/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 21:08:00,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 21:08:00,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 21:08:00,234 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 21:08:00,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 21:08:00,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 21:08:00,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 21:08:00,249 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 21:08:00,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 21:08:00,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 21:08:00,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 21:08:00,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 21:08:00,252 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 21:08:00,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 21:08:00,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 21:08:00,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 21:08:00,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 21:08:00,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 21:08:00,271 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 21:08:00,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 21:08:00,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 21:08:00,276 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 21:08:00,285 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 21:08:00,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 21:08:00,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 21:08:00,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 21:08:00,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 21:08:00,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 21:08:00,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 21:08:00,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 21:08:00,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 21:08:00,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 21:08:00,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 21:08:00,288 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 21:08:00,288 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 21:08:00,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 21:08:00,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 21:08:00,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:08:00,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 21:08:00,289 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 21:08:00,289 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 21:08:00,289 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 21:08:00,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 21:08:00,289 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 21:08:00,289 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 21:08:00,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 21:08:00,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 21:08:00,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 21:08:00,514 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 21:08:00,527 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 21:08:00,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2022-03-20 21:08:00,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1faf5f0f/1caa7f97df50413489a957ae56783a89/FLAGcdcc905d1 [2022-03-20 21:08:00,937 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 21:08:00,938 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c [2022-03-20 21:08:00,948 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1faf5f0f/1caa7f97df50413489a957ae56783a89/FLAGcdcc905d1 [2022-03-20 21:08:00,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c1faf5f0f/1caa7f97df50413489a957ae56783a89 [2022-03-20 21:08:00,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 21:08:00,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 21:08:00,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 21:08:00,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 21:08:00,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 21:08:00,965 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:08:00" (1/1) ... [2022-03-20 21:08:00,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@761ad3a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:00, skipping insertion in model container [2022-03-20 21:08:00,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 09:08:00" (1/1) ... [2022-03-20 21:08:00,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 21:08:00,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 21:08:01,106 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c[524,537] [2022-03-20 21:08:01,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:08:01,159 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 21:08:01,169 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound50.c[524,537] [2022-03-20 21:08:01,194 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 21:08:01,203 INFO L208 MainTranslator]: Completed translation [2022-03-20 21:08:01,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01 WrapperNode [2022-03-20 21:08:01,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 21:08:01,204 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 21:08:01,204 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 21:08:01,213 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 21:08:01,220 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (1/1) ... [2022-03-20 21:08:01,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (1/1) ... [2022-03-20 21:08:01,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (1/1) ... [2022-03-20 21:08:01,235 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (1/1) ... [2022-03-20 21:08:01,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (1/1) ... [2022-03-20 21:08:01,250 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (1/1) ... [2022-03-20 21:08:01,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (1/1) ... [2022-03-20 21:08:01,251 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 21:08:01,252 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 21:08:01,252 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 21:08:01,252 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 21:08:01,254 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (1/1) ... [2022-03-20 21:08:01,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 21:08:01,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:01,291 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 21:08:01,293 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 21:08:01,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 21:08:01,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 21:08:01,340 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 21:08:01,341 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 21:08:01,341 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 21:08:01,341 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 21:08:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 21:08:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 21:08:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 21:08:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 21:08:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 21:08:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 21:08:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 21:08:01,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 21:08:01,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 21:08:01,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 21:08:01,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 21:08:01,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 21:08:01,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 21:08:01,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 21:08:01,395 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 21:08:01,396 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 21:08:01,520 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 21:08:01,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 21:08:01,525 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 21:08:01,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:08:01 BoogieIcfgContainer [2022-03-20 21:08:01,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 21:08:01,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 21:08:01,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 21:08:01,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 21:08:01,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 09:08:00" (1/3) ... [2022-03-20 21:08:01,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c30710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:08:01, skipping insertion in model container [2022-03-20 21:08:01,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 09:08:01" (2/3) ... [2022-03-20 21:08:01,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c30710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 09:08:01, skipping insertion in model container [2022-03-20 21:08:01,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 09:08:01" (3/3) ... [2022-03-20 21:08:01,531 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound50.c [2022-03-20 21:08:01,534 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 21:08:01,534 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 21:08:01,612 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 21:08:01,618 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 21:08:01,618 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 21:08:01,634 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 21:08:01,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 21:08:01,639 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:01,640 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:01,640 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:01,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-03-20 21:08:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:01,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1513161379] [2022-03-20 21:08:01,675 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:01,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-03-20 21:08:01,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:01,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449520095] [2022-03-20 21:08:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:01,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:01,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96544040] [2022-03-20 21:08:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:01,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:01,773 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 21:08:01,824 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 21:08:01,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 21:08:01,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:01,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-20 21:08:01,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 21:08:01,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:08:01,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449520095] [2022-03-20 21:08:01,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:01,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96544040] [2022-03-20 21:08:01,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96544040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:01,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:01,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 21:08:01,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:01,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1513161379] [2022-03-20 21:08:01,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1513161379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:01,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:01,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 21:08:01,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990291970] [2022-03-20 21:08:01,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:01,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-20 21:08:01,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-20 21:08:01,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 21:08:01,954 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 21:08:01,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:01,974 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-20 21:08:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-20 21:08:01,975 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 21:08:01,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:01,981 INFO L225 Difference]: With dead ends: 53 [2022-03-20 21:08:01,981 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 21:08:01,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 21:08:01,987 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:01,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:01,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 21:08:02,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 21:08:02,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 21:08:02,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-20 21:08:02,027 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-20 21:08:02,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:02,028 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-20 21:08:02,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 21:08:02,028 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-20 21:08:02,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 21:08:02,029 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:02,030 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:02,049 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 21:08:02,247 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 21:08:02,247 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-03-20 21:08:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1711897290] [2022-03-20 21:08:02,249 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:02,249 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-03-20 21:08:02,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:02,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569185961] [2022-03-20 21:08:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:02,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:02,265 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:02,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044726908] [2022-03-20 21:08:02,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:02,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:02,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:02,276 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 21:08:02,277 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 21:08:02,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 21:08:02,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:02,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 21:08:02,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:02,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:08:02,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:02,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569185961] [2022-03-20 21:08:02,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:02,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044726908] [2022-03-20 21:08:02,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044726908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:02,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:02,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:08:02,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:02,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1711897290] [2022-03-20 21:08:02,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1711897290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:02,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:02,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 21:08:02,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410278707] [2022-03-20 21:08:02,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:02,402 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 21:08:02,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:02,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 21:08:02,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 21:08:02,402 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 21:08:02,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:02,412 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 21:08:02,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 21:08:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 21:08:02,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:02,413 INFO L225 Difference]: With dead ends: 34 [2022-03-20 21:08:02,413 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 21:08:02,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 21:08:02,414 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 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 21:08:02,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 21:08:02,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 21:08:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 21:08:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-20 21:08:02,420 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-20 21:08:02,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:02,420 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-20 21:08:02,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 21:08:02,421 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-20 21:08:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 21:08:02,421 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:02,421 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:02,450 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 21:08:02,638 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 21:08:02,639 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:02,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:02,639 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-03-20 21:08:02,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:02,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1364812590] [2022-03-20 21:08:02,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-03-20 21:08:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:02,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765501828] [2022-03-20 21:08:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:02,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:02,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:02,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [262507256] [2022-03-20 21:08:02,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:02,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:02,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:02,652 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 21:08:02,662 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 21:08:02,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 21:08:02,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:02,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 21:08:02,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:03,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 21:08:03,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765501828] [2022-03-20 21:08:03,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:03,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262507256] [2022-03-20 21:08:03,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262507256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:03,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:03,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:08:03,419 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:03,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1364812590] [2022-03-20 21:08:03,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1364812590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:03,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:03,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:08:03,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383067887] [2022-03-20 21:08:03,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:03,420 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:08:03,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:08:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 21:08:03,420 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 21:08:05,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 21:08:05,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:05,128 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-03-20 21:08:05,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 21:08:05,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 21:08:05,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:05,129 INFO L225 Difference]: With dead ends: 39 [2022-03-20 21:08:05,129 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 21:08:05,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 21:08:05,130 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:05,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 91 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 21:08:05,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 21:08:05,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 21:08:05,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 21:08:05,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-20 21:08:05,137 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2022-03-20 21:08:05,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:05,137 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-20 21:08:05,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 21:08:05,137 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-20 21:08:05,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 21:08:05,138 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:05,138 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:05,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-20 21:08:05,350 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 21:08:05,351 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:05,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-03-20 21:08:05,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:05,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [935041377] [2022-03-20 21:08:05,352 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-03-20 21:08:05,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:05,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737413988] [2022-03-20 21:08:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:05,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:05,367 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:05,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35383806] [2022-03-20 21:08:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:05,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:05,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:05,369 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 21:08:05,372 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 21:08:05,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:05,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 21:08:05,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:05,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:05,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737413988] [2022-03-20 21:08:05,717 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:05,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35383806] [2022-03-20 21:08:05,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35383806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:05,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:05,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 21:08:05,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:05,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [935041377] [2022-03-20 21:08:05,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [935041377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:05,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:05,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:08:05,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779720200] [2022-03-20 21:08:05,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:05,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:08:05,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:05,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:08:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:08:05,720 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 21:08:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:05,793 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-03-20 21:08:05,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 21:08:05,793 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-20 21:08:05,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:05,794 INFO L225 Difference]: With dead ends: 43 [2022-03-20 21:08:05,794 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 21:08:05,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 21:08:05,795 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:05,795 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:05,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 21:08:05,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-03-20 21:08:05,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 21:08:05,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-20 21:08:05,801 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-20 21:08:05,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:05,801 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-20 21:08:05,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 21:08:05,802 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-20 21:08:05,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 21:08:05,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:05,802 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:05,825 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 21:08:06,015 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 21:08:06,016 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:06,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:06,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-03-20 21:08:06,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:06,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899295721] [2022-03-20 21:08:06,017 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:06,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-03-20 21:08:06,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:06,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167717091] [2022-03-20 21:08:06,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:06,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:06,027 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:06,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [374447948] [2022-03-20 21:08:06,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:06,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:06,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:06,029 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 21:08:06,030 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 21:08:06,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:06,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 21:08:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:06,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:06,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:06,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167717091] [2022-03-20 21:08:06,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:06,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374447948] [2022-03-20 21:08:06,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374447948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:06,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:06,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 21:08:06,194 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:06,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899295721] [2022-03-20 21:08:06,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899295721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:06,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:06,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 21:08:06,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47604206] [2022-03-20 21:08:06,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:06,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 21:08:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:06,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 21:08:06,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 21:08:06,195 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 21:08:06,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:06,226 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-20 21:08:06,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 21:08:06,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-20 21:08:06,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:06,228 INFO L225 Difference]: With dead ends: 43 [2022-03-20 21:08:06,228 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 21:08:06,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 21:08:06,228 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:06,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 78 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 21:08:06,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 21:08:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 21:08:06,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-20 21:08:06,236 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-03-20 21:08:06,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:06,236 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-20 21:08:06,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 21:08:06,236 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-20 21:08:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 21:08:06,237 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:06,237 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:06,266 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 21:08:06,443 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 21:08:06,444 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-03-20 21:08:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:06,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7756457] [2022-03-20 21:08:06,444 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:06,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-03-20 21:08:06,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:06,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548591279] [2022-03-20 21:08:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:06,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:06,454 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:06,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1301977729] [2022-03-20 21:08:06,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:06,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:06,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:06,462 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 21:08:06,483 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 21:08:06,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:06,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 21:08:06,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:06,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 21:08:06,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:06,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548591279] [2022-03-20 21:08:06,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:06,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301977729] [2022-03-20 21:08:06,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301977729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:06,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:06,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 21:08:06,698 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:06,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7756457] [2022-03-20 21:08:06,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7756457] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:06,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:06,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 21:08:06,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546561328] [2022-03-20 21:08:06,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:06,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 21:08:06,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:06,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 21:08:06,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 21:08:06,699 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 21:08:06,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:06,750 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-20 21:08:06,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 21:08:06,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-20 21:08:06,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:06,751 INFO L225 Difference]: With dead ends: 52 [2022-03-20 21:08:06,751 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 21:08:06,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:08:06,752 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:06,752 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 21:08:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 21:08:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 21:08:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-20 21:08:06,761 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2022-03-20 21:08:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:06,761 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-20 21:08:06,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 21:08:06,761 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-20 21:08:06,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 21:08:06,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:06,762 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:06,781 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 21:08:06,982 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 21:08:06,982 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:06,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 5 times [2022-03-20 21:08:06,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:06,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1748711831] [2022-03-20 21:08:06,983 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 6 times [2022-03-20 21:08:06,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:06,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411997389] [2022-03-20 21:08:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:06,991 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:06,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1021534755] [2022-03-20 21:08:06,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:07,001 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 21:08:07,003 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 21:08:07,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 21:08:07,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:07,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 21:08:07,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:07,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:07,278 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 21:08:07,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:07,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411997389] [2022-03-20 21:08:07,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:07,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021534755] [2022-03-20 21:08:07,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021534755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:07,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:07,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 21:08:07,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:07,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1748711831] [2022-03-20 21:08:07,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1748711831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:07,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:07,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 21:08:07,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586539169] [2022-03-20 21:08:07,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:07,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 21:08:07,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:07,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 21:08:07,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 21:08:07,280 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 21:08:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:07,329 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-20 21:08:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 21:08:07,330 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-20 21:08:07,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:07,330 INFO L225 Difference]: With dead ends: 61 [2022-03-20 21:08:07,330 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 21:08:07,331 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-20 21:08:07,331 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:07,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 21:08:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 21:08:07,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 21:08:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-20 21:08:07,341 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2022-03-20 21:08:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:07,342 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-20 21:08:07,342 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 21:08:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-20 21:08:07,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 21:08:07,342 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:07,342 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:07,379 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 21:08:07,559 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 21:08:07,559 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:07,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 7 times [2022-03-20 21:08:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:07,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498509029] [2022-03-20 21:08:07,560 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:07,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 8 times [2022-03-20 21:08:07,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:07,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103727415] [2022-03-20 21:08:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:07,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:07,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594097251] [2022-03-20 21:08:07,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:07,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:07,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:07,588 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 21:08:07,589 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 21:08:07,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:07,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:07,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 21:08:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:07,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 21:08:07,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103727415] [2022-03-20 21:08:07,884 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594097251] [2022-03-20 21:08:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594097251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:07,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 21:08:07,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:07,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498509029] [2022-03-20 21:08:07,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498509029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:07,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:07,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 21:08:07,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310847034] [2022-03-20 21:08:07,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:07,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 21:08:07,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:07,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 21:08:07,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 21:08:07,885 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 21:08:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:07,945 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-20 21:08:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 21:08:07,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-20 21:08:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:07,947 INFO L225 Difference]: With dead ends: 70 [2022-03-20 21:08:07,947 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 21:08:07,947 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 21:08:07,948 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:07,948 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 114 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:07,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 21:08:07,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 21:08:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 21:08:07,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-03-20 21:08:07,974 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2022-03-20 21:08:07,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:07,975 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-03-20 21:08:07,975 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 21:08:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-03-20 21:08:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 21:08:07,976 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:07,976 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:08,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:08,190 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 21:08:08,191 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:08,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:08,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 9 times [2022-03-20 21:08:08,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:08,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1863094483] [2022-03-20 21:08:08,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:08,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 10 times [2022-03-20 21:08:08,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:08,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396801356] [2022-03-20 21:08:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:08,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:08,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:08,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534377116] [2022-03-20 21:08:08,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:08,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:08,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:08,202 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 21:08:08,204 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 21:08:08,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:08,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 21:08:08,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:08,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 21:08:08,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:08,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396801356] [2022-03-20 21:08:08,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:08,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534377116] [2022-03-20 21:08:08,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534377116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:08,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:08,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 21:08:08,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:08,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1863094483] [2022-03-20 21:08:08,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1863094483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:08,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:08,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 21:08:08,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067434934] [2022-03-20 21:08:08,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:08,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 21:08:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:08,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 21:08:08,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 21:08:08,652 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 21:08:08,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:08,719 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-03-20 21:08:08,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 21:08:08,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-20 21:08:08,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:08,720 INFO L225 Difference]: With dead ends: 79 [2022-03-20 21:08:08,721 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 21:08:08,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-20 21:08:08,721 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:08,722 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:08,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 21:08:08,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 21:08:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 21:08:08,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-03-20 21:08:08,734 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2022-03-20 21:08:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:08,735 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-03-20 21:08:08,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 21:08:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-03-20 21:08:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 21:08:08,736 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:08,736 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:08,759 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 21:08:08,953 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 21:08:08,954 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:08,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:08,954 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 11 times [2022-03-20 21:08:08,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:08,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008213145] [2022-03-20 21:08:08,954 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:08,955 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 12 times [2022-03-20 21:08:08,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:08,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028224369] [2022-03-20 21:08:08,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:08,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:08,961 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:08,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [561826609] [2022-03-20 21:08:08,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:08,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:08,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:08,962 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 21:08:08,995 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 21:08:09,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 21:08:09,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:09,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 21:08:09,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:09,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:09,444 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 21:08:09,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:09,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028224369] [2022-03-20 21:08:09,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:09,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561826609] [2022-03-20 21:08:09,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561826609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:09,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:09,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 21:08:09,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:09,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008213145] [2022-03-20 21:08:09,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008213145] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:09,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:09,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 21:08:09,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598963924] [2022-03-20 21:08:09,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:09,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 21:08:09,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:09,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 21:08:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 21:08:09,447 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 21:08:09,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:09,544 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-03-20 21:08:09,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 21:08:09,545 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2022-03-20 21:08:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:09,546 INFO L225 Difference]: With dead ends: 88 [2022-03-20 21:08:09,546 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 21:08:09,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:08:09,547 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:09,548 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 118 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:09,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 21:08:09,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 21:08:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 21:08:09,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-03-20 21:08:09,565 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2022-03-20 21:08:09,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:09,565 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-03-20 21:08:09,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 21:08:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-03-20 21:08:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 21:08:09,569 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:09,569 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:09,586 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 21:08:09,775 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 21:08:09,775 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 13 times [2022-03-20 21:08:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:09,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [4517532] [2022-03-20 21:08:09,776 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 14 times [2022-03-20 21:08:09,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:09,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914404319] [2022-03-20 21:08:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:09,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:09,797 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:09,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568287124] [2022-03-20 21:08:09,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:09,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:09,798 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 21:08:09,811 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 21:08:09,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:09,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:09,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 21:08:09,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:10,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 21:08:10,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914404319] [2022-03-20 21:08:10,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:10,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568287124] [2022-03-20 21:08:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568287124] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:10,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 21:08:10,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:10,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [4517532] [2022-03-20 21:08:10,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [4517532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:10,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:10,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 21:08:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182363373] [2022-03-20 21:08:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:10,257 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 21:08:10,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:10,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 21:08:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 21:08:10,258 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 21:08:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:10,349 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-20 21:08:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 21:08:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2022-03-20 21:08:10,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:10,350 INFO L225 Difference]: With dead ends: 97 [2022-03-20 21:08:10,350 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 21:08:10,350 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-20 21:08:10,351 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:10,351 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 138 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:10,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 21:08:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-20 21:08:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 21:08:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-03-20 21:08:10,361 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2022-03-20 21:08:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:10,361 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-03-20 21:08:10,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 21:08:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-03-20 21:08:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 21:08:10,362 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:10,362 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:10,399 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 21:08:10,579 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 21:08:10,579 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 15 times [2022-03-20 21:08:10,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:10,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1307766967] [2022-03-20 21:08:10,580 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:10,580 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 16 times [2022-03-20 21:08:10,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:10,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985996839] [2022-03-20 21:08:10,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:10,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:10,587 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:10,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [804025368] [2022-03-20 21:08:10,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:10,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:10,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:10,603 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 21:08:10,604 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 21:08:10,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:10,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:10,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 21:08:10,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:10,891 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:10,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 21:08:11,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:11,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985996839] [2022-03-20 21:08:11,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804025368] [2022-03-20 21:08:11,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804025368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:11,159 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:11,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 21:08:11,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1307766967] [2022-03-20 21:08:11,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1307766967] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:11,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:11,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 21:08:11,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415746700] [2022-03-20 21:08:11,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:11,160 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 21:08:11,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:11,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 21:08:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 21:08:11,160 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 21:08:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:11,264 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-03-20 21:08:11,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 21:08:11,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2022-03-20 21:08:11,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:11,267 INFO L225 Difference]: With dead ends: 106 [2022-03-20 21:08:11,267 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 21:08:11,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:08:11,267 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 18 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:11,268 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 152 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:11,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 21:08:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 21:08:11,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 21:08:11,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-03-20 21:08:11,281 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2022-03-20 21:08:11,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:11,281 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-03-20 21:08:11,281 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 21:08:11,281 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-03-20 21:08:11,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 21:08:11,282 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:11,282 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:11,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 21:08:11,499 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 21:08:11,499 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:11,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:11,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 17 times [2022-03-20 21:08:11,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:11,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1066487273] [2022-03-20 21:08:11,500 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:11,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 18 times [2022-03-20 21:08:11,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:11,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750855439] [2022-03-20 21:08:11,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:11,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:11,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:11,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420423354] [2022-03-20 21:08:11,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:11,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:11,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:11,509 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 21:08:11,512 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 21:08:11,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 21:08:11,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:11,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 21:08:11,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:11,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 21:08:12,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750855439] [2022-03-20 21:08:12,179 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420423354] [2022-03-20 21:08:12,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420423354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:12,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:12,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 21:08:12,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:12,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1066487273] [2022-03-20 21:08:12,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1066487273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:12,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:12,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 21:08:12,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597276183] [2022-03-20 21:08:12,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:12,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 21:08:12,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 21:08:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 21:08:12,181 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 21:08:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:12,294 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-03-20 21:08:12,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 21:08:12,294 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2022-03-20 21:08:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:12,295 INFO L225 Difference]: With dead ends: 115 [2022-03-20 21:08:12,295 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 21:08:12,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 21:08:12,296 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:12,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 148 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 21:08:12,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 21:08:12,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 21:08:12,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 21:08:12,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-20 21:08:12,306 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2022-03-20 21:08:12,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:12,307 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-20 21:08:12,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 21:08:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-20 21:08:12,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 21:08:12,307 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:12,307 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:12,314 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 21:08:12,509 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 21:08:12,509 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 19 times [2022-03-20 21:08:12,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:12,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [787652055] [2022-03-20 21:08:12,517 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:12,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 20 times [2022-03-20 21:08:12,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:12,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558304992] [2022-03-20 21:08:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:12,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:12,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:12,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325629096] [2022-03-20 21:08:12,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:12,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:12,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:12,551 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 21:08:12,566 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 21:08:12,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:12,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:12,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 21:08:12,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:12,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 21:08:13,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:13,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558304992] [2022-03-20 21:08:13,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:13,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325629096] [2022-03-20 21:08:13,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325629096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:13,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:13,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 21:08:13,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [787652055] [2022-03-20 21:08:13,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [787652055] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:13,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:13,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 21:08:13,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184817363] [2022-03-20 21:08:13,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:13,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 21:08:13,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:13,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 21:08:13,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 21:08:13,186 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 21:08:13,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:13,323 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-03-20 21:08:13,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 21:08:13,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2022-03-20 21:08:13,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:13,324 INFO L225 Difference]: With dead ends: 124 [2022-03-20 21:08:13,324 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 21:08:13,325 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:08:13,325 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:13,325 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 150 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:13,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 21:08:13,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 21:08:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 21:08:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2022-03-20 21:08:13,337 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2022-03-20 21:08:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:13,338 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2022-03-20 21:08:13,338 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 21:08:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2022-03-20 21:08:13,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 21:08:13,338 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:13,339 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:13,356 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 21:08:13,556 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 21:08:13,556 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:13,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:13,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 21 times [2022-03-20 21:08:13,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:13,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1909760381] [2022-03-20 21:08:13,557 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 22 times [2022-03-20 21:08:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:13,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763267946] [2022-03-20 21:08:13,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:13,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:13,563 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:13,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [957804233] [2022-03-20 21:08:13,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:13,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:13,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:13,565 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 21:08:13,566 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 21:08:13,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:13,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 21:08:13,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:13,873 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:13,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:14,190 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 297 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 21:08:14,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:14,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763267946] [2022-03-20 21:08:14,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:14,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957804233] [2022-03-20 21:08:14,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957804233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:14,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:14,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 21:08:14,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:14,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1909760381] [2022-03-20 21:08:14,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1909760381] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:14,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:14,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 21:08:14,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999653891] [2022-03-20 21:08:14,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:14,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 21:08:14,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:14,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 21:08:14,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 21:08:14,192 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 21:08:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:14,330 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-03-20 21:08:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 21:08:14,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2022-03-20 21:08:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:14,331 INFO L225 Difference]: With dead ends: 133 [2022-03-20 21:08:14,331 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 21:08:14,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 21:08:14,332 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:14,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 170 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 21:08:14,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-20 21:08:14,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 21:08:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2022-03-20 21:08:14,366 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2022-03-20 21:08:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:14,366 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2022-03-20 21:08:14,366 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 21:08:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2022-03-20 21:08:14,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 21:08:14,368 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:14,368 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:14,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:14,576 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 21:08:14,577 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:14,577 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 23 times [2022-03-20 21:08:14,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:14,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1673191948] [2022-03-20 21:08:14,578 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:14,578 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 24 times [2022-03-20 21:08:14,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:14,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226435087] [2022-03-20 21:08:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:14,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:14,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162738039] [2022-03-20 21:08:14,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:14,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:14,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:14,586 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 21:08:14,587 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 21:08:16,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 21:08:16,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 21:08:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:16,510 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:16,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 354 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 21:08:16,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:16,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226435087] [2022-03-20 21:08:16,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:16,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162738039] [2022-03-20 21:08:16,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162738039] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:16,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:16,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 21:08:16,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:16,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1673191948] [2022-03-20 21:08:16,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1673191948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:16,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:16,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 21:08:16,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013026760] [2022-03-20 21:08:16,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:16,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 21:08:16,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:16,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 21:08:16,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 21:08:16,877 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 21:08:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:17,034 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-03-20 21:08:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 21:08:17,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2022-03-20 21:08:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:17,035 INFO L225 Difference]: With dead ends: 142 [2022-03-20 21:08:17,035 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 21:08:17,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:08:17,036 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:17,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 21:08:17,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 21:08:17,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 21:08:17,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-03-20 21:08:17,049 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2022-03-20 21:08:17,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:17,050 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-03-20 21:08:17,050 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 21:08:17,050 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-03-20 21:08:17,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 21:08:17,051 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:17,051 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:17,059 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 21:08:17,258 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 21:08:17,258 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 25 times [2022-03-20 21:08:17,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:17,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1219565252] [2022-03-20 21:08:17,259 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 26 times [2022-03-20 21:08:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:17,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117662103] [2022-03-20 21:08:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:17,269 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:17,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [279275254] [2022-03-20 21:08:17,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:17,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:17,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:17,270 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 21:08:17,271 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 21:08:17,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:17,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:17,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 21:08:17,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:17,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 416 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 21:08:17,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117662103] [2022-03-20 21:08:17,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279275254] [2022-03-20 21:08:17,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279275254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:17,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:17,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 21:08:17,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1219565252] [2022-03-20 21:08:17,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1219565252] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:17,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:17,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 21:08:17,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992112287] [2022-03-20 21:08:17,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:17,955 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 21:08:17,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 21:08:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 21:08:17,955 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 21:08:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:18,130 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2022-03-20 21:08:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 21:08:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2022-03-20 21:08:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:18,132 INFO L225 Difference]: With dead ends: 151 [2022-03-20 21:08:18,132 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 21:08:18,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 21:08:18,133 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 54 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:18,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 186 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:18,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 21:08:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-20 21:08:18,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 21:08:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-03-20 21:08:18,147 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2022-03-20 21:08:18,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:18,149 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-03-20 21:08:18,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 21:08:18,149 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-03-20 21:08:18,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 21:08:18,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:18,150 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:18,169 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 21:08:18,367 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 21:08:18,367 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:18,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 27 times [2022-03-20 21:08:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797163086] [2022-03-20 21:08:18,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:18,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 28 times [2022-03-20 21:08:18,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:18,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026282201] [2022-03-20 21:08:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:18,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:18,374 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:18,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840966173] [2022-03-20 21:08:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:18,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:18,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:18,378 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 21:08:18,378 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 21:08:18,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:18,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:18,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 21:08:18,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:18,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 483 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 21:08:19,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:19,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026282201] [2022-03-20 21:08:19,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:19,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840966173] [2022-03-20 21:08:19,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840966173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:19,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:19,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 21:08:19,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:19,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797163086] [2022-03-20 21:08:19,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797163086] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:19,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:19,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 21:08:19,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158933263] [2022-03-20 21:08:19,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:19,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 21:08:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 21:08:19,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 21:08:19,217 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 21:08:19,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:19,403 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-03-20 21:08:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 21:08:19,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2022-03-20 21:08:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:19,404 INFO L225 Difference]: With dead ends: 160 [2022-03-20 21:08:19,404 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 21:08:19,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 21:08:19,405 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:19,405 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 188 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 21:08:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-20 21:08:19,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 21:08:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2022-03-20 21:08:19,422 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2022-03-20 21:08:19,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:19,436 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2022-03-20 21:08:19,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 21:08:19,436 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2022-03-20 21:08:19,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 21:08:19,437 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:19,437 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:19,445 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 21:08:19,642 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 21:08:19,642 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 29 times [2022-03-20 21:08:19,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:19,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1613345004] [2022-03-20 21:08:19,643 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:19,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 30 times [2022-03-20 21:08:19,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:19,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695040496] [2022-03-20 21:08:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:19,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:19,649 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:19,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445159749] [2022-03-20 21:08:19,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:19,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:19,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:19,658 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 21:08:19,661 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 21:08:42,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 21:08:42,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 21:08:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:43,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:43,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 555 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 21:08:43,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695040496] [2022-03-20 21:08:43,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:43,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445159749] [2022-03-20 21:08:43,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445159749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:43,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:43,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 21:08:43,704 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:43,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1613345004] [2022-03-20 21:08:43,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1613345004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:43,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:43,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 21:08:43,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005663605] [2022-03-20 21:08:43,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:43,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 21:08:43,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:43,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 21:08:43,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 21:08:43,705 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 21:08:43,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:43,940 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-03-20 21:08:43,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 21:08:43,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2022-03-20 21:08:43,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:43,941 INFO L225 Difference]: With dead ends: 169 [2022-03-20 21:08:43,941 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 21:08:43,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 21:08:43,942 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 61 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:43,942 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 196 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 21:08:43,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-20 21:08:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 21:08:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2022-03-20 21:08:43,956 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2022-03-20 21:08:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:43,956 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2022-03-20 21:08:43,956 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 21:08:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2022-03-20 21:08:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 21:08:43,957 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:43,957 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:43,968 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 21:08:44,166 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 21:08:44,166 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:44,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 31 times [2022-03-20 21:08:44,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:44,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498486929] [2022-03-20 21:08:44,167 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:44,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 32 times [2022-03-20 21:08:44,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:44,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888192033] [2022-03-20 21:08:44,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:44,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:44,174 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:44,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482875905] [2022-03-20 21:08:44,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:44,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:44,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:44,175 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 21:08:44,176 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 21:08:44,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:44,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:44,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 21:08:44,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:44,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 632 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 21:08:45,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:45,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888192033] [2022-03-20 21:08:45,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:45,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482875905] [2022-03-20 21:08:45,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482875905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:45,084 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:45,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 21:08:45,085 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:45,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498486929] [2022-03-20 21:08:45,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498486929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:45,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:45,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 21:08:45,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465973507] [2022-03-20 21:08:45,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:45,086 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 21:08:45,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 21:08:45,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 21:08:45,087 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 21:08:45,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:45,364 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-03-20 21:08:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 21:08:45,365 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2022-03-20 21:08:45,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:45,366 INFO L225 Difference]: With dead ends: 178 [2022-03-20 21:08:45,366 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 21:08:45,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:08:45,368 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 58 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:45,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 204 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 21:08:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 21:08:45,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 21:08:45,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-03-20 21:08:45,395 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2022-03-20 21:08:45,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:45,396 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-03-20 21:08:45,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 21:08:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-03-20 21:08:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 21:08:45,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:45,397 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:45,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:45,606 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 21:08:45,606 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:45,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:45,606 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 33 times [2022-03-20 21:08:45,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:45,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2078627791] [2022-03-20 21:08:45,607 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:45,607 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 34 times [2022-03-20 21:08:45,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:45,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189681695] [2022-03-20 21:08:45,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:45,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:45,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:45,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1340162925] [2022-03-20 21:08:45,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:45,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:45,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:45,615 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 21:08:45,616 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 21:08:45,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:45,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:45,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 21:08:45,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:46,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:46,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:46,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 714 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-20 21:08:46,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:46,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189681695] [2022-03-20 21:08:46,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:46,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340162925] [2022-03-20 21:08:46,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340162925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:46,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:46,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 21:08:46,619 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:46,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2078627791] [2022-03-20 21:08:46,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2078627791] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:46,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:46,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 21:08:46,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033095083] [2022-03-20 21:08:46,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:46,620 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 21:08:46,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 21:08:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 21:08:46,621 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 21:08:46,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:46,891 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2022-03-20 21:08:46,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 21:08:46,891 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2022-03-20 21:08:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:46,892 INFO L225 Difference]: With dead ends: 187 [2022-03-20 21:08:46,892 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 21:08:46,893 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 21:08:46,893 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 76 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:46,894 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 218 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 21:08:46,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-20 21:08:46,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 21:08:46,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2022-03-20 21:08:46,914 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2022-03-20 21:08:46,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:46,914 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2022-03-20 21:08:46,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 21:08:46,914 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2022-03-20 21:08:46,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 21:08:46,915 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:46,915 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:46,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:47,120 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 21:08:47,120 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:47,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:47,120 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 35 times [2022-03-20 21:08:47,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [125788410] [2022-03-20 21:08:47,121 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:47,121 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 36 times [2022-03-20 21:08:47,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:47,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164474210] [2022-03-20 21:08:47,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:47,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:47,127 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:47,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2352184] [2022-03-20 21:08:47,127 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:47,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:47,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:47,128 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 21:08:47,129 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 21:08:47,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 21:08:47,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 21:08:47,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:47,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:48,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 801 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 21:08:48,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:48,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164474210] [2022-03-20 21:08:48,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:48,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2352184] [2022-03-20 21:08:48,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2352184] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:48,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:48,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 21:08:48,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:48,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [125788410] [2022-03-20 21:08:48,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [125788410] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:48,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:48,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 21:08:48,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010522369] [2022-03-20 21:08:48,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:48,450 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 21:08:48,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:48,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 21:08:48,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 21:08:48,451 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 21:08:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:48,732 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-03-20 21:08:48,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 21:08:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2022-03-20 21:08:48,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:48,733 INFO L225 Difference]: With dead ends: 196 [2022-03-20 21:08:48,733 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 21:08:48,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 21:08:48,734 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:48,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 220 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 21:08:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-20 21:08:48,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 21:08:48,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2022-03-20 21:08:48,761 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2022-03-20 21:08:48,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:48,761 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2022-03-20 21:08:48,762 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 21:08:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2022-03-20 21:08:48,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-20 21:08:48,762 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:48,762 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:48,768 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 21:08:48,963 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 21:08:48,963 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:48,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:48,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 37 times [2022-03-20 21:08:48,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:48,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806603013] [2022-03-20 21:08:48,964 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:48,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 38 times [2022-03-20 21:08:48,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:48,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315594272] [2022-03-20 21:08:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:48,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:48,975 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:48,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756505681] [2022-03-20 21:08:48,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:48,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:48,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:48,976 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 21:08:48,977 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 21:08:49,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:49,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:49,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 21:08:49,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:49,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:50,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 893 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-20 21:08:50,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:50,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315594272] [2022-03-20 21:08:50,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:50,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756505681] [2022-03-20 21:08:50,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756505681] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:50,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:50,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 21:08:50,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:50,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806603013] [2022-03-20 21:08:50,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806603013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:50,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:50,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 21:08:50,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075710075] [2022-03-20 21:08:50,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:50,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 21:08:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:50,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 21:08:50,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 21:08:50,130 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 21:08:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:50,383 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-03-20 21:08:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 21:08:50,383 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2022-03-20 21:08:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:50,384 INFO L225 Difference]: With dead ends: 205 [2022-03-20 21:08:50,384 INFO L226 Difference]: Without dead ends: 200 [2022-03-20 21:08:50,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 21:08:50,389 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 62 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:50,390 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 228 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:50,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-20 21:08:50,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-20 21:08:50,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 21:08:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-03-20 21:08:50,408 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2022-03-20 21:08:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:50,409 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-03-20 21:08:50,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 21:08:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-03-20 21:08:50,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 21:08:50,410 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:50,410 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:50,416 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 21:08:50,616 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 21:08:50,616 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:50,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 39 times [2022-03-20 21:08:50,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:50,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017251513] [2022-03-20 21:08:50,617 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:50,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 40 times [2022-03-20 21:08:50,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:50,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64041797] [2022-03-20 21:08:50,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:50,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:50,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:50,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130990452] [2022-03-20 21:08:50,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:50,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:50,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:50,648 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 21:08:50,649 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 21:08:50,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:50,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 21:08:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:51,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:51,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 990 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 21:08:51,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:51,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64041797] [2022-03-20 21:08:51,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:51,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130990452] [2022-03-20 21:08:51,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130990452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:51,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:51,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 21:08:51,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:51,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1017251513] [2022-03-20 21:08:51,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1017251513] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:51,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:51,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 21:08:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235750851] [2022-03-20 21:08:51,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:51,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 21:08:51,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:51,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 21:08:51,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 21:08:51,692 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 21:08:51,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:51,903 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-03-20 21:08:51,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 21:08:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2022-03-20 21:08:51,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:51,904 INFO L225 Difference]: With dead ends: 214 [2022-03-20 21:08:51,904 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 21:08:51,906 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 21:08:51,906 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:51,906 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 242 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:51,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 21:08:51,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-20 21:08:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 21:08:51,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2022-03-20 21:08:51,923 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2022-03-20 21:08:51,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:51,923 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2022-03-20 21:08:51,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 21:08:51,923 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2022-03-20 21:08:51,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-20 21:08:51,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:51,924 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:51,939 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 21:08:52,129 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 21:08:52,129 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 41 times [2022-03-20 21:08:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:52,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1256078361] [2022-03-20 21:08:52,130 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 42 times [2022-03-20 21:08:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:52,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356824644] [2022-03-20 21:08:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:52,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:52,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679616599] [2022-03-20 21:08:52,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:08:52,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:52,138 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 21:08:52,144 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 21:08:55,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 21:08:55,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:55,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 21:08:55,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:56,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1092 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 21:08:56,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:56,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356824644] [2022-03-20 21:08:56,932 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:56,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679616599] [2022-03-20 21:08:56,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679616599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:56,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:56,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 21:08:56,932 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:56,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1256078361] [2022-03-20 21:08:56,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1256078361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:56,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:56,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 21:08:56,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509813049] [2022-03-20 21:08:56,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:56,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 21:08:56,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:56,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 21:08:56,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 21:08:56,934 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 21:08:57,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:57,270 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-03-20 21:08:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 21:08:57,270 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2022-03-20 21:08:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:57,272 INFO L225 Difference]: With dead ends: 223 [2022-03-20 21:08:57,272 INFO L226 Difference]: Without dead ends: 218 [2022-03-20 21:08:57,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 21:08:57,273 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:57,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 244 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-20 21:08:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-20 21:08:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 21:08:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-20 21:08:57,292 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2022-03-20 21:08:57,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:57,292 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-20 21:08:57,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 21:08:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-20 21:08:57,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-20 21:08:57,293 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:57,293 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:57,303 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 21:08:57,501 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 21:08:57,501 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:57,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 43 times [2022-03-20 21:08:57,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:57,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [516488188] [2022-03-20 21:08:57,502 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:57,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 44 times [2022-03-20 21:08:57,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:57,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139981104] [2022-03-20 21:08:57,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:57,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:57,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:57,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661380600] [2022-03-20 21:08:57,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:08:57,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:57,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:57,524 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 21:08:57,525 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 21:08:57,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:08:57,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:57,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 21:08:57,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:08:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:08:58,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:08:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-20 21:08:58,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:08:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139981104] [2022-03-20 21:08:58,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:08:58,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661380600] [2022-03-20 21:08:58,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661380600] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:08:58,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:08:58,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 21:08:58,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:08:58,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [516488188] [2022-03-20 21:08:58,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [516488188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:08:58,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:08:58,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 21:08:58,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354060498] [2022-03-20 21:08:58,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:08:58,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 21:08:58,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:58,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 21:08:58,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 21:08:58,882 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 21:08:59,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:08:59,267 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2022-03-20 21:08:59,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 21:08:59,268 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2022-03-20 21:08:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:08:59,269 INFO L225 Difference]: With dead ends: 232 [2022-03-20 21:08:59,269 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 21:08:59,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 21:08:59,271 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:08:59,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 270 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:08:59,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 21:08:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-20 21:08:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 21:08:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2022-03-20 21:08:59,289 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2022-03-20 21:08:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:08:59,290 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2022-03-20 21:08:59,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 21:08:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2022-03-20 21:08:59,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-03-20 21:08:59,291 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:08:59,291 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:08:59,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 21:08:59,508 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 21:08:59,508 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:08:59,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:08:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 45 times [2022-03-20 21:08:59,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:08:59,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1258283545] [2022-03-20 21:08:59,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:08:59,509 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 46 times [2022-03-20 21:08:59,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:08:59,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940489195] [2022-03-20 21:08:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:08:59,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:08:59,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:08:59,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402489421] [2022-03-20 21:08:59,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:08:59,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:08:59,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:08:59,547 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 21:08:59,549 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 21:08:59,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:08:59,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:08:59,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 21:08:59,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:00,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:00,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 1311 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2022-03-20 21:09:01,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940489195] [2022-03-20 21:09:01,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:01,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402489421] [2022-03-20 21:09:01,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402489421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:01,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:01,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-20 21:09:01,019 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:01,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1258283545] [2022-03-20 21:09:01,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1258283545] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:01,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:01,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 21:09:01,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043187623] [2022-03-20 21:09:01,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:01,019 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 21:09:01,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:01,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 21:09:01,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 21:09:01,020 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 21:09:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:01,435 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2022-03-20 21:09:01,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 21:09:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2022-03-20 21:09:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:01,436 INFO L225 Difference]: With dead ends: 241 [2022-03-20 21:09:01,436 INFO L226 Difference]: Without dead ends: 236 [2022-03-20 21:09:01,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 21:09:01,437 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 90 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:01,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 260 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:01,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-20 21:09:01,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-03-20 21:09:01,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 21:09:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2022-03-20 21:09:01,460 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2022-03-20 21:09:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:01,461 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2022-03-20 21:09:01,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 21:09:01,462 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2022-03-20 21:09:01,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-20 21:09:01,463 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:01,463 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:01,470 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 21:09:01,668 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 21:09:01,668 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:01,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 47 times [2022-03-20 21:09:01,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:01,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1038944039] [2022-03-20 21:09:01,669 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:01,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 48 times [2022-03-20 21:09:01,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:01,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16552384] [2022-03-20 21:09:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:01,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:01,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:01,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2013332510] [2022-03-20 21:09:01,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:09:01,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:01,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:01,681 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 21:09:01,719 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 21:09:14,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 21:09:14,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:14,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 21:09:14,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:15,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:15,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 1428 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-20 21:09:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:16,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16552384] [2022-03-20 21:09:16,196 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:16,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013332510] [2022-03-20 21:09:16,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013332510] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:16,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:16,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-20 21:09:16,197 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:16,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1038944039] [2022-03-20 21:09:16,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1038944039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:16,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:16,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 21:09:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273186470] [2022-03-20 21:09:16,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:16,197 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 21:09:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:16,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 21:09:16,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:16,198 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 21:09:16,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:16,618 INFO L93 Difference]: Finished difference Result 250 states and 276 transitions. [2022-03-20 21:09:16,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 21:09:16,618 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2022-03-20 21:09:16,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:16,619 INFO L225 Difference]: With dead ends: 250 [2022-03-20 21:09:16,619 INFO L226 Difference]: Without dead ends: 245 [2022-03-20 21:09:16,620 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 21:09:16,621 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 107 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:16,621 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 274 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:16,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-20 21:09:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-20 21:09:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 21:09:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2022-03-20 21:09:16,654 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2022-03-20 21:09:16,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:16,654 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2022-03-20 21:09:16,654 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 21:09:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2022-03-20 21:09:16,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-20 21:09:16,655 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:16,655 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:16,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 21:09:16,863 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 21:09:16,863 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:16,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:16,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 49 times [2022-03-20 21:09:16,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:16,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1803832344] [2022-03-20 21:09:16,864 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 50 times [2022-03-20 21:09:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:16,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17511532] [2022-03-20 21:09:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:16,873 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:16,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872090073] [2022-03-20 21:09:16,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:09:16,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:16,877 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 21:09:16,882 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 21:09:16,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:09:16,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 21:09:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:17,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 1550 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2022-03-20 21:09:18,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17511532] [2022-03-20 21:09:18,491 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872090073] [2022-03-20 21:09:18,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872090073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:18,491 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:18,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 54 [2022-03-20 21:09:18,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1803832344] [2022-03-20 21:09:18,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1803832344] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:18,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:18,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 21:09:18,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418223550] [2022-03-20 21:09:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:18,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 21:09:18,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:18,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 21:09:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:18,493 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 21:09:18,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:18,933 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2022-03-20 21:09:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 21:09:18,934 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2022-03-20 21:09:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:18,935 INFO L225 Difference]: With dead ends: 259 [2022-03-20 21:09:18,935 INFO L226 Difference]: Without dead ends: 254 [2022-03-20 21:09:18,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 442 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2656, Invalid=3506, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 21:09:18,936 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 105 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:18,936 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 282 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:18,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-20 21:09:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-20 21:09:18,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 21:09:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2022-03-20 21:09:18,957 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2022-03-20 21:09:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:18,957 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2022-03-20 21:09:18,957 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 21:09:18,958 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2022-03-20 21:09:18,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-20 21:09:18,958 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:18,958 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:18,977 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 21:09:19,171 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 21:09:19,171 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 51 times [2022-03-20 21:09:19,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:19,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [919410175] [2022-03-20 21:09:19,172 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 52 times [2022-03-20 21:09:19,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:19,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760560337] [2022-03-20 21:09:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:19,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:19,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:19,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480084254] [2022-03-20 21:09:19,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:09:19,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:19,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:19,180 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 21:09:19,181 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 21:09:19,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:09:19,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:19,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 21:09:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:20,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:20,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 1677 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2022-03-20 21:09:21,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:21,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760560337] [2022-03-20 21:09:21,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:21,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480084254] [2022-03-20 21:09:21,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480084254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:21,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:21,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 54 [2022-03-20 21:09:21,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [919410175] [2022-03-20 21:09:21,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [919410175] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:21,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:21,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 21:09:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077112570] [2022-03-20 21:09:21,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:21,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 21:09:21,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:21,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 21:09:21,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:21,068 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 21:09:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:21,550 INFO L93 Difference]: Finished difference Result 268 states and 296 transitions. [2022-03-20 21:09:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 21:09:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2022-03-20 21:09:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:21,552 INFO L225 Difference]: With dead ends: 268 [2022-03-20 21:09:21,552 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 21:09:21,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 460 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=3611, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 21:09:21,554 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 108 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:21,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 284 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 21:09:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-20 21:09:21,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 21:09:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-20 21:09:21,583 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2022-03-20 21:09:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:21,584 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-20 21:09:21,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 21:09:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-20 21:09:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-03-20 21:09:21,585 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:21,585 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:21,613 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 21:09:21,790 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 21:09:21,791 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 53 times [2022-03-20 21:09:21,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:21,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133010776] [2022-03-20 21:09:21,792 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 54 times [2022-03-20 21:09:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:21,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303461593] [2022-03-20 21:09:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:21,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:21,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:21,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400669348] [2022-03-20 21:09:21,800 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:09:21,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:21,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:21,802 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 21:09:21,803 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 21:09:29,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 21:09:29,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:29,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 21:09:29,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:29,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:29,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 1809 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-20 21:09:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:30,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303461593] [2022-03-20 21:09:30,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400669348] [2022-03-20 21:09:30,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400669348] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:30,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:30,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 54 [2022-03-20 21:09:30,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:30,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133010776] [2022-03-20 21:09:30,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133010776] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:30,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:30,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 21:09:30,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691195400] [2022-03-20 21:09:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:30,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 21:09:30,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 21:09:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:30,731 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 21:09:31,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:31,061 INFO L93 Difference]: Finished difference Result 277 states and 306 transitions. [2022-03-20 21:09:31,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 21:09:31,061 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2022-03-20 21:09:31,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:31,083 INFO L225 Difference]: With dead ends: 277 [2022-03-20 21:09:31,084 INFO L226 Difference]: Without dead ends: 272 [2022-03-20 21:09:31,084 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 478 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2762, Invalid=3718, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 21:09:31,085 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 135 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:31,085 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 298 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:31,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-20 21:09:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-03-20 21:09:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 21:09:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2022-03-20 21:09:31,118 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2022-03-20 21:09:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:31,119 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2022-03-20 21:09:31,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 21:09:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2022-03-20 21:09:31,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-20 21:09:31,126 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:31,126 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:31,135 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 21:09:31,334 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 21:09:31,334 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:31,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:31,334 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 55 times [2022-03-20 21:09:31,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:31,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [659400483] [2022-03-20 21:09:31,335 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:31,335 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 56 times [2022-03-20 21:09:31,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:31,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166692601] [2022-03-20 21:09:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:31,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:31,343 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:31,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320298854] [2022-03-20 21:09:31,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:09:31,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:31,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:31,349 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 21:09:31,350 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 21:09:31,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:09:31,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:31,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 21:09:31,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:32,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 1946 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-03-20 21:09:32,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:32,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166692601] [2022-03-20 21:09:32,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:32,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320298854] [2022-03-20 21:09:32,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320298854] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:32,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:32,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 54 [2022-03-20 21:09:32,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:32,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [659400483] [2022-03-20 21:09:32,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [659400483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:32,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:32,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 21:09:32,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017669072] [2022-03-20 21:09:32,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:32,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 21:09:32,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:32,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 21:09:32,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:32,767 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 21:09:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:33,127 INFO L93 Difference]: Finished difference Result 286 states and 316 transitions. [2022-03-20 21:09:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 21:09:33,128 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2022-03-20 21:09:33,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:33,129 INFO L225 Difference]: With dead ends: 286 [2022-03-20 21:09:33,129 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 21:09:33,130 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 496 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2815, Invalid=3827, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 21:09:33,130 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 104 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:33,131 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 306 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 21:09:33,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-20 21:09:33,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 21:09:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2022-03-20 21:09:33,159 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2022-03-20 21:09:33,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:33,159 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2022-03-20 21:09:33,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 21:09:33,159 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2022-03-20 21:09:33,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-03-20 21:09:33,160 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:33,160 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:33,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 21:09:33,373 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 21:09:33,374 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:33,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:33,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 57 times [2022-03-20 21:09:33,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:33,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1695834930] [2022-03-20 21:09:33,375 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:33,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 58 times [2022-03-20 21:09:33,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:33,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675445989] [2022-03-20 21:09:33,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:33,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:33,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:33,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1650057558] [2022-03-20 21:09:33,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:09:33,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:33,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:33,383 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 21:09:33,384 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 21:09:34,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:09:34,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:34,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 21:09:34,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:34,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:35,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 2088 refuted. 0 times theorem prover too weak. 1628 trivial. 0 not checked. [2022-03-20 21:09:35,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675445989] [2022-03-20 21:09:35,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650057558] [2022-03-20 21:09:35,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650057558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:35,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:35,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 54 [2022-03-20 21:09:35,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:35,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1695834930] [2022-03-20 21:09:35,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1695834930] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:35,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:35,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 21:09:35,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502851855] [2022-03-20 21:09:35,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:35,235 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 21:09:35,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:35,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 21:09:35,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:35,237 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 21:09:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:35,779 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2022-03-20 21:09:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 21:09:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2022-03-20 21:09:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:35,781 INFO L225 Difference]: With dead ends: 295 [2022-03-20 21:09:35,781 INFO L226 Difference]: Without dead ends: 290 [2022-03-20 21:09:35,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 514 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2868, Invalid=3938, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 21:09:35,782 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 139 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:35,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 302 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-20 21:09:35,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-03-20 21:09:35,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 21:09:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2022-03-20 21:09:35,852 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2022-03-20 21:09:35,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:35,852 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2022-03-20 21:09:35,852 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 21:09:35,852 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2022-03-20 21:09:35,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-20 21:09:35,854 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:35,854 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:35,860 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 21:09:36,059 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 21:09:36,060 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:36,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:36,060 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 59 times [2022-03-20 21:09:36,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:36,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1765534378] [2022-03-20 21:09:36,061 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 60 times [2022-03-20 21:09:36,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:36,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189210057] [2022-03-20 21:09:36,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:36,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:36,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:36,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744313362] [2022-03-20 21:09:36,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:09:36,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:36,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:36,076 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 21:09:36,077 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 21:09:41,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 21:09:41,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:41,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 21:09:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:41,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 2235 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-20 21:09:42,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:42,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189210057] [2022-03-20 21:09:42,634 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:42,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744313362] [2022-03-20 21:09:42,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744313362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:42,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:42,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 54 [2022-03-20 21:09:42,635 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:42,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1765534378] [2022-03-20 21:09:42,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1765534378] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:42,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:42,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 21:09:42,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213097842] [2022-03-20 21:09:42,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:42,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 21:09:42,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:42,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 21:09:42,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:42,636 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 21:09:43,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:43,175 INFO L93 Difference]: Finished difference Result 304 states and 336 transitions. [2022-03-20 21:09:43,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 21:09:43,175 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2022-03-20 21:09:43,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:43,176 INFO L225 Difference]: With dead ends: 304 [2022-03-20 21:09:43,176 INFO L226 Difference]: Without dead ends: 299 [2022-03-20 21:09:43,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 532 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2921, Invalid=4051, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 21:09:43,178 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 116 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:43,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 310 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:09:43,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-20 21:09:43,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-20 21:09:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 21:09:43,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2022-03-20 21:09:43,201 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2022-03-20 21:09:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:43,201 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2022-03-20 21:09:43,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 21:09:43,202 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2022-03-20 21:09:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-20 21:09:43,203 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:43,203 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:43,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 21:09:43,409 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 21:09:43,409 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 61 times [2022-03-20 21:09:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:43,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1519795408] [2022-03-20 21:09:43,410 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 62 times [2022-03-20 21:09:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:43,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383686212] [2022-03-20 21:09:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:43,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:43,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:43,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949155513] [2022-03-20 21:09:43,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:09:43,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:43,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:43,418 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 21:09:43,430 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 21:09:43,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:09:43,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:43,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 21:09:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:44,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 2387 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2022-03-20 21:09:45,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:45,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383686212] [2022-03-20 21:09:45,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:45,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949155513] [2022-03-20 21:09:45,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949155513] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:45,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:45,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 54 [2022-03-20 21:09:45,050 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:45,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1519795408] [2022-03-20 21:09:45,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1519795408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:45,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:45,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 21:09:45,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398914790] [2022-03-20 21:09:45,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:45,051 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 21:09:45,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:45,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 21:09:45,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:45,052 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 21:09:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:45,488 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2022-03-20 21:09:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 21:09:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2022-03-20 21:09:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:45,489 INFO L225 Difference]: With dead ends: 313 [2022-03-20 21:09:45,489 INFO L226 Difference]: Without dead ends: 308 [2022-03-20 21:09:45,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 550 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2974, Invalid=4166, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 21:09:45,491 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:45,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 330 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:45,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-20 21:09:45,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-03-20 21:09:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 21:09:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2022-03-20 21:09:45,518 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2022-03-20 21:09:45,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:45,518 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2022-03-20 21:09:45,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 21:09:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2022-03-20 21:09:45,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-20 21:09:45,519 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:45,519 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:45,538 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 21:09:45,733 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 21:09:45,733 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:45,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 63 times [2022-03-20 21:09:45,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:45,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2007194187] [2022-03-20 21:09:45,734 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 64 times [2022-03-20 21:09:45,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:45,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562791511] [2022-03-20 21:09:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:45,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:45,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [876344896] [2022-03-20 21:09:45,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:09:45,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:45,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:45,743 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 21:09:45,744 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 21:09:46,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:09:46,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:09:46,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 21:09:46,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:09:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:09:46,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:09:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 2544 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2022-03-20 21:09:47,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:09:47,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562791511] [2022-03-20 21:09:47,734 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:09:47,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876344896] [2022-03-20 21:09:47,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876344896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:09:47,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:09:47,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 54 [2022-03-20 21:09:47,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:09:47,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2007194187] [2022-03-20 21:09:47,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2007194187] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:09:47,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:09:47,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 21:09:47,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873864777] [2022-03-20 21:09:47,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:09:47,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 21:09:47,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:47,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 21:09:47,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:09:47,736 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 21:09:48,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:09:48,251 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-03-20 21:09:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 21:09:48,251 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2022-03-20 21:09:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:09:48,263 INFO L225 Difference]: With dead ends: 322 [2022-03-20 21:09:48,263 INFO L226 Difference]: Without dead ends: 317 [2022-03-20 21:09:48,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 568 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3027, Invalid=4283, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 21:09:48,264 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 118 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:09:48,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 344 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:09:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-20 21:09:48,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-03-20 21:09:48,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 21:09:48,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2022-03-20 21:09:48,294 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2022-03-20 21:09:48,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:09:48,294 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2022-03-20 21:09:48,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 21:09:48,295 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2022-03-20 21:09:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-20 21:09:48,296 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:09:48,296 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:09:48,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 21:09:48,500 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 21:09:48,500 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:09:48,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:09:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 65 times [2022-03-20 21:09:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:09:48,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [748048140] [2022-03-20 21:09:48,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:09:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 66 times [2022-03-20 21:09:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:09:48,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600429104] [2022-03-20 21:09:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:09:48,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:09:48,508 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:09:48,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900743964] [2022-03-20 21:09:48,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:09:48,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:09:48,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:09:48,528 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 21:09:48,529 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 21:14:55,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 21:14:55,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:14:55,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 21:14:55,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:14:56,267 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 4818 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:14:56,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:14:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 2706 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-20 21:14:57,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:14:57,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600429104] [2022-03-20 21:14:57,009 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:14:57,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900743964] [2022-03-20 21:14:57,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900743964] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:14:57,009 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:14:57,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2022-03-20 21:14:57,009 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:14:57,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [748048140] [2022-03-20 21:14:57,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [748048140] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:14:57,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:14:57,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 21:14:57,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926352224] [2022-03-20 21:14:57,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:14:57,010 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 21:14:57,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:57,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 21:14:57,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:14:57,012 INFO L87 Difference]: Start difference. First operand 317 states and 351 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 21:14:57,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:14:57,513 INFO L93 Difference]: Finished difference Result 331 states and 366 transitions. [2022-03-20 21:14:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 21:14:57,514 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) Word has length 320 [2022-03-20 21:14:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:14:57,515 INFO L225 Difference]: With dead ends: 331 [2022-03-20 21:14:57,515 INFO L226 Difference]: Without dead ends: 326 [2022-03-20 21:14:57,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 586 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3080, Invalid=4402, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 21:14:57,516 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 195 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:14:57,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 340 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:14:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-20 21:14:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-03-20 21:14:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 250 states have (on average 1.14) internal successors, (285), 250 states have internal predecessors, (285), 39 states have call successors, (39), 38 states have call predecessors, (39), 36 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 21:14:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 361 transitions. [2022-03-20 21:14:57,541 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 361 transitions. Word has length 320 [2022-03-20 21:14:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:14:57,541 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 361 transitions. [2022-03-20 21:14:57,541 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 21:14:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 361 transitions. [2022-03-20 21:14:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-03-20 21:14:57,542 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:14:57,542 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:14:57,579 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 21:14:57,751 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 21:14:57,751 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:14:57,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:14:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 67 times [2022-03-20 21:14:57,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:57,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1223254193] [2022-03-20 21:14:57,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:14:57,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 68 times [2022-03-20 21:14:57,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:14:57,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011012087] [2022-03-20 21:14:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:14:57,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:14:57,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:14:57,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111139297] [2022-03-20 21:14:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:14:57,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:14:57,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:14:57,761 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 21:14:57,761 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 21:14:57,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:14:57,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:14:57,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 21:14:57,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:14:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 5117 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:14:58,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:14:59,270 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 2873 refuted. 0 times theorem prover too weak. 2248 trivial. 0 not checked. [2022-03-20 21:14:59,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:14:59,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011012087] [2022-03-20 21:14:59,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:14:59,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111139297] [2022-03-20 21:14:59,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111139297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:14:59,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:14:59,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 54 [2022-03-20 21:14:59,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:14:59,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1223254193] [2022-03-20 21:14:59,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1223254193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:14:59,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:14:59,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 21:14:59,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108710849] [2022-03-20 21:14:59,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:14:59,272 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 21:14:59,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:14:59,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 21:14:59,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:14:59,273 INFO L87 Difference]: Start difference. First operand 326 states and 361 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 21:14:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:14:59,941 INFO L93 Difference]: Finished difference Result 340 states and 376 transitions. [2022-03-20 21:14:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 21:14:59,941 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) Word has length 329 [2022-03-20 21:14:59,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:14:59,943 INFO L225 Difference]: With dead ends: 340 [2022-03-20 21:14:59,943 INFO L226 Difference]: Without dead ends: 335 [2022-03-20 21:14:59,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 604 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3133, Invalid=4523, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 21:14:59,944 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 146 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:14:59,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 348 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:14:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-20 21:14:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-03-20 21:14:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 257 states have (on average 1.140077821011673) internal successors, (293), 257 states have internal predecessors, (293), 40 states have call successors, (40), 39 states have call predecessors, (40), 37 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 21:14:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2022-03-20 21:14:59,971 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 329 [2022-03-20 21:14:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:14:59,971 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2022-03-20 21:14:59,971 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 21:14:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2022-03-20 21:14:59,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-03-20 21:14:59,972 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:14:59,972 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:14:59,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 21:15:00,182 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 21:15:00,183 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:00,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 69 times [2022-03-20 21:15:00,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:00,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1961377492] [2022-03-20 21:15:00,184 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 70 times [2022-03-20 21:15:00,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:00,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694567111] [2022-03-20 21:15:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:00,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:00,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:00,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308942760] [2022-03-20 21:15:00,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:15:00,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:00,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:00,192 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 21:15:00,193 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 21:15:00,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:15:00,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:00,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 21:15:00,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 5425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:01,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 3045 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2022-03-20 21:15:02,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694567111] [2022-03-20 21:15:02,013 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:02,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308942760] [2022-03-20 21:15:02,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308942760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:02,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:02,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 54 [2022-03-20 21:15:02,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:02,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1961377492] [2022-03-20 21:15:02,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1961377492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:02,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:02,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 21:15:02,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311486732] [2022-03-20 21:15:02,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:02,014 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 21:15:02,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:02,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 21:15:02,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:02,015 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 21:15:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:02,687 INFO L93 Difference]: Finished difference Result 349 states and 386 transitions. [2022-03-20 21:15:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 21:15:02,687 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) Word has length 338 [2022-03-20 21:15:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:02,689 INFO L225 Difference]: With dead ends: 349 [2022-03-20 21:15:02,689 INFO L226 Difference]: Without dead ends: 344 [2022-03-20 21:15:02,689 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 622 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3186, Invalid=4646, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 21:15:02,689 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 125 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:02,690 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 356 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:02,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-20 21:15:02,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-03-20 21:15:02,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 264 states have (on average 1.1401515151515151) internal successors, (301), 264 states have internal predecessors, (301), 41 states have call successors, (41), 40 states have call predecessors, (41), 38 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 21:15:02,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 381 transitions. [2022-03-20 21:15:02,716 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 381 transitions. Word has length 338 [2022-03-20 21:15:02,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:02,716 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 381 transitions. [2022-03-20 21:15:02,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 21:15:02,716 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 381 transitions. [2022-03-20 21:15:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-03-20 21:15:02,718 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:02,718 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:02,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 21:15:02,937 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 21:15:02,938 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 71 times [2022-03-20 21:15:02,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:02,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1086597736] [2022-03-20 21:15:02,938 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 72 times [2022-03-20 21:15:02,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:02,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456661538] [2022-03-20 21:15:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:02,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:02,945 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:02,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913169541] [2022-03-20 21:15:02,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:15:02,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:02,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:02,947 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 21:15:02,949 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 21:15:05,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 21:15:05,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 21:15:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:06,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 5742 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:06,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 3222 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-20 21:15:06,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:06,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456661538] [2022-03-20 21:15:06,909 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:06,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913169541] [2022-03-20 21:15:06,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913169541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:06,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:06,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 54 [2022-03-20 21:15:06,910 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:06,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1086597736] [2022-03-20 21:15:06,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1086597736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:06,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:06,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 21:15:06,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896262117] [2022-03-20 21:15:06,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:06,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 21:15:06,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 21:15:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:06,912 INFO L87 Difference]: Start difference. First operand 344 states and 381 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 21:15:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:07,444 INFO L93 Difference]: Finished difference Result 358 states and 396 transitions. [2022-03-20 21:15:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 21:15:07,444 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) Word has length 347 [2022-03-20 21:15:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:07,460 INFO L225 Difference]: With dead ends: 358 [2022-03-20 21:15:07,460 INFO L226 Difference]: Without dead ends: 353 [2022-03-20 21:15:07,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 640 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3239, Invalid=4771, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 21:15:07,461 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 116 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:07,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 388 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:15:07,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-20 21:15:07,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-03-20 21:15:07,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 271 states have (on average 1.1402214022140222) internal successors, (309), 271 states have internal predecessors, (309), 42 states have call successors, (42), 41 states have call predecessors, (42), 39 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 21:15:07,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 391 transitions. [2022-03-20 21:15:07,502 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 391 transitions. Word has length 347 [2022-03-20 21:15:07,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:07,502 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 391 transitions. [2022-03-20 21:15:07,502 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 21:15:07,502 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 391 transitions. [2022-03-20 21:15:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-20 21:15:07,503 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:07,504 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:07,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-20 21:15:07,710 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 21:15:07,711 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 73 times [2022-03-20 21:15:07,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:07,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1661531318] [2022-03-20 21:15:07,711 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:07,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 74 times [2022-03-20 21:15:07,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:07,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036704597] [2022-03-20 21:15:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:07,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:07,719 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:07,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877845006] [2022-03-20 21:15:07,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:15:07,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:07,720 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 21:15:07,722 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 21:15:07,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:15:07,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:07,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 21:15:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 6068 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:08,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 3404 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2022-03-20 21:15:09,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036704597] [2022-03-20 21:15:09,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:09,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877845006] [2022-03-20 21:15:09,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877845006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:09,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:09,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 54 [2022-03-20 21:15:09,496 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1661531318] [2022-03-20 21:15:09,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1661531318] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:09,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:09,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 21:15:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765962573] [2022-03-20 21:15:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:09,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 21:15:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:09,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 21:15:09,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:09,498 INFO L87 Difference]: Start difference. First operand 353 states and 391 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 21:15:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:09,986 INFO L93 Difference]: Finished difference Result 367 states and 406 transitions. [2022-03-20 21:15:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 21:15:09,986 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) Word has length 356 [2022-03-20 21:15:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:09,988 INFO L225 Difference]: With dead ends: 367 [2022-03-20 21:15:09,988 INFO L226 Difference]: Without dead ends: 362 [2022-03-20 21:15:09,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 658 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3292, Invalid=4898, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 21:15:09,989 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 147 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:09,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 378 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 21:15:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-20 21:15:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-03-20 21:15:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 278 states have internal predecessors, (317), 43 states have call successors, (43), 42 states have call predecessors, (43), 40 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 21:15:10,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 401 transitions. [2022-03-20 21:15:10,042 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 401 transitions. Word has length 356 [2022-03-20 21:15:10,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:10,042 INFO L478 AbstractCegarLoop]: Abstraction has 362 states and 401 transitions. [2022-03-20 21:15:10,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 21:15:10,042 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 401 transitions. [2022-03-20 21:15:10,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-20 21:15:10,044 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:10,044 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:10,065 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 21:15:10,261 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 21:15:10,262 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:10,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:10,262 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 75 times [2022-03-20 21:15:10,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:10,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [203911360] [2022-03-20 21:15:10,262 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:10,262 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 76 times [2022-03-20 21:15:10,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:10,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153796007] [2022-03-20 21:15:10,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:10,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:10,278 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:10,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946528357] [2022-03-20 21:15:10,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:15:10,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:10,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:10,279 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 21:15:10,280 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 21:15:10,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:15:10,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:10,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 21:15:10,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 6403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:11,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 3591 refuted. 0 times theorem prover too weak. 2816 trivial. 0 not checked. [2022-03-20 21:15:11,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153796007] [2022-03-20 21:15:11,883 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946528357] [2022-03-20 21:15:11,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946528357] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:11,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:11,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 54 [2022-03-20 21:15:11,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:11,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [203911360] [2022-03-20 21:15:11,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [203911360] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:11,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:11,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 21:15:11,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109570575] [2022-03-20 21:15:11,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:11,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 21:15:11,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:11,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 21:15:11,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:11,884 INFO L87 Difference]: Start difference. First operand 362 states and 401 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 21:15:12,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:12,457 INFO L93 Difference]: Finished difference Result 376 states and 416 transitions. [2022-03-20 21:15:12,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 21:15:12,457 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) Word has length 365 [2022-03-20 21:15:12,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:12,459 INFO L225 Difference]: With dead ends: 376 [2022-03-20 21:15:12,459 INFO L226 Difference]: Without dead ends: 371 [2022-03-20 21:15:12,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 676 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=3345, Invalid=5027, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 21:15:12,462 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 150 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:12,463 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 380 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:12,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-20 21:15:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-03-20 21:15:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.1403508771929824) internal successors, (325), 285 states have internal predecessors, (325), 44 states have call successors, (44), 43 states have call predecessors, (44), 41 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 21:15:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 411 transitions. [2022-03-20 21:15:12,500 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 411 transitions. Word has length 365 [2022-03-20 21:15:12,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:12,501 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 411 transitions. [2022-03-20 21:15:12,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 21:15:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 411 transitions. [2022-03-20 21:15:12,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-03-20 21:15:12,502 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:12,502 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:12,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 21:15:12,711 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 21:15:12,711 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:12,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 77 times [2022-03-20 21:15:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:12,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1103889540] [2022-03-20 21:15:12,712 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:12,712 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 78 times [2022-03-20 21:15:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:12,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819789099] [2022-03-20 21:15:12,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:12,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:12,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:12,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1892553639] [2022-03-20 21:15:12,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:15:12,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:12,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:12,721 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 21:15:12,722 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 21:15:16,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-20 21:15:16,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:16,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 21:15:16,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:17,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 6747 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:17,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:18,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 3783 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-20 21:15:18,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819789099] [2022-03-20 21:15:18,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:18,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892553639] [2022-03-20 21:15:18,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892553639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:18,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:18,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 54 [2022-03-20 21:15:18,048 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:18,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1103889540] [2022-03-20 21:15:18,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1103889540] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:18,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:18,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 21:15:18,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121260493] [2022-03-20 21:15:18,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:18,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 21:15:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 21:15:18,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:18,049 INFO L87 Difference]: Start difference. First operand 371 states and 411 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-20 21:15:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:18,656 INFO L93 Difference]: Finished difference Result 385 states and 426 transitions. [2022-03-20 21:15:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 21:15:18,656 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) Word has length 374 [2022-03-20 21:15:18,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:18,657 INFO L225 Difference]: With dead ends: 385 [2022-03-20 21:15:18,657 INFO L226 Difference]: Without dead ends: 380 [2022-03-20 21:15:18,658 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 694 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3398, Invalid=5158, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 21:15:18,658 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 216 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:18,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 376 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:18,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-20 21:15:18,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-03-20 21:15:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 292 states have internal predecessors, (333), 45 states have call successors, (45), 44 states have call predecessors, (45), 42 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 21:15:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 421 transitions. [2022-03-20 21:15:18,704 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 421 transitions. Word has length 374 [2022-03-20 21:15:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:18,704 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 421 transitions. [2022-03-20 21:15:18,705 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-20 21:15:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 421 transitions. [2022-03-20 21:15:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-03-20 21:15:18,706 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:18,706 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:18,714 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 21:15:18,914 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 21:15:18,914 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:18,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:18,914 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 79 times [2022-03-20 21:15:18,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:18,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1100979918] [2022-03-20 21:15:18,915 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 80 times [2022-03-20 21:15:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987479950] [2022-03-20 21:15:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:18,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:18,922 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:18,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1621820984] [2022-03-20 21:15:18,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:15:18,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:18,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:18,923 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 21:15:18,939 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 21:15:19,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:15:19,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:19,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 21:15:19,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 7100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:19,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 3980 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-03-20 21:15:20,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987479950] [2022-03-20 21:15:20,306 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621820984] [2022-03-20 21:15:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621820984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:20,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:20,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 54 [2022-03-20 21:15:20,306 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:20,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1100979918] [2022-03-20 21:15:20,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1100979918] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:20,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:20,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 21:15:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326410339] [2022-03-20 21:15:20,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:20,307 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 21:15:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 21:15:20,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:20,308 INFO L87 Difference]: Start difference. First operand 380 states and 421 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-20 21:15:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:20,890 INFO L93 Difference]: Finished difference Result 394 states and 436 transitions. [2022-03-20 21:15:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 21:15:20,890 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) Word has length 383 [2022-03-20 21:15:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:20,892 INFO L225 Difference]: With dead ends: 394 [2022-03-20 21:15:20,892 INFO L226 Difference]: Without dead ends: 389 [2022-03-20 21:15:20,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 712 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 878 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3451, Invalid=5291, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 21:15:20,893 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 153 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:20,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 402 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-20 21:15:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-03-20 21:15:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 299 states have (on average 1.140468227424749) internal successors, (341), 299 states have internal predecessors, (341), 46 states have call successors, (46), 45 states have call predecessors, (46), 43 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 21:15:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 431 transitions. [2022-03-20 21:15:20,925 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 431 transitions. Word has length 383 [2022-03-20 21:15:20,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:20,925 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 431 transitions. [2022-03-20 21:15:20,926 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-20 21:15:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 431 transitions. [2022-03-20 21:15:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-03-20 21:15:20,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:20,927 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:20,951 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 21:15:21,145 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 21:15:21,145 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:21,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:21,145 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 81 times [2022-03-20 21:15:21,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:21,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1183118043] [2022-03-20 21:15:21,146 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:21,146 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 82 times [2022-03-20 21:15:21,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:21,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23552757] [2022-03-20 21:15:21,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:21,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:21,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:21,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1232121342] [2022-03-20 21:15:21,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:15:21,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:21,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:21,169 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 21:15:21,171 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 21:15:21,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:15:21,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:21,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 21:15:21,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 7462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:22,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 4182 refuted. 0 times theorem prover too weak. 3284 trivial. 0 not checked. [2022-03-20 21:15:23,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23552757] [2022-03-20 21:15:23,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:23,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232121342] [2022-03-20 21:15:23,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232121342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:23,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:23,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 54 [2022-03-20 21:15:23,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:23,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1183118043] [2022-03-20 21:15:23,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1183118043] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:23,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:23,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 21:15:23,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746150820] [2022-03-20 21:15:23,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:23,207 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 21:15:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 21:15:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:23,208 INFO L87 Difference]: Start difference. First operand 389 states and 431 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-20 21:15:23,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:23,997 INFO L93 Difference]: Finished difference Result 403 states and 446 transitions. [2022-03-20 21:15:23,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 21:15:23,997 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) Word has length 392 [2022-03-20 21:15:23,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:23,998 INFO L225 Difference]: With dead ends: 403 [2022-03-20 21:15:23,998 INFO L226 Difference]: Without dead ends: 398 [2022-03-20 21:15:23,999 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 730 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3504, Invalid=5426, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 21:15:23,999 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 115 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:23,999 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 428 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:23,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-20 21:15:24,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-03-20 21:15:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 306 states have internal predecessors, (349), 47 states have call successors, (47), 46 states have call predecessors, (47), 44 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-20 21:15:24,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 441 transitions. [2022-03-20 21:15:24,031 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 441 transitions. Word has length 392 [2022-03-20 21:15:24,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:24,032 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 441 transitions. [2022-03-20 21:15:24,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-20 21:15:24,032 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 441 transitions. [2022-03-20 21:15:24,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-03-20 21:15:24,033 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:24,033 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:24,043 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 21:15:24,240 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 21:15:24,240 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:24,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:24,240 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 83 times [2022-03-20 21:15:24,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:24,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [323774833] [2022-03-20 21:15:24,241 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 84 times [2022-03-20 21:15:24,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:24,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653737754] [2022-03-20 21:15:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:24,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:24,248 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:24,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409822177] [2022-03-20 21:15:24,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:15:24,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:24,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:24,250 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 21:15:24,251 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 21:15:31,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-20 21:15:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:31,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 21:15:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 7833 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:32,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 4389 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-20 21:15:33,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:33,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653737754] [2022-03-20 21:15:33,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409822177] [2022-03-20 21:15:33,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409822177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:33,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:33,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 54 [2022-03-20 21:15:33,503 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:33,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [323774833] [2022-03-20 21:15:33,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [323774833] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:33,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:33,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 21:15:33,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379464526] [2022-03-20 21:15:33,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:33,504 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 21:15:33,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 21:15:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:33,504 INFO L87 Difference]: Start difference. First operand 398 states and 441 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-20 21:15:34,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:34,206 INFO L93 Difference]: Finished difference Result 412 states and 456 transitions. [2022-03-20 21:15:34,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 21:15:34,207 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) Word has length 401 [2022-03-20 21:15:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:34,208 INFO L225 Difference]: With dead ends: 412 [2022-03-20 21:15:34,208 INFO L226 Difference]: Without dead ends: 407 [2022-03-20 21:15:34,209 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 748 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3557, Invalid=5563, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 21:15:34,209 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 132 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:34,209 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 424 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:34,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-20 21:15:34,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-03-20 21:15:34,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 313 states have (on average 1.1405750798722045) internal successors, (357), 313 states have internal predecessors, (357), 48 states have call successors, (48), 47 states have call predecessors, (48), 45 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 21:15:34,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 451 transitions. [2022-03-20 21:15:34,243 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 451 transitions. Word has length 401 [2022-03-20 21:15:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:34,244 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 451 transitions. [2022-03-20 21:15:34,244 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-20 21:15:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 451 transitions. [2022-03-20 21:15:34,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-03-20 21:15:34,246 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:34,246 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:34,271 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 21:15:34,455 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 21:15:34,455 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:34,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 85 times [2022-03-20 21:15:34,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:34,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1434033721] [2022-03-20 21:15:34,456 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:34,456 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 86 times [2022-03-20 21:15:34,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:34,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547124791] [2022-03-20 21:15:34,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:34,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:34,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:34,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [755745840] [2022-03-20 21:15:34,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:15:34,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:34,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:34,465 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 21:15:34,466 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 21:15:34,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:15:34,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:34,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 21:15:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 8213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:35,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 4601 refuted. 0 times theorem prover too weak. 3616 trivial. 0 not checked. [2022-03-20 21:15:36,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547124791] [2022-03-20 21:15:36,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:36,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755745840] [2022-03-20 21:15:36,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755745840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:36,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:36,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 54 [2022-03-20 21:15:36,633 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:36,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1434033721] [2022-03-20 21:15:36,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1434033721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:36,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:36,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 21:15:36,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625868394] [2022-03-20 21:15:36,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:36,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 21:15:36,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:36,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 21:15:36,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:36,635 INFO L87 Difference]: Start difference. First operand 407 states and 451 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-20 21:15:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:37,332 INFO L93 Difference]: Finished difference Result 421 states and 466 transitions. [2022-03-20 21:15:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 21:15:37,332 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) Word has length 410 [2022-03-20 21:15:37,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:37,334 INFO L225 Difference]: With dead ends: 421 [2022-03-20 21:15:37,334 INFO L226 Difference]: Without dead ends: 416 [2022-03-20 21:15:37,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 766 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3610, Invalid=5702, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 21:15:37,335 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 176 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:37,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 420 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:37,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-20 21:15:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-03-20 21:15:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 320 states have (on average 1.140625) internal successors, (365), 320 states have internal predecessors, (365), 49 states have call successors, (49), 48 states have call predecessors, (49), 46 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 21:15:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 461 transitions. [2022-03-20 21:15:37,376 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 461 transitions. Word has length 410 [2022-03-20 21:15:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:37,377 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 461 transitions. [2022-03-20 21:15:37,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-20 21:15:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 461 transitions. [2022-03-20 21:15:37,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-03-20 21:15:37,379 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:37,379 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:37,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 21:15:37,602 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 21:15:37,602 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:37,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 87 times [2022-03-20 21:15:37,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:37,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1533827742] [2022-03-20 21:15:37,603 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:37,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 88 times [2022-03-20 21:15:37,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:37,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766324681] [2022-03-20 21:15:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:37,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:37,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:37,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539599687] [2022-03-20 21:15:37,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:15:37,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:37,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:37,616 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 21:15:37,617 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 21:15:37,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:15:37,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:37,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 21:15:37,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 8602 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:38,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 4818 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2022-03-20 21:15:39,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:39,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766324681] [2022-03-20 21:15:39,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:39,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539599687] [2022-03-20 21:15:39,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539599687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:39,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:39,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 54 [2022-03-20 21:15:39,253 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:39,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1533827742] [2022-03-20 21:15:39,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1533827742] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:39,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:39,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 21:15:39,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720011020] [2022-03-20 21:15:39,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:39,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 21:15:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 21:15:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:39,255 INFO L87 Difference]: Start difference. First operand 416 states and 461 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-20 21:15:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:39,965 INFO L93 Difference]: Finished difference Result 430 states and 476 transitions. [2022-03-20 21:15:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 21:15:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) Word has length 419 [2022-03-20 21:15:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:39,971 INFO L225 Difference]: With dead ends: 430 [2022-03-20 21:15:39,971 INFO L226 Difference]: Without dead ends: 425 [2022-03-20 21:15:39,973 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 784 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=3663, Invalid=5843, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 21:15:39,973 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:39,973 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 446 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:39,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-20 21:15:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-03-20 21:15:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 327 states have (on average 1.1406727828746177) internal successors, (373), 327 states have internal predecessors, (373), 50 states have call successors, (50), 49 states have call predecessors, (50), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-20 21:15:40,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2022-03-20 21:15:40,060 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 419 [2022-03-20 21:15:40,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:40,060 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2022-03-20 21:15:40,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-20 21:15:40,061 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2022-03-20 21:15:40,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-20 21:15:40,077 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:40,077 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:40,085 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 21:15:40,277 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 21:15:40,277 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:40,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:40,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 89 times [2022-03-20 21:15:40,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:40,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636220622] [2022-03-20 21:15:40,278 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:40,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 90 times [2022-03-20 21:15:40,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:40,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937105046] [2022-03-20 21:15:40,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:40,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:40,288 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:40,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [238803679] [2022-03-20 21:15:40,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:15:40,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:40,289 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 21:15:40,303 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 21:15:46,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-20 21:15:46,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 21:15:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 9000 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:47,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 5040 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-20 21:15:48,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:48,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937105046] [2022-03-20 21:15:48,099 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:48,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238803679] [2022-03-20 21:15:48,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238803679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:48,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:48,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 54 [2022-03-20 21:15:48,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:48,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636220622] [2022-03-20 21:15:48,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636220622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:48,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:48,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 21:15:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886221805] [2022-03-20 21:15:48,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:48,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 21:15:48,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 21:15:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:48,101 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-20 21:15:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:48,857 INFO L93 Difference]: Finished difference Result 439 states and 486 transitions. [2022-03-20 21:15:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 21:15:48,857 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 428 [2022-03-20 21:15:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:48,859 INFO L225 Difference]: With dead ends: 439 [2022-03-20 21:15:48,859 INFO L226 Difference]: Without dead ends: 434 [2022-03-20 21:15:48,859 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 802 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3716, Invalid=5986, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 21:15:48,860 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 176 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:48,871 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 454 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-20 21:15:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-20 21:15:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 21:15:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-20 21:15:48,909 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 428 [2022-03-20 21:15:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:48,909 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-20 21:15:48,910 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-20 21:15:48,910 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-20 21:15:48,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-20 21:15:48,911 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:48,912 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:48,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 21:15:49,119 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 21:15:49,120 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:49,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:49,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 91 times [2022-03-20 21:15:49,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:49,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1804885761] [2022-03-20 21:15:49,120 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:49,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 92 times [2022-03-20 21:15:49,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:49,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433399462] [2022-03-20 21:15:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:49,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:49,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:49,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838379812] [2022-03-20 21:15:49,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 21:15:49,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:49,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:49,130 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:15:49,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 21:15:49,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 21:15:49,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:49,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 21:15:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:50,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:50,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-20 21:15:50,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:50,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433399462] [2022-03-20 21:15:50,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:50,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838379812] [2022-03-20 21:15:50,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838379812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:50,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:50,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 54 [2022-03-20 21:15:50,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:50,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1804885761] [2022-03-20 21:15:50,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1804885761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:50,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:50,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 21:15:50,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745266579] [2022-03-20 21:15:50,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:50,696 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 21:15:50,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 21:15:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:50,697 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-20 21:15:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:51,537 INFO L93 Difference]: Finished difference Result 448 states and 496 transitions. [2022-03-20 21:15:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 21:15:51,538 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) Word has length 437 [2022-03-20 21:15:51,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:51,549 INFO L225 Difference]: With dead ends: 448 [2022-03-20 21:15:51,549 INFO L226 Difference]: Without dead ends: 443 [2022-03-20 21:15:51,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 820 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3769, Invalid=6131, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 21:15:51,550 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 180 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:51,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 456 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:51,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-20 21:15:51,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-03-20 21:15:51,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 341 states have (on average 1.1407624633431086) internal successors, (389), 341 states have internal predecessors, (389), 52 states have call successors, (52), 51 states have call predecessors, (52), 49 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-20 21:15:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 491 transitions. [2022-03-20 21:15:51,597 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 491 transitions. Word has length 437 [2022-03-20 21:15:51,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:51,598 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 491 transitions. [2022-03-20 21:15:51,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-20 21:15:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 491 transitions. [2022-03-20 21:15:51,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-03-20 21:15:51,622 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:51,622 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:51,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-20 21:15:51,822 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 21:15:51,822 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:51,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 93 times [2022-03-20 21:15:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:51,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [611199442] [2022-03-20 21:15:51,823 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 94 times [2022-03-20 21:15:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:51,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406572149] [2022-03-20 21:15:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:51,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:51,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:51,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89694347] [2022-03-20 21:15:51,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 21:15:51,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:51,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:51,835 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:15:51,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 21:15:52,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 21:15:52,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 21:15:52,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 21:15:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 21:15:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 9823 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 21:15:52,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 21:15:53,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 5499 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-03-20 21:15:53,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 21:15:53,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406572149] [2022-03-20 21:15:53,326 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 21:15:53,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89694347] [2022-03-20 21:15:53,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89694347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 21:15:53,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 21:15:53,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 54 [2022-03-20 21:15:53,326 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 21:15:53,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [611199442] [2022-03-20 21:15:53,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [611199442] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 21:15:53,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 21:15:53,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 21:15:53,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109160066] [2022-03-20 21:15:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 21:15:53,328 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 21:15:53,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:53,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 21:15:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 21:15:53,335 INFO L87 Difference]: Start difference. First operand 443 states and 491 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-20 21:15:54,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 21:15:54,160 INFO L93 Difference]: Finished difference Result 457 states and 506 transitions. [2022-03-20 21:15:54,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 21:15:54,161 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) Word has length 446 [2022-03-20 21:15:54,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 21:15:54,162 INFO L225 Difference]: With dead ends: 457 [2022-03-20 21:15:54,162 INFO L226 Difference]: Without dead ends: 452 [2022-03-20 21:15:54,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3822, Invalid=6278, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 21:15:54,164 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 169 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 21:15:54,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 458 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 21:15:54,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-20 21:15:54,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-03-20 21:15:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 348 states have (on average 1.1408045977011494) internal successors, (397), 348 states have internal predecessors, (397), 53 states have call successors, (53), 52 states have call predecessors, (53), 50 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 21:15:54,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 501 transitions. [2022-03-20 21:15:54,235 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 501 transitions. Word has length 446 [2022-03-20 21:15:54,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 21:15:54,236 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 501 transitions. [2022-03-20 21:15:54,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-20 21:15:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 501 transitions. [2022-03-20 21:15:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-03-20 21:15:54,243 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 21:15:54,243 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 21:15:54,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 21:15:54,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:54,449 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 21:15:54,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 21:15:54,450 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 95 times [2022-03-20 21:15:54,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 21:15:54,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [792594849] [2022-03-20 21:15:54,450 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 21:15:54,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 96 times [2022-03-20 21:15:54,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 21:15:54,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869802163] [2022-03-20 21:15:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 21:15:54,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 21:15:54,463 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 21:15:54,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862608644] [2022-03-20 21:15:54,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 21:15:54,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 21:15:54,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 21:15:54,464 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 21:15:54,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process