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 18:31:10,156 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-03-20 18:31:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:10,157 INFO L225 Difference]: With dead ends: 75 [2022-03-20 18:31:10,157 INFO L226 Difference]: Without dead ends: 70 [2022-03-20 18:31:10,158 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1671 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1227, Invalid=2313, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 18:31:10,158 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:10,158 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 49 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-20 18:31:10,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-20 18:31:10,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-03-20 18:31:10,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:10,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-03-20 18:31:10,161 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-03-20 18:31:10,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:10,161 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-03-20 18:31:10,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:10,161 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-03-20 18:31:10,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 18:31:10,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:10,161 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:10,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 18:31:10,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 18:31:10,379 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash -862492579, now seen corresponding path program 28 times [2022-03-20 18:31:10,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:10,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [858956082] [2022-03-20 18:31:10,479 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2136472015, now seen corresponding path program 1 times [2022-03-20 18:31:10,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:10,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215567746] [2022-03-20 18:31:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:10,483 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:10,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896952395] [2022-03-20 18:31:10,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:10,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:10,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:10,487 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:10,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 18:31:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:10,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:10,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:10,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:10,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215567746] [2022-03-20 18:31:10,531 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:10,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896952395] [2022-03-20 18:31:10,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896952395] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:10,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:10,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:12,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:12,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [858956082] [2022-03-20 18:31:12,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [858956082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:12,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:12,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 18:31:12,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439076619] [2022-03-20 18:31:12,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:12,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 18:31:12,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:12,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 18:31:12,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1314, Invalid=2468, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:31:12,982 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 62 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:13,089 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2022-03-20 18:31:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 18:31:13,089 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-03-20 18:31:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:13,090 INFO L225 Difference]: With dead ends: 77 [2022-03-20 18:31:13,090 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 18:31:13,090 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1314, Invalid=2468, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 18:31:13,091 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:13,091 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 43 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 18 Unchecked, 0.1s Time] [2022-03-20 18:31:13,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 18:31:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 18:31:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-03-20 18:31:13,094 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-03-20 18:31:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:13,094 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-03-20 18:31:13,094 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-03-20 18:31:13,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 18:31:13,094 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:13,094 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:13,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:13,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 18:31:13,308 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:13,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:13,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1175315195, now seen corresponding path program 29 times [2022-03-20 18:31:13,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:13,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [321143454] [2022-03-20 18:31:13,408 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash -2077366671, now seen corresponding path program 1 times [2022-03-20 18:31:13,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:13,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316519393] [2022-03-20 18:31:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:13,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:13,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:13,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72757532] [2022-03-20 18:31:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:13,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:13,412 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:13,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 18:31:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:13,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:13,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:13,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:13,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:13,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316519393] [2022-03-20 18:31:13,456 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:13,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72757532] [2022-03-20 18:31:13,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72757532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:13,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:13,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:16,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:16,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [321143454] [2022-03-20 18:31:16,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [321143454] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:16,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:16,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 18:31:16,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859407069] [2022-03-20 18:31:16,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:16,247 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 18:31:16,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:16,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 18:31:16,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1404, Invalid=2628, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:31:16,248 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 64 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:16,367 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2022-03-20 18:31:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 18:31:16,367 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-03-20 18:31:16,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:16,368 INFO L225 Difference]: With dead ends: 79 [2022-03-20 18:31:16,368 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 18:31:16,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1911 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1404, Invalid=2628, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 18:31:16,369 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 121 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:16,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 55 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 91 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-03-20 18:31:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 18:31:16,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-03-20 18:31:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-03-20 18:31:16,372 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-03-20 18:31:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:16,372 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-03-20 18:31:16,372 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:16,372 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-03-20 18:31:16,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 18:31:16,372 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:16,372 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:16,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:16,588 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:16,588 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:16,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:16,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1003499033, now seen corresponding path program 30 times [2022-03-20 18:31:16,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:16,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [756008318] [2022-03-20 18:31:16,716 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:16,717 INFO L85 PathProgramCache]: Analyzing trace with hash -2018261327, now seen corresponding path program 1 times [2022-03-20 18:31:16,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:16,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608335792] [2022-03-20 18:31:16,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:16,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:16,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:16,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740081540] [2022-03-20 18:31:16,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:16,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:16,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:16,721 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:16,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 18:31:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:16,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:16,765 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:16,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:16,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608335792] [2022-03-20 18:31:16,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:16,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740081540] [2022-03-20 18:31:16,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740081540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:16,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:16,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:19,870 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:19,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [756008318] [2022-03-20 18:31:19,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [756008318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:19,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:19,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 18:31:19,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130073755] [2022-03-20 18:31:19,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:19,871 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 18:31:19,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:19,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 18:31:19,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=2793, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:31:19,872 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 66 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:20,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:20,038 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2022-03-20 18:31:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 18:31:20,039 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-03-20 18:31:20,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:20,039 INFO L225 Difference]: With dead ends: 81 [2022-03-20 18:31:20,039 INFO L226 Difference]: Without dead ends: 76 [2022-03-20 18:31:20,040 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2037 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1497, Invalid=2793, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 18:31:20,040 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 128 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:20,040 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 64 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 99 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-03-20 18:31:20,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-20 18:31:20,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-03-20 18:31:20,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:20,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-03-20 18:31:20,043 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-03-20 18:31:20,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:20,043 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-03-20 18:31:20,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-03-20 18:31:20,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 18:31:20,044 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:20,044 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:20,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:20,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:20,244 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:20,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:20,245 INFO L85 PathProgramCache]: Analyzing trace with hash -903075401, now seen corresponding path program 31 times [2022-03-20 18:31:20,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:20,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3256658] [2022-03-20 18:31:20,403 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1959155983, now seen corresponding path program 1 times [2022-03-20 18:31:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:20,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971640676] [2022-03-20 18:31:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:20,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:20,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441396613] [2022-03-20 18:31:20,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:20,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:20,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:20,408 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:20,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 18:31:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:20,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:20,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:20,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:20,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971640676] [2022-03-20 18:31:20,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441396613] [2022-03-20 18:31:20,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441396613] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:20,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:20,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:24,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:24,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3256658] [2022-03-20 18:31:24,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3256658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:24,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:24,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 18:31:24,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340422227] [2022-03-20 18:31:24,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:24,760 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 18:31:24,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 18:31:24,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1593, Invalid=2963, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:31:24,761 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:25,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:25,179 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2022-03-20 18:31:25,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 18:31:25,180 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-03-20 18:31:25,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:25,180 INFO L225 Difference]: With dead ends: 83 [2022-03-20 18:31:25,180 INFO L226 Difference]: Without dead ends: 78 [2022-03-20 18:31:25,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1593, Invalid=2963, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 18:31:25,181 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:25,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 70 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 29 Unchecked, 0.4s Time] [2022-03-20 18:31:25,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-20 18:31:25,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-03-20 18:31:25,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:25,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-03-20 18:31:25,185 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-03-20 18:31:25,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:25,185 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-03-20 18:31:25,185 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:25,185 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-03-20 18:31:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 18:31:25,185 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:25,186 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:25,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:25,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:25,386 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:25,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:25,386 INFO L85 PathProgramCache]: Analyzing trace with hash 829928917, now seen corresponding path program 32 times [2022-03-20 18:31:25,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:25,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1003333785] [2022-03-20 18:31:25,542 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1900050639, now seen corresponding path program 1 times [2022-03-20 18:31:25,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:25,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148579011] [2022-03-20 18:31:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:25,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:25,545 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:25,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063115800] [2022-03-20 18:31:25,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:25,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:25,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:25,547 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:25,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 18:31:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:25,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:25,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148579011] [2022-03-20 18:31:25,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:25,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063115800] [2022-03-20 18:31:25,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063115800] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:25,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:25,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:31,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:31,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1003333785] [2022-03-20 18:31:31,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1003333785] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:31,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:31,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 18:31:31,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30806430] [2022-03-20 18:31:31,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:31,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 18:31:31,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:31,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 18:31:31,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1692, Invalid=3138, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:31:31,459 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 70 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:31,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:31,781 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2022-03-20 18:31:31,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 18:31:31,782 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-03-20 18:31:31,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:31,782 INFO L225 Difference]: With dead ends: 85 [2022-03-20 18:31:31,782 INFO L226 Difference]: Without dead ends: 80 [2022-03-20 18:31:31,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1692, Invalid=3138, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 18:31:31,783 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 111 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:31,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 76 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-03-20 18:31:31,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-20 18:31:31,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-03-20 18:31:31,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:31,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-03-20 18:31:31,786 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-03-20 18:31:31,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:31,786 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-03-20 18:31:31,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:31,787 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-03-20 18:31:31,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 18:31:31,787 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:31,787 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:31,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:32,000 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-20 18:31:32,000 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:32,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:32,001 INFO L85 PathProgramCache]: Analyzing trace with hash -200232333, now seen corresponding path program 33 times [2022-03-20 18:31:32,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:32,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [639777884] [2022-03-20 18:31:32,105 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:32,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1840945295, now seen corresponding path program 1 times [2022-03-20 18:31:32,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:32,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850207979] [2022-03-20 18:31:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:32,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:32,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:32,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [358832045] [2022-03-20 18:31:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:32,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:32,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:32,110 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:32,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 18:31:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:32,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:32,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:32,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:32,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:32,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850207979] [2022-03-20 18:31:32,162 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:32,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358832045] [2022-03-20 18:31:32,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358832045] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:32,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:32,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:37,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:37,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [639777884] [2022-03-20 18:31:37,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [639777884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:37,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:37,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 18:31:37,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952312562] [2022-03-20 18:31:37,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:37,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 18:31:37,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:37,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 18:31:37,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1794, Invalid=3318, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:31:37,852 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:38,250 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2022-03-20 18:31:38,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 18:31:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-03-20 18:31:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:38,251 INFO L225 Difference]: With dead ends: 87 [2022-03-20 18:31:38,251 INFO L226 Difference]: Without dead ends: 82 [2022-03-20 18:31:38,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2439 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1794, Invalid=3318, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 18:31:38,252 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 122 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:38,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 29 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 23 Unchecked, 0.4s Time] [2022-03-20 18:31:38,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-20 18:31:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-03-20 18:31:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-03-20 18:31:38,255 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-03-20 18:31:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:38,256 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-03-20 18:31:38,256 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-03-20 18:31:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 18:31:38,256 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:38,256 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:38,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 18:31:38,461 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:38,461 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:38,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1952251793, now seen corresponding path program 34 times [2022-03-20 18:31:38,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:38,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19057813] [2022-03-20 18:31:38,609 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:38,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1781839951, now seen corresponding path program 1 times [2022-03-20 18:31:38,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:38,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731176990] [2022-03-20 18:31:38,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:38,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:38,615 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:38,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119393055] [2022-03-20 18:31:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:38,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:38,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:38,616 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:38,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 18:31:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:38,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:38,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:38,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:38,665 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:38,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731176990] [2022-03-20 18:31:38,665 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:38,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119393055] [2022-03-20 18:31:38,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119393055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:38,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:38,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:44,759 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19057813] [2022-03-20 18:31:44,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19057813] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:44,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:44,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 18:31:44,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400812922] [2022-03-20 18:31:44,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:44,759 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 18:31:44,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 18:31:44,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1899, Invalid=3503, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:31:44,761 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 74 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:45,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:45,113 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2022-03-20 18:31:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 18:31:45,114 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-03-20 18:31:45,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:45,114 INFO L225 Difference]: With dead ends: 89 [2022-03-20 18:31:45,114 INFO L226 Difference]: Without dead ends: 84 [2022-03-20 18:31:45,115 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2581 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1899, Invalid=3503, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 18:31:45,116 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 129 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:45,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 57 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 107 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-03-20 18:31:45,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-03-20 18:31:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-03-20 18:31:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-03-20 18:31:45,119 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2022-03-20 18:31:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:45,119 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-03-20 18:31:45,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-03-20 18:31:45,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 18:31:45,119 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:45,119 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:45,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:45,335 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 18:31:45,335 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:45,336 INFO L85 PathProgramCache]: Analyzing trace with hash 315260207, now seen corresponding path program 35 times [2022-03-20 18:31:45,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:45,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [934299314] [2022-03-20 18:31:45,478 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1722734607, now seen corresponding path program 1 times [2022-03-20 18:31:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:45,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969071467] [2022-03-20 18:31:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:45,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:45,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:45,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1214467879] [2022-03-20 18:31:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:45,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:45,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:45,483 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:45,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 18:31:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:45,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:45,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:45,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969071467] [2022-03-20 18:31:45,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:45,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214467879] [2022-03-20 18:31:45,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214467879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:45,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:45,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:31:56,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:31:56,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [934299314] [2022-03-20 18:31:56,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [934299314] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:56,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:56,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 18:31:56,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186169387] [2022-03-20 18:31:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:31:56,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 18:31:56,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:56,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 18:31:56,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2007, Invalid=3693, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:31:56,954 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 76 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:31:57,354 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2022-03-20 18:31:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 18:31:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-03-20 18:31:57,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:31:57,355 INFO L225 Difference]: With dead ends: 91 [2022-03-20 18:31:57,356 INFO L226 Difference]: Without dead ends: 86 [2022-03-20 18:31:57,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=2007, Invalid=3693, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 18:31:57,357 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 109 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 18:31:57,357 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 70 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 18 Unchecked, 0.4s Time] [2022-03-20 18:31:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-20 18:31:57,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-03-20 18:31:57,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:57,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-03-20 18:31:57,360 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2022-03-20 18:31:57,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:31:57,360 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-03-20 18:31:57,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:31:57,360 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-03-20 18:31:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 18:31:57,361 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:31:57,361 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:31:57,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 18:31:57,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:57,580 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:31:57,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:31:57,580 INFO L85 PathProgramCache]: Analyzing trace with hash -875623603, now seen corresponding path program 36 times [2022-03-20 18:31:57,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:31:57,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [692668841] [2022-03-20 18:31:57,730 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:31:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1663629263, now seen corresponding path program 1 times [2022-03-20 18:31:57,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:31:57,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251321796] [2022-03-20 18:31:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:31:57,734 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:31:57,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805158783] [2022-03-20 18:31:57,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:31:57,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:31:57,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:31:57,735 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:31:57,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 18:31:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:31:57,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:31:57,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:31:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:31:57,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:31:57,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:31:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251321796] [2022-03-20 18:31:57,781 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:31:57,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805158783] [2022-03-20 18:31:57,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805158783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:31:57,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:31:57,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:32:12,995 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:12,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [692668841] [2022-03-20 18:32:12,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [692668841] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:12,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:12,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 18:32:12,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019934803] [2022-03-20 18:32:12,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:12,996 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 18:32:12,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:12,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 18:32:12,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2118, Invalid=3888, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:32:12,997 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 78 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:13,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:13,297 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-03-20 18:32:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 18:32:13,297 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-03-20 18:32:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:13,298 INFO L225 Difference]: With dead ends: 93 [2022-03-20 18:32:13,298 INFO L226 Difference]: Without dead ends: 88 [2022-03-20 18:32:13,298 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2877 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=2118, Invalid=3888, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 18:32:13,299 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 117 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:13,299 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 76 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 112 Invalid, 0 Unknown, 13 Unchecked, 0.3s Time] [2022-03-20 18:32:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-20 18:32:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-03-20 18:32:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-03-20 18:32:13,302 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2022-03-20 18:32:13,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:13,302 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-03-20 18:32:13,302 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-03-20 18:32:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 18:32:13,302 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:13,302 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:13,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 18:32:13,515 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 18:32:13,515 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:13,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:13,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1441303019, now seen corresponding path program 37 times [2022-03-20 18:32:13,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:13,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1548792705] [2022-03-20 18:32:13,671 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:13,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1604523919, now seen corresponding path program 1 times [2022-03-20 18:32:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:13,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396106745] [2022-03-20 18:32:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:13,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:13,675 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:32:13,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398120455] [2022-03-20 18:32:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:13,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:13,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:13,676 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:32:13,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 18:32:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:32:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:13,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:32:13,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396106745] [2022-03-20 18:32:13,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:32:13,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398120455] [2022-03-20 18:32:13,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398120455] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:13,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:13,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:32:28,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:28,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1548792705] [2022-03-20 18:32:28,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1548792705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:28,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:28,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 18:32:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640378353] [2022-03-20 18:32:28,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:28,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 18:32:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 18:32:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2232, Invalid=4088, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:32:28,906 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 80 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:29,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:29,579 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2022-03-20 18:32:29,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 18:32:29,580 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-03-20 18:32:29,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:29,580 INFO L225 Difference]: With dead ends: 95 [2022-03-20 18:32:29,580 INFO L226 Difference]: Without dead ends: 90 [2022-03-20 18:32:29,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=2232, Invalid=4088, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 18:32:29,581 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 155 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:29,582 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 78 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 15 Unchecked, 0.6s Time] [2022-03-20 18:32:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-20 18:32:29,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-03-20 18:32:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:29,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-03-20 18:32:29,585 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2022-03-20 18:32:29,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:29,585 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-03-20 18:32:29,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:29,585 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-03-20 18:32:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 18:32:29,585 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:29,585 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:29,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 18:32:29,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 18:32:29,799 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:29,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:29,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1080239863, now seen corresponding path program 38 times [2022-03-20 18:32:29,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:29,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1973117866] [2022-03-20 18:32:29,955 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:29,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1545418575, now seen corresponding path program 1 times [2022-03-20 18:32:29,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:29,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945812101] [2022-03-20 18:32:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:29,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:29,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:32:29,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117910222] [2022-03-20 18:32:29,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:29,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:29,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:29,960 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:32:29,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 18:32:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:29,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:32:29,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:30,007 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:32:30,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945812101] [2022-03-20 18:32:30,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:32:30,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117910222] [2022-03-20 18:32:30,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117910222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:30,007 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:30,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:32:54,088 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:32:54,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1973117866] [2022-03-20 18:32:54,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1973117866] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:54,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:54,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 18:32:54,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042622248] [2022-03-20 18:32:54,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:32:54,089 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 18:32:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 18:32:54,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2349, Invalid=4293, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:32:54,091 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 82 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:54,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:32:54,756 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2022-03-20 18:32:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 18:32:54,756 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-03-20 18:32:54,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:32:54,757 INFO L225 Difference]: With dead ends: 97 [2022-03-20 18:32:54,757 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 18:32:54,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3189 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=2349, Invalid=4293, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 18:32:54,758 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 131 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 18:32:54,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 64 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 16 Unchecked, 0.6s Time] [2022-03-20 18:32:54,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 18:32:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-03-20 18:32:54,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-20 18:32:54,761 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2022-03-20 18:32:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:32:54,761 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-20 18:32:54,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:32:54,761 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-20 18:32:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 18:32:54,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:32:54,761 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:32:54,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 18:32:54,977 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 18:32:54,977 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:32:54,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:32:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1921394521, now seen corresponding path program 39 times [2022-03-20 18:32:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:32:54,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [885509867] [2022-03-20 18:32:55,092 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:32:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1486313231, now seen corresponding path program 1 times [2022-03-20 18:32:55,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:32:55,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157878394] [2022-03-20 18:32:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:55,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:32:55,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:32:55,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690794420] [2022-03-20 18:32:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:32:55,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:32:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:32:55,096 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:32:55,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 18:32:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:32:55,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:32:55,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:32:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:32:55,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:32:55,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:32:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157878394] [2022-03-20 18:32:55,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:32:55,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690794420] [2022-03-20 18:32:55,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690794420] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:32:55,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:32:55,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:33:19,219 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:19,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [885509867] [2022-03-20 18:33:19,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [885509867] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:19,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:19,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 18:33:19,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275231987] [2022-03-20 18:33:19,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:19,219 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 18:33:19,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:19,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 18:33:19,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2469, Invalid=4503, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:33:19,221 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 84 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:19,799 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2022-03-20 18:33:19,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 18:33:19,799 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-03-20 18:33:19,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:19,799 INFO L225 Difference]: With dead ends: 99 [2022-03-20 18:33:19,800 INFO L226 Difference]: Without dead ends: 94 [2022-03-20 18:33:19,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3351 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=2469, Invalid=4503, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 18:33:19,800 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 134 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:19,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 55 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 117 Invalid, 0 Unknown, 38 Unchecked, 0.5s Time] [2022-03-20 18:33:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-20 18:33:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-03-20 18:33:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-03-20 18:33:19,804 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2022-03-20 18:33:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:19,804 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-03-20 18:33:19,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:19,804 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-03-20 18:33:19,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 18:33:19,804 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:19,804 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:19,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 18:33:20,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 18:33:20,005 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:20,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1477798085, now seen corresponding path program 40 times [2022-03-20 18:33:20,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:20,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641141890] [2022-03-20 18:33:20,172 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:33:20,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1427207887, now seen corresponding path program 1 times [2022-03-20 18:33:20,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:20,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83181693] [2022-03-20 18:33:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:20,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:20,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:33:20,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325887510] [2022-03-20 18:33:20,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:20,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:20,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:33:20,176 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:33:20,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 18:33:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:20,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:33:20,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:20,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:33:20,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:20,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83181693] [2022-03-20 18:33:20,225 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:33:20,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325887510] [2022-03-20 18:33:20,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325887510] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:20,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:20,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:33:57,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:33:57,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641141890] [2022-03-20 18:33:57,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641141890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:57,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:57,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 18:33:57,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833209828] [2022-03-20 18:33:57,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:33:57,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 18:33:57,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 18:33:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2592, Invalid=4718, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:33:57,715 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 86 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:58,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:33:58,642 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2022-03-20 18:33:58,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 18:33:58,643 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-03-20 18:33:58,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:33:58,643 INFO L225 Difference]: With dead ends: 101 [2022-03-20 18:33:58,643 INFO L226 Difference]: Without dead ends: 96 [2022-03-20 18:33:58,644 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 37.4s TimeCoverageRelationStatistics Valid=2592, Invalid=4718, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 18:33:58,644 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 132 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:33:58,644 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 57 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 22 Unchecked, 0.9s Time] [2022-03-20 18:33:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-20 18:33:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-03-20 18:33:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:58,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-03-20 18:33:58,647 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2022-03-20 18:33:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:33:58,648 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-03-20 18:33:58,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:33:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-03-20 18:33:58,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 18:33:58,648 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:33:58,648 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:33:58,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 18:33:58,863 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:58,864 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:33:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:33:58,864 INFO L85 PathProgramCache]: Analyzing trace with hash -368219805, now seen corresponding path program 41 times [2022-03-20 18:33:58,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:33:58,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504574661] [2022-03-20 18:33:59,045 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:33:59,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1368102543, now seen corresponding path program 1 times [2022-03-20 18:33:59,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:33:59,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563517226] [2022-03-20 18:33:59,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:59,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:33:59,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:33:59,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2123207381] [2022-03-20 18:33:59,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:33:59,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:33:59,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:33:59,050 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:33:59,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 18:33:59,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:33:59,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:33:59,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:33:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:33:59,100 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:33:59,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:33:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563517226] [2022-03-20 18:33:59,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:33:59,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123207381] [2022-03-20 18:33:59,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123207381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:33:59,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:33:59,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:34:51,265 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:34:51,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504574661] [2022-03-20 18:34:51,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504574661] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:51,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:51,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 18:34:51,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73273459] [2022-03-20 18:34:51,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:34:51,266 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 18:34:51,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:51,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 18:34:51,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2718, Invalid=4938, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:34:51,267 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 88 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:52,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:34:52,111 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2022-03-20 18:34:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 18:34:52,112 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-03-20 18:34:52,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:34:52,112 INFO L225 Difference]: With dead ends: 103 [2022-03-20 18:34:52,112 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 18:34:52,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3687 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=2718, Invalid=4938, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 18:34:52,113 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 144 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 18:34:52,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 42 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 119 Invalid, 0 Unknown, 27 Unchecked, 0.8s Time] [2022-03-20 18:34:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 18:34:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-03-20 18:34:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-03-20 18:34:52,117 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2022-03-20 18:34:52,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:34:52,117 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-03-20 18:34:52,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:34:52,117 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-03-20 18:34:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 18:34:52,118 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:34:52,118 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:34:52,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-20 18:34:52,328 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:34:52,328 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:34:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:34:52,329 INFO L85 PathProgramCache]: Analyzing trace with hash -569918847, now seen corresponding path program 42 times [2022-03-20 18:34:52,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:34:52,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1752477614] [2022-03-20 18:34:52,501 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:34:52,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1308997199, now seen corresponding path program 1 times [2022-03-20 18:34:52,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:34:52,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398663192] [2022-03-20 18:34:52,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:52,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:34:52,506 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:34:52,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885899911] [2022-03-20 18:34:52,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:34:52,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:34:52,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:34:52,507 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:34:52,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 18:34:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:34:52,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:34:52,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:34:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:34:52,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:34:52,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:34:52,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398663192] [2022-03-20 18:34:52,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:34:52,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885899911] [2022-03-20 18:34:52,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885899911] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:34:52,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:34:52,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:35:58,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:35:58,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1752477614] [2022-03-20 18:35:58,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1752477614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:35:58,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:35:58,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 18:35:58,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420869495] [2022-03-20 18:35:58,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:35:58,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 18:35:58,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:58,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 18:35:58,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2847, Invalid=5163, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:35:58,648 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 90 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:35:59,600 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2022-03-20 18:35:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 18:35:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-03-20 18:35:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:35:59,601 INFO L225 Difference]: With dead ends: 105 [2022-03-20 18:35:59,601 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 18:35:59,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3861 ImplicationChecksByTransitivity, 66.0s TimeCoverageRelationStatistics Valid=2847, Invalid=5163, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 18:35:59,602 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 191 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 18:35:59,602 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 70 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 128 Invalid, 0 Unknown, 17 Unchecked, 0.9s Time] [2022-03-20 18:35:59,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 18:35:59,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-20 18:35:59,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:59,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-03-20 18:35:59,606 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2022-03-20 18:35:59,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:35:59,606 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-03-20 18:35:59,606 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:35:59,606 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-03-20 18:35:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 18:35:59,606 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:35:59,606 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:35:59,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 18:35:59,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-20 18:35:59,815 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:35:59,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:35:59,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1129169889, now seen corresponding path program 43 times [2022-03-20 18:35:59,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:35:59,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1806814193] [2022-03-20 18:35:59,981 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:35:59,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1249891855, now seen corresponding path program 1 times [2022-03-20 18:35:59,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:35:59,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400953361] [2022-03-20 18:35:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:59,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:35:59,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:35:59,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676022122] [2022-03-20 18:35:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:35:59,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:35:59,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:35:59,986 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:35:59,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 18:36:00,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:36:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:36:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:36:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:36:00,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:36:00,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:36:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400953361] [2022-03-20 18:36:00,037 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:36:00,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676022122] [2022-03-20 18:36:00,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676022122] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:36:00,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:36:00,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:37:16,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:37:16,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1806814193] [2022-03-20 18:37:16,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1806814193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:16,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:16,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 18:37:16,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723610143] [2022-03-20 18:37:16,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:37:16,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 18:37:16,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:16,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 18:37:16,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2979, Invalid=5393, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:37:16,273 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 92 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:37:17,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:37:17,389 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2022-03-20 18:37:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 18:37:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-03-20 18:37:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:37:17,390 INFO L225 Difference]: With dead ends: 107 [2022-03-20 18:37:17,390 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 18:37:17,391 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 76.1s TimeCoverageRelationStatistics Valid=2979, Invalid=5393, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 18:37:17,391 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 124 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:37:17,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 98 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 34 Unchecked, 1.0s Time] [2022-03-20 18:37:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 18:37:17,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-03-20 18:37:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:37:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-03-20 18:37:17,399 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2022-03-20 18:37:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:37:17,399 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-03-20 18:37:17,399 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:37:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-03-20 18:37:17,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 18:37:17,400 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:37:17,400 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:37:17,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 18:37:17,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:17,607 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:37:17,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:37:17,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1698509251, now seen corresponding path program 44 times [2022-03-20 18:37:17,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:37:17,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1161811656] [2022-03-20 18:37:17,746 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:37:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1190786511, now seen corresponding path program 1 times [2022-03-20 18:37:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:37:17,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445182546] [2022-03-20 18:37:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:17,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:37:17,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:37:17,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521954685] [2022-03-20 18:37:17,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:37:17,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:37:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:37:17,750 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:37:17,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 18:37:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:37:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:37:17,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:37:17,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:37:17,797 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:37:17,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:37:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445182546] [2022-03-20 18:37:17,797 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:37:17,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521954685] [2022-03-20 18:37:17,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521954685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:37:17,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:37:17,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:38:36,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:38:36,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1161811656] [2022-03-20 18:38:36,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1161811656] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:36,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:36,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 18:38:36,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137490280] [2022-03-20 18:38:36,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:38:36,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 18:38:36,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 18:38:36,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3114, Invalid=5628, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:38:36,912 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 94 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:38,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:38:38,035 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2022-03-20 18:38:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 18:38:38,035 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-03-20 18:38:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:38:38,036 INFO L225 Difference]: With dead ends: 109 [2022-03-20 18:38:38,036 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 18:38:38,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4221 ImplicationChecksByTransitivity, 79.0s TimeCoverageRelationStatistics Valid=3114, Invalid=5628, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 18:38:38,037 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 146 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 18:38:38,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 57 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 0 Unknown, 23 Unchecked, 1.1s Time] [2022-03-20 18:38:38,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 18:38:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-03-20 18:38:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-03-20 18:38:38,044 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2022-03-20 18:38:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:38:38,044 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-03-20 18:38:38,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:38:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-03-20 18:38:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 18:38:38,045 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:38:38,045 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:38:38,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-20 18:38:38,261 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 18:38:38,262 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:38:38,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:38:38,262 INFO L85 PathProgramCache]: Analyzing trace with hash 922177755, now seen corresponding path program 45 times [2022-03-20 18:38:38,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:38:38,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2032934047] [2022-03-20 18:38:38,451 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:38:38,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1131681167, now seen corresponding path program 1 times [2022-03-20 18:38:38,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:38:38,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851374021] [2022-03-20 18:38:38,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:38,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:38:38,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:38:38,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2120222920] [2022-03-20 18:38:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:38:38,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:38:38,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:38:38,456 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:38:38,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 18:38:38,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:38:38,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:38:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:38:38,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:38:38,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:38:38,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:38:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851374021] [2022-03-20 18:38:38,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:38:38,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120222920] [2022-03-20 18:38:38,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120222920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:38:38,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:38:38,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:40:00,561 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:40:00,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2032934047] [2022-03-20 18:40:00,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2032934047] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:40:00,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:40:00,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 18:40:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070768450] [2022-03-20 18:40:00,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:40:00,562 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 18:40:00,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:00,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 18:40:00,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3252, Invalid=5868, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 18:40:00,563 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 96 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:01,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:40:01,659 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2022-03-20 18:40:01,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 18:40:01,659 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-03-20 18:40:01,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:40:01,660 INFO L225 Difference]: With dead ends: 111 [2022-03-20 18:40:01,660 INFO L226 Difference]: Without dead ends: 106 [2022-03-20 18:40:01,660 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4407 ImplicationChecksByTransitivity, 81.9s TimeCoverageRelationStatistics Valid=3252, Invalid=5868, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 18:40:01,661 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 140 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 18:40:01,661 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 64 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 135 Invalid, 0 Unknown, 19 Unchecked, 1.0s Time] [2022-03-20 18:40:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-20 18:40:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-03-20 18:40:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-03-20 18:40:01,664 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2022-03-20 18:40:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:40:01,664 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-03-20 18:40:01,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:40:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-03-20 18:40:01,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 18:40:01,665 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:40:01,665 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:40:01,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 18:40:01,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:40:01,871 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:40:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:40:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1743412231, now seen corresponding path program 46 times [2022-03-20 18:40:01,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:40:01,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [359142011] [2022-03-20 18:40:02,033 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:40:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1072575823, now seen corresponding path program 1 times [2022-03-20 18:40:02,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:40:02,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069989813] [2022-03-20 18:40:02,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:40:02,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:40:02,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:40:02,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651091604] [2022-03-20 18:40:02,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:40:02,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:40:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:40:02,037 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:40:02,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 18:40:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:40:02,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:40:02,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:40:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:40:02,082 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:40:02,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:40:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069989813] [2022-03-20 18:40:02,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:40:02,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651091604] [2022-03-20 18:40:02,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651091604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:40:02,082 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:40:02,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:41:37,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:41:37,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [359142011] [2022-03-20 18:41:37,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [359142011] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:41:37,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:41:37,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 18:41:37,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368806721] [2022-03-20 18:41:37,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:41:37,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 18:41:37,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:37,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 18:41:37,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3393, Invalid=6113, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 18:41:37,938 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 98 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:41:39,281 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2022-03-20 18:41:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 18:41:39,281 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-03-20 18:41:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:41:39,282 INFO L225 Difference]: With dead ends: 113 [2022-03-20 18:41:39,282 INFO L226 Difference]: Without dead ends: 108 [2022-03-20 18:41:39,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4597 ImplicationChecksByTransitivity, 95.7s TimeCoverageRelationStatistics Valid=3393, Invalid=6113, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 18:41:39,282 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 147 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 18:41:39,283 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 84 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 145 Invalid, 0 Unknown, 44 Unchecked, 1.3s Time] [2022-03-20 18:41:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-20 18:41:39,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-03-20 18:41:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:39,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-03-20 18:41:39,286 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2022-03-20 18:41:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:41:39,286 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-03-20 18:41:39,286 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:41:39,286 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-03-20 18:41:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 18:41:39,287 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:41:39,287 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:41:39,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 18:41:39,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:41:39,495 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:41:39,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:41:39,496 INFO L85 PathProgramCache]: Analyzing trace with hash 720086935, now seen corresponding path program 47 times [2022-03-20 18:41:39,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:41:39,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [126379713] [2022-03-20 18:41:39,673 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:41:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1013470479, now seen corresponding path program 1 times [2022-03-20 18:41:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:41:39,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624790798] [2022-03-20 18:41:39,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:41:39,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:41:39,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:41:39,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850284225] [2022-03-20 18:41:39,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:41:39,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:41:39,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:41:39,678 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:41:39,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 18:41:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:41:39,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:41:39,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:41:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:41:39,726 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:41:39,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:41:39,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624790798] [2022-03-20 18:41:39,727 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:41:39,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850284225] [2022-03-20 18:41:39,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850284225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:41:39,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:41:39,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 18:43:26,341 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 18:43:26,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [126379713] [2022-03-20 18:43:26,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [126379713] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:43:26,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:43:26,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 18:43:26,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618933962] [2022-03-20 18:43:26,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 18:43:26,341 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 18:43:26,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 18:43:26,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 18:43:26,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3537, Invalid=6363, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:43:26,343 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 100 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:43:27,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 18:43:27,656 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2022-03-20 18:43:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 18:43:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-03-20 18:43:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 18:43:27,657 INFO L225 Difference]: With dead ends: 115 [2022-03-20 18:43:27,657 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 18:43:27,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 106.5s TimeCoverageRelationStatistics Valid=3537, Invalid=6363, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 18:43:27,658 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 185 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 18:43:27,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 43 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 139 Invalid, 0 Unknown, 19 Unchecked, 1.2s Time] [2022-03-20 18:43:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 18:43:27,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-03-20 18:43:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:43:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-03-20 18:43:27,662 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2022-03-20 18:43:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 18:43:27,662 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-03-20 18:43:27,662 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 18:43:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-03-20 18:43:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 18:43:27,663 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 18:43:27,663 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 18:43:27,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 18:43:27,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 18:43:27,874 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 18:43:27,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 18:43:27,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1615805365, now seen corresponding path program 48 times [2022-03-20 18:43:27,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 18:43:27,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1427791323] [2022-03-20 18:43:28,055 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 18:43:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash -954365135, now seen corresponding path program 1 times [2022-03-20 18:43:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 18:43:28,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974292718] [2022-03-20 18:43:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:43:28,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 18:43:28,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 18:43:28,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889335115] [2022-03-20 18:43:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 18:43:28,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 18:43:28,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 18:43:28,059 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 18:43:28,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 18:43:28,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 18:43:28,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 18:43:28,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 18:43:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 18:43:28,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 18:43:28,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 18:43:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974292718] [2022-03-20 18:43:28,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 18:43:28,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889335115] [2022-03-20 18:43:28,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889335115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 18:43:28,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 18:43:28,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3